Wind-induced dynamic excitation is becoming a governing design action determin-ing size and shape of modern Tall Timber Buildings (TTBs). The wind actions generate dynamic loading, causing discomfort or annoyance for occupants due to the perceived horizontal sway – i.e. vibration serviceability failure. Although some TTBs have been instrumented and meas-ured to estimate their key dynamic properties (natural frequencies and damping), no systematic evaluation of dynamic performance pertinent to wind loading has been performed for the new and evolving construction technology used in TTBs. The DynaTTB project, funded by the Forest Value research program, mixes on site measurements on existing buildings excited by heavy shakers, for identification of the structural system, with laboratory identification of building elements mechanical features coupled with numerical modelling of timber structures. The goal is to identify and quantify the causes of vibration energy dissipation in modern TTBs and pro-vide key elements to FE modelers.

The first building, from a list of 8, was modelled and tested at full scale in December 2019. Some results are presented in this paper. Four other buildings will be modelled and tested in spring 2020.

Wind-induced dynamic excitation is a governing design action determining size and shape of modern Tall Timber Buildings (TTBs). The wind actions generate dynamic loading, causing discomfort or annoyance for occupants due to the perceived horizontal sway, i.e. vibration serviceability problem. Although some TTBs have been instrumented and measured to estimate their key dynamic properties (eigenfrequencies, mode shapes and damping), no systematic evaluation of dynamic performance pertinent to wind loading had been performed for the new and evolving construction technologies used in TTBs. The DynaTTB project, funded by the ForestValue research program, mixed on site measurements on existing buildings excited by mass inertia shakers (forced vibration) and/or the wind loads (ambient vibration), for identification of the structural system, with laboratory identification of building elements mechanical features, coupled with numerical modelling of timber structures. The goal is to identify and quantify the causes of vibration energy dissipation in modern TTBs and provide key elements to finite element models. This paper presents an overview of the results of the project and the proposed Guidelines for design of TTBs in relation to their dynamic properties.

In current practices crawl spaces are typically ventilated with outdoor air. This leads very often to high relative humidity especially in the beginning of the summer, which can be problematic if the excess humidity cannot be ventilated efficiently enough. This paper introduces a crawl space concept where the crawl space is highly insulated and traditional ventilation openings are replaced by minimal mechanical exhaust ventilation set by pressure difference with the aim to prevent potential pollutants to penetrate indoors through the base floor. The concept that has been developed based on the simulation study is tested in this study with field measurements in four single family houses. Continuous measurements of relative humidity and temperature in crawl spaces and outdoor air were running more than one year in each building. The results revealed that all the crawl spaces had very low relative humidity, mostly below 75% and for very short periods close to 80% even though some of the buildings were new and construction phase moisture was drying out. The results revealed that the crawl space concept studied provided an ultimate moisture safety and can be recommended for all buildings with wooden floor. © The Authors

For the solar energy industry to increase its competitiveness, there is a global drive to lower the cost of solar-generated electricity. Photovoltaic (PV) module assembly is material-demanding, and the cover glass constitutes a significant proportion of the cost. Currently, 3-mm-thick glass is the predominant cover material for PV modules, accounting for 10%–25% of the total cost. Here, we review the state-of-the-art of cover glasses for PV modules and present our recent results for improvement of the glass. These improvements were demonstrated in terms of mechanical, chemical and optical properties by optimizing the glass composition, including addition of novel dopants, to produce cover glasses that can provide (i) enhanced UV protection of polymeric PV module components, potentially increasing module service lifetimes; (ii) re-emission of a proportion of the absorbed UV photon energy as visible photons capable of being absorbed by the solar cells, thereby increasing PV module efficiencies and (iii) successful laboratory-scale demonstration of proof of concept, with increases of 1%–6% in Isc and 1%–8% in Ipm. Improvements in both chemical and crack resistance of the cover glass were also achieved through modest chemical reformulation, highlighting what may be achievable within existing manufacturing technology constraints. © 2020 The Authors.

This study investigated the properties and sustainability of cement-bonded composites containing industrial residues such as wood chips, tyre fibres and biomass combustion residues, i.e. bottom ash (BA) and fly ash (FA). The effect of cement-to-raw material (wood/tyre fibre) ratio (C/RM) and the aggregate content (BA and FA) on thermal and mechanical properties of the composites were investigated. Scanning electron microscopy (SEM) and life cycle analysis (LCA) were also conducted. The results revealed that as the aggregate content increased in wood composites, the mechanical properties also increased. The mean thermal conductivity and volumetric heat capacity of tyre composite samples were 0.37 W/mK and 1.2 MJ/m3K respectively, while the respective values for wood composite samples were 0.29 W/mK and 0.81 MJ/m3K. SEM analysis showed adequate bonding between wood/tyre fibres and cement matrix. LCA revealed that the materials share of the total primary energy use was about 60% for all analysed composites. © 2021 The Author(s)

Noisy journeys: An investigation of the sound environment in an incubator during ambulance transports

Each year, between 300 and 350 transports are carried out by the Neonatal Transport Team Göteborg in Västra Götaland Region (VGR). The majority of these transports (approximately 80 %) are conducted using road ambulances, and most patients are premature infants born before 37 weeks of gestation. The central nervous system of premature infants is not sufficiently developed, resulting in a reduced ability to self-regulate and selectively limit or inhibit incoming stimuli, thereby increasing their vulnerability to stress and its negative physiological effects. Noise is one of the main stress-inducing stimuli that premature infants are exposed to in the extrauterine environment. Unlike the acoustic environment of the womb, which is characterized by low-frequency background noise where the mother’s voice stands out distinctly, the extrauterine environment in neonatal intensive care units (NICU) or during transport is dominated by unpredictable and highly variable sounds with a broad frequency spectrum. Research has shown that high noise levels can cause serious health effects in premature infants and negatively impact their growth and healing processes. Results from noise measurements conducted during neonatal transports with VGR’s incubator transport ambulance indicate that the transported infants are frequently exposed to noise levels exceeding 70 dB(A), with peak levels surpassing 110 dB(C), which are far above the guidelines for perinatal care established by the American Academy of Pediatrics. This study examines the noise levels in VGR’s incubator transport ambulance as well as the infants’ heart rates during transport. The report also outlines the various guidelines and requirements for noise in environments where neonatal infants receive care and highlights the discrepancies between these standards. The aim of this study is to provide an overview and analysis of the auditory environment to which premature and sick neonatal infants are exposed during ambulance transports in incubator and to serve as a basis for future measures to protect infants from harmful noise during transport.

Experience with wooden multi-storey houses have shown that impact sound insulation is one of most critical issues to ensure a good indoor environment. Even in cases where the impact sound insulation is fulfilled, people perceive the sound from e.g. walking neighbours as very disturbing. To investigate the subjective perception, a test facility is needed which allows for a coherent evaluation of different floor designs by listening test. The facility should ensure, that when comparing different floors, the same excitation by a walker and the same receiving room are involved. Only the floor design should be changed. As a consequence the spread in the data will only be due to the spread in the perception by subjects. In this paper a virtual design tool for low frequency impact sound insulation is presented, which consists of four parts; measured walking forces, floor models, an auralisation system which consists of a grid of loudspeakers simulating the vibration of the floor and a receiving room furnished as a common living room. In a pilot study a listening test is carried out for 13 different floors with different impact sound spectra at frequencies below 100 Hz. The results indicate that the judged annoyance strongly correlates with the judged loudness. However, there is a substantial spread observed in between the subjects participating in the listening tests. To understand this spread, a more extended study is needed with more participants and a classification of the subjects with respect to criteria such as noise sensitivity or age.

Low-frequency impact sound caused by upstairs neighbors walking on the floor is a key acoustic challenge regarding lightweight floors and a major source of disturbance particularly in wooden buildings. To investigate the effect of floor design on the perceived walking sound, a virtual design tool has been developed, which allows for auralising the impact sounds containing low frequencies down to 20 Hz. Using this tool, footstep sounds on 10 different lightweight floors were auralised by a loudspeaker grid mounted in the ceiling of an acoustically controlled lab, which is furnished as a common living room. The walking sounds were subjectively evaluated through listening tests while the subjects were sitting freely on a sofa without needing to use any extra listening equipment. The listening test results suggest that loudness, thumpiness and reverberation are correlated with the perceived annoyance. The results also indicate a correlation between annoyance and age as well as the individual experience of earlier exposure to noise.

Low-frequency impact sound caused by upstairs neighbors walking on the floor is a key acoustic challenge regarding lightweight floors and a major source of disturbance particularly in wooden buildings. To investigate the effect of floor design on the perceived walking sound, a virtual design tool has been developed, which allows for auralising the impact sounds containing low frequencies down to 20 Hz. Using this tool, footstep sounds on 10 different lightweight floors were auralised by a loudspeaker grid mounted in the ceiling of an acoustically controlled lab, which is furnished as a common living room. The walking sounds were subjectively evaluated through listening tests while the subjects were sitting freely on a sofa without needing to use any extra listening equipment. The listening test results suggest that loudness, thumpiness and reverberation are correlated with the perceived annoyance. The results also indicate a correlation between annoyance and age as well as the individual experience of earlier exposure to noise. © 2023 First author et al. This is an open-access article distributed under the terms of the Creative Commons Attribution 3.0 Unported License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Screen printed piezoelectric polyvinylidene fluoride?trifluoro ethylene (PVDF?TrFE)-based sensors laminated between glass panes in the temperature range 80?110?°C are presented. No degradation of the piezoelectric signals is observed for the sensors laminated at 110?°C, despite approaching the Curie temperature of the piezoelectric material. The piezoelectric sensors, here monitoring force impact in smart glass applications, are characterized by using a calibrated impact hammer system and standardized impact situations. Stand-alone piezoelectric sensors and piezoelectric sensors integrated on poly(methyl methacrylate) are also evaluated. The piezoelectric constants obtained from the measurements of the nonintegrated piezoelectric sensors are in good agreement with the literature. The piezoelectric sensor response is measured by using either physical electrical contacts between the piezoelectric sensors and the readout electronics, or wirelessly via both noncontact capacitive coupling and Bluetooth low-energy radio link. The developed sensor concept is finally demonstrated in smart window prototypes, in which integrated piezoelectric sensors are used to detect break-in attempts. Additionally, each prototype includes an electrochromic film to control the light transmittance of the window, a screen printed electrochromic display for status indications and wireless communication with an external server, and a holistic approach of hybrid printed electronic systems targeting smart multifunctional glass applications.

Batteryless hybrid printed electronic systems manufactured on glass substrates are reported. The electronic system contains a sensor capable of detecting water, an electrochromic display, conductors, a silicon chip providing the power supply through energy harvesting of electromagnetic radiation, and a silicon-based microcontroller responsible for monitoring the sensor status and the subsequent update of the corresponding display segment. The silicon-based components were assembled on the glass substrate by using a pick and place equipment, while the remainder of the system was manufactured by screen printing. Many printed electronic components, often relying on organic materials, are sensitive to variations in environmental conditions, and the reported system paves the way for the creation of electronic sensor platforms on glass substrates for utilization in see-through applications in harsh conditions. Additionally, this generic hybrid printed electronic sensor system also demonstrates the ability to enable autonomous operation through energy harvesting in future smart window applications.

Partial repair of waterproofing systems – Part 2 - Field survey

This research project has been terminated prematurely at the request of the funder. The decision to terminate was made as the project has not received suitable objects to the extent required for the project to be carried out as it was planned and promised in the application. It has been unexpectedly difficult to get suitable objects for the project. The idea was that the insurance companies represented in the project team would provide the project with suitable objects. Only four objects have been received for the project. In these objects, humidity sensors have been deployed and measurements have begun. With the Invisense system, only starting measurements to be used as a reference to the next measurement have been carried out. This means that there are no trends to ana-lyse. For the other measurement systems (iioote and Talkpool), the measurements have been ongoing for about six and nine months respectively. In some of the objects, the measurements do not start after installation. It is likely that the sensors do not have contact with the internet via the LoRaWAN technology used. At the objects where measurements start, the moisture level appears to be at a normal level, there does not seem to be any leakage.

 Pilot surveys in labs This project is the first part of an intended major project to verify methods for partial repairs and methods for quality assurance of these repairs. This part of the project is implemented in order to make the next part of the project (Part 2. Field study) credible and valid. The purpose is to investigate whether selected measurement systems are capable of warning of excess moisture where leakage occurs so that there is no consequential damage to the building. The aim of this part is to evaluate and build knowledge about how sensors should be used and the possibility to interpret results from these. The study of the function of the warning systems for moisture and water damage that will be used in the future field study has been carried out in a mock-up that has been developed within the project. The project has been carried out with five different moisture sensor systems. During the entire test period, RISE have carried out measurements of temperature and moisture level in the test set’s timber framework compartments. Measured values from the five moisture sensor systems have been compared to values from RISE's calibrated temperature and humidity sensors. The surveys carried out can be grouped as follows: • Function control of the moisture system's ability to detect elevated moisture levels in each mock-up’s framework. • Loading of undamaged floor and wall penetrations with water  • Loading of pre-damaged floor and wall penetrations with water  • Loading of partially repaired floor and wall penetrations with water  Function control Moisture sensor systems 2, 3, 4 and 5 show a relatively good compliance with RISE's calibrated moisture and temperature sensors, usually only a few percentage points deviation is noted. Note that the test procedure selected is not relevant for Invisense’s moisture sensor system (system 1) as these are located in different positions than the other moisture sensor systems. Loading of undamaged floor and wall penetrations with water  Floor When loading the floors with water, leakage was noted in test space 1 already after two hours of loading. This was recorded by the moisture sensors located in test compartment 1. Wall Already a few minutes after commencement of water spraying, a rising moisture level was observed and also recorded by the moisture sensors in test compartment 3. It is worth noting that this leakage was so small that no free water was detected. An increase in moisture level was recorded at the wall penetrations in test compartment 4 after about 10 hours. At the end of the spraying cycle the moisture sensor sample in compartment 1 also showed a raised value. Loading of pre-damaged floor and wall penetrations with water  Floor All of the floor drains were subjected to pre-test damage, which consisted in removal of the clamping ring, cutting of the collar in one place and splitting it open a few centimetres. All moisture sensor systems used in the floor wells in test compartments 1-4 indicated elevated values. Wall Pre-test damage to all wall penetrations was carried out using an awl that was pressed into the space between the tile and wall box and thus puncturing the sealing collar. All moisture sensor systems used in the wall penetrations in test compartments 1-4 indicated elevated values. Loading of partially repaired floor and wall penetrations with water  Floor After partial repair where all floor drains were replaced, water loading of the floor was again carried out with 100 mm water.  No leakage was detected during the 5-day water load. None of the moisture sensor systems indicated any leakage. Wall After the partial repair where all pipe collars were replaced, water spraying took place again with alternating cold and warm water (1500 times).  No leakage was detected. None of the moisture sensor systems indicated any leakage.

Conclusion • All moisture sensor systems in the study have the capability to show that leakage has occurred • It is not the absolute measured value of the moisture level that determines whether the waterproofing system is leaking or not  

It is the change in the moisture level in the construction itself that is crucial to the question as to whether it is to be opened up or not.

Projektet har byggt vidare på erfarenheter från de två tidigare projekten som ingått i E2B2-program-met, projekten 40636–1 och 40636–2 som handlade om lufttäthet i klimatskalet.

I det här projektet har skiktet som finns utanför isoleringen, det så kallade regn- och vindskyddet studerats. Om detta skikt inte fungerar och isoleringsmaterialet blir vått eller att vinden tillåts blåsa igenom isoleringsmaterialet förlorar det sin isolerande förmåga, med högre energianvändning som en av följderna. Avsikten har varit att vidareutveckla provningsmetoden som togs fram i de tidigare pro-jekten. Nu har även skiktens regn- och vindtäthet undersökts. Provningsmetoden har fungerat bra vid pilotprovningarna. Man kan se en förändring av lufttätheten vid mätningar före respektive efter värmebehandlingen. Vi noterar att alla de tre provande regn- och vindskyddssystemen är mycket lufttäta. Det borgar för en god energihushållning.

Värmebehandlingen har gett varierande resultat. En del mätningar visar ett ökat läckage efter vär-mebehandlingen medan andra mätningar visar på minskat luftläckage efter värmebehandlingen.

Alla de undersökta regn- och vindskyddssystemen uppvisar en högst varierande grad av läckage vid regnbelastning under samtidigt pulserande vindbelastning (slagregn). Det faktum att regn- och vind-skyddssystemen inte är helt vattentäta är problematiskt då det är en av förutsättningarna för att byggnader långsiktigt ska kunna ha en låg energianvändning. Det kan också vara ett problem då regn- och vindskyddssystemen ibland används i stället för ett separat väderskydd på en byggarbets-plats.

Functional testing of waterproofing systems for use behind ceramic tiling based on flexible sheets 2022 This research project is a repetition of previously completed projects. These projects span a long period of time, 12 years. The projects were completed during the period 2010 to 2022. Functional testing The result is better than before. 2022 2019 (1) 2016 (2) 2014 (3) 2010 (4) Result Result Result Result Result Result No leakage 9 (47 %) 6 (32 %) 8 (40 %) 3 (15 %) 0 (0 %) Leakage 10 (53 %) 13 (68 %) 12 (60 %) 17 (85 %) 5 (100 %) In this investigation, most of the leaks are located to penetrations of large and small sewer pipes. In this investigation, we have on several occasions seen that the pipe sleeves have had substandard quality. This has manifested itself in the fact that the polymeric material which is to seal around the pipe during the test has lost its sealing ability. It is probable that the material has developed a residual deformation (settling) which means that the material has lost its ability to seal around the pipe. We have also noticed that pipe cuffs have delaminated, the layers in the cuff during the test have been divided into their components. Leakage has also occurred at inner corners, outer corners and at chafing. Only a few, two, leaks at connections to floor drains have been noted. Better yet, none of the examined waterproofing systems showed leaks that were so extensive that one can speak of a total damage. Water vapour resistance and mass per unit area The vast majority of investigated waterproofing foils have a water vapour resistance of between 2.5 and 4.5 million s m, which is a high or very high value. Results for five waterproofing foils fall below 2.5 million s / m. Based on the determinations of water vapor resistance and basis weight, it can be concluded that probably six of the waterproofing suppliers have developed new or changed foils since the last survey. The trend of wanting to make thinner foils seems to have been broken. Most of the waterproofing foils have a higher vapor passage resistance now than in the previous survey. It is also noteworthy that the PVC sealing layer has a low water vapor passage resistance. The waterproofing foil has basically the same basis weight now compared to the previous survey. Indication of long-term properties To obtain an indication of the amount of added antioxidants that improve the long-term properties of the materials, DSC analyses of the waterproofing foils have been performed. Compared with the previous study, the induction temperatures are at about the same level as before, only small differences occur. The average induction temperature for all polyethylene films is 216 ° C and, in summary, the materials appear to be stabilized at the same level as the previous study. In the same way as in the survey, 2016, most materials seem to be more stabilized for long-term use compared with the previous study, 2014. However, for all analysed materials, to make a reliable service life prediction of the material, a more comprehensive aging study is recommended

Trenden i samhället är att öka återvinningsgrad av produkter för att skapa ytterligare värden av förbrukade produkter. Detta projekt har initierats av möjligheten att återanvända mjölkkartonger till bygg- och möbelskivor i syfte att minska byggindustrins totala miljöpåverkan genom minskat uttag av primärmaterial och lägre CO2 belastning. Förpackningsmaterial för mat och dryck innehåller ofta ett skikt av plast, av typen PET med syfte att hålla livsmedlet färskt och fritt från atmosfären. Efter användning samlas förpackningar in till förbränning då det inte finns något annat sätt att återvinna/återbruka dessa material. Det är svårt att skilja pappkartong och plast åt vid dagens förbränningsanläggningar och därmed skapas stora förorenande utsläpp (bland annat CO2). Det är önskvärt att hitta ett område där kartonger för livsmedel kan återvinnas till ett annat högvärdigt material och då kan ersätta material med högre miljöbelastning. Att göra en skiva till bygg och möbelindustrin genom att sönderdela kartonger för livsmedel och utan tillsatser pressa dem till en produkt som därmed ersätter mer belastande skivor som gips och OSB ger industrin en möjlighet att ytterligare minska sin miljöpåverkan. Ett potentiellt område kan vara inom byggindustrin, och att då hitta en ersättning eller komplement till de skivmaterial som idag används i väggar och tak. Dagens skivor är tillverkade av blandade material, i form av OSB (träspån och lim) och gips (kalk och papp). Initiala prover, genomförda av tillverkaren ej RISE, av den framtagna skivan har visat på god teknisk prestanda, men byggindustrin är på goda grunder kritisk till nya material, varför det krävs en noggrann kontroll av prestanda på såväl lång som kort sikt för att säkerställa ett kontrollerat byte till mer hållbart material. Metoden att samla in och sönderdela kartonger på ett band för press under tryck och värme, och att skapa en bygg- och möbelskiva producerad av återvunnet material utan andra tillsatser i processen är lovande. Den ingående andelen PET agerar som bindemedel för att skapa skivan som är homogen och stark. Initiala tester har visat en funktionsprestanda mellan OSB och gips, varför målsättningen är att ersätta kombinationer av dessa i flera applikationer. Introduktion av material och produkter kräver en robusthet avseende tekniska egenskaper samt tester i faktiska miljöer för introduktion i byggindustrin. Men ett ökat intresse för och krav ur miljösynpunkt öppnar för möjligheter att skapa värde. För att realisera detta värde finns det ett behov av att testa och verifiera olika tekniska egenskaper av produkten mot de funktionella krav som finns på marknaden för denna typ av produktändamål. Tekniska egenskaper som bör verifieras är bland annat formstabilitet, tålighet mot fukt, akustik, brand och avslutningsvis de miljöegenskaper som uppstår.

Through the use of genome-wide association studies (GWAS) mapping it is possible to establish the genetic basis of phenotypic trait variation. Our GWAS study presents the first such effort in Norway spruce (Picea abies (L). Karst.) for the traits related to wood tracheid characteristics. The study employed an exome capture genotyping approach that generated 178 101 Single Nucleotide Polymorphisms (SNPs) from 40 018 probes within a population of 517 Norway spruce mother trees. We applied a least absolute shrinkage and selection operator (LASSO) based association mapping method using a functional multi-locus mapping approach, with a stability selection probability method as the hypothesis testing approach to determine significant Quantitative Trait Loci (QTLs). The analysis has provided 30 significant associations, the majority of which show specific expression in wood-forming tissues or high ubiquitous expression, potentially controlling tracheids dimensions, their cell wall thickness and microfibril angle. Among the most promising candidates based on our results and prior information for other species are: Picea abies BIG GRAIN 2 (PabBG2) with a predicted function in auxin transport and sensitivity, and MA_373300g0010 encoding a protein similar to wall-associated receptor kinases, which were both associated with cell wall thickness. The results demonstrate feasibility of GWAS to identify novel candidate genes controlling industrially-relevant tracheid traits in Norway spruce. © 2020, The Author(s).

Drought is a major factor affecting crops, thus efforts are needed to increase plant resilience to this abiotic stress. The overlapping signaling pathways between drought and cell wall integrity maintenance responses create a possibility of increasing drought resistance by modifying cell walls. Here, using herbaceous and woody plant model species, Arabidopsis and hybrid aspen, respectively, we investigated how the integrity of xylan in secondary walls affects the responses of plants to drought stress. Plants, in which secondary wall xylan integrity was reduced by expressing fungal GH10 and GH11 xylanases or by affecting genes involved in xylan backbone biosynthesis, were subjected to controlled drought while their physiological responses were continuously monitored by RGB, fluorescence, and/or hyperspectral cameras. For Arabidopsis, this was supplemented with survival test after complete water withdrawal and analyses of stomatal function and stem conductivity. All Arabidopsis xylan-impaired lines showed better survival upon complete watering withdrawal, increased stomatal density and delayed growth inhibition by moderate drought, indicating increased resilience to moderate drought associated with modified xylan integrity. Subtle differences were recorded between xylan biosynthesis mutants (irx9, irx10 and irx14) and xylanase-expressing lines. irx14 was the most drought resistant genotype, and the only genotype with increased lignin content and unaltered xylem conductivity despite its irx phenotype. Rosette growth was more affected by drought in GH11- than in GH10-expressing plants. In aspen, mild downregulation of GT43B and C genes did not affect drought responses and the transgenic plants grew better than the wild-type in drought and well-watered conditions. Both GH10 and GH11 xylanases strongly inhibited stem elongation and root growth in well-watered conditions but growth was less inhibited by drought in GH11-expressing plants than in wild-type. Overall, plants with xylan integrity impairment in secondary walls were less affected than wild-type by moderately reduced water availability but their responses also varied among genotypes and species. Thus, modifying the secondary cell wall integrity can be considered as a potential strategy for developing crops better suited to withstand water scarcity, but more research is needed to address the underlying molecular causes of this variability. 

From an economic and environmental perspective, the use of less chemicals in the production of cellulose nanofibrils (CNFs) is advantageous. In this study, we investigated the oxidation (TEMPO/NaClO2/NaClO, pH 6.8) of softwood (SW) particles with varying amounts of TEMPO (16, 8 or 0 mg g−1 of wood). Following, TEMPO-oxidized SW nanofibrils (TO-SWNFs) were obtained by nanofibrillation and their size, morphology, and crystallite size were assessed. Hydrogel networks of TO-SWNFs were prepared and mechanical properties were measured in dH2O and phosphate buffered saline (PBS) to compare their performance for possible biomedical applications such as wound dressings. The results reveal that the presence of TEMPO is of importance for TO-SWNF network properties, presenting higher eq. H2O absorption (≈2500 %) and elongation at break (≈10 %) with good wet strength (≈180 kPa). In addition, a decrease in use of TEMPO catalyst from 16 to 8 mg g−1 of wood is possible, without detrimental effects on hydrogel network properties (dH2O absorption ≈ 2000 %, elongation at break ≈ 13 %, wet strength ≈ 190 kPa) related to applications as wound dressings. 

Diffusion kinetics and structural properties of chemically strengthened titania-doped soda-lime silicate glasses were studied by depth-resolved X-ray photoelectron spectroscopy, Raman spectroscopy and spectrophotometry. The glasses were ion exchanged, whereby Na+ in the glass was replaced by K+ in a molten salt bath, at four different treatment temperatures between 350 and 500 °C. The alkali diffusion coefficient, DK-Na, and corresponding activation energy were calculated to be between 3.26×10−12 and 4.47×10−11 cm2s−1 and between 101.1 kJmol−1 and 105.6 kJmol−1, respectively. DK-Na was observed to decrease as the TiO2 concentration was increased. Raman analysis showed Q3-silicate species with different bond lengths, which was attributed to surface compressive stresses, and increasing Si-O-Si bond angle with increasing ion exchange temperature. Ti3+ ions exist as a minor species in the glasses and its concentration depends on the TiO2 content. Deconvolution of the optical absorption spectra reveals Jahn-Teller compressive distortion of the Ti3+ octahedral coordination.

Diffusion kinetics and structural properties of chemically strengthened titania-doped soda-lime silicate glasses were studied by depth-resolved X-ray photoelectron spectroscopy, Raman spectroscopy and spectrophotometry.

Chemical strengthening (CS) is frequently used to strengthen thin glasses. CS of glass is based on ion exchange of larger ions from a molten salt into glass. Both the ion and counter ion are conventionally monovalent alkali ions.

Diffusion kinetics and structural properties of chemically strengthened titania-doped (TiO2) soda-lime silicate (SLS) glasses were studied by depth-resolved X-ray photoelectron spectroscopy, Raman spectroscopy and spectrophotometry. The glasses were ion exchanged, whereby Na+ in the glass was replaced by K+ in a molten salt bath, at four different treatment temperatures between 350 and 500 °C.

The following samples were prepared and analyzed by X-ray Photoelectron Spectroscopy (XPS): (1) SLS, (2) 4.7% TiO2, and (3) 9.9% TiO2. The ion exchange procedure was performed for 5 h at four different temperatures below Tg (350, 400, 450 and 500 °C). Before XPS measurements, the samples were wet-etched using hydrofluoric (HF) acid to produce samples with six different etching depths.

The Raman scattered light was detected in the backscattering configuration employing linear polarization and 2400 lines/mm grating, and a 100x objective lens. Depth profile spectra were collected at six different depths of 0, 10, 20, 30, 40, and 50 µm for each glass sample, employing 12 scans with a 10 s exposure time for each scan.

Spectrophotometric measurements were conducted before and after K+/Na+ ion-exchange treatmeatment for 5 h at 500 °C, collected between 300 and 2500 nm.

Thirty years of building with wood Sweden has a long tradition of building in wood. Today’s tall wooden buildings, often higher than two stories, are based on completely different technical solutions to the ones used historically. Modern wood construction is rooted in extensive international and national research and development – not on a single national tradition. It began simultaneously across Europe, as the rule change was part of an EU directive. Modern wood construction is also characterized by a high level of industrial prefabrication and short construction times, while modern IT is widely used in the planning and production process. Altogether, these factors entail a very different process from concept to completion, to the one used in the traditional construction industry. A whole host of factors determine the value of a building. It must be fit for purpose, sustainable and attractive. It should be eco-friendly and able to be erected and managed at a reasonable cost. Five different organizations have now been interviewed about their experiences and about the property management. All the interviewees are very positive to build, use and manage wooden buildings. Experience they have gathered by themselves and in cooperation with others give them the confidence to keep building with wood. They can meet every present and predicted demand by customers and governmental rule or regulation. The setbacks are few and easy to solve and interviewees can’t find any reason to not build in wood.

This report is about the evaluation of the pilot installation of a new wooden façade element system that was mounted on two four-story timber buildings. Technical solutions were evaluated, mounting time, moisture and deformations were measured, and interviews were conducted with builders on-site. The mounting started in April 2020 and was followed-up with measurements and interviews during 2020. The two buildings were built by Lindbäcks Bygg AB on Porsön in Luleå, Sweden and the developer was Lindbäcks Fastigheter AB. The façade elements were prefabricated by Lindbäcks Bygg AB in the factory at Öjebyn in Piteå Sweden. The mounting work went well, and the builders were positive about the facade system. When the builders had learned how to carry out the work, it took three minutes per façade element, which is equivalent to 0.9 m2/min. This is faster than the traditional installation of a facade on a construction site. The assembly around the windows took about 10 minutes, which is about the same time as in traditional assembly. During 8 months of measurements the average moisture content (MC) behind the façade elements was about 20% during winter (low T, high RH) and about 11% during summer. That is within expected values due to the annual variation in climate. The deformation was measured with laser scanning and gave a deviation of ±1 cm from a perfect plane, indicating a better dimensional stability than traditionally mounted wooden facades. From a working environment perspective, the assembly work was quieter as no nail guns were needed and the builders did not need to handle individual panel boards. Significantly less nails and screws were needed compared to traditional assembly. Experience from the assembly show the possibility for improvements. The construction platform was not optimal for loading elements during assembly. When the builders had gained some experience of the system, the limitation was to get the elements up quickly enough. A fast and efficient assembly requires a detailed planning in the design phase, and the elements should be numbered in a logical way and sufficient packaging needs to be secured. The promising results show the potential for a future way to manufacture and mount wooden facades. “The facade of the city Swift Stylish Smart” is a project within the strategic program Bioinnovation founded by Vinnova (Sweden’s innovation agency), Energimyndigheten (Swedish Energy Agency), Formas (A Swedish Research Council for Sustainable Development), and the industry partners.

Projektet gör uppföljning för att se hur det ser ut idag och bekräfta funktionen av träbaserade balkongplattor efter cirka 8–12 år. Informationen ger underlag för en bättre material- och produktkännedom som kan vara underlag för till exempel Garantiåtaganden samt underhållsplanering. Projektet bekräftar och verifierar att produkterna uppför sig som förväntat utan större avvikelse. Test med ett antal plattor som skadats genom åverkan har utförts i RISE Skellefteås labb. Gamla plattor på RISE med mätvärden 8 år bakåt i tiden visar fortfarande stabila värden och mätmässigt är de också identiska med nytillverkade plattor. Genom att använda denna kännedom blir förvaltarens tillståndsbedömning med en fuktindikator enkel. Ett par nya idéer till nya projekt för en fortsatt utveckling av balkongplattan har framkommit. I projektet har RISE bistått med olika frågor kring nytt typgodkännande. Även idéer för att använda plattan direkt på mark som grund har lyfts inom projektet och kommer att undersökas i annat projekt inom och sannolikt även utanför TCN. En platta som monterats med en del direkt på mark och en del hängande i luften har upptäckts med en kraftig skada. Omfattningen på skadan har undersökts och rapporteras i denna rapport. Ingen orsak till skadan kunde med säkerhet fastställas. Nya kontakter med nordiska teknikföretag har etablerats för att lättare hitta prisvärd och funktionell mätteknik i träsammanhang.

Samhället och mänskligheten står inför en av de största utmaningar vi har ställts inför någonsin. Klimatet berör oss alla. Aldrig tidigare har vi vetat så mycket om vårt beteende, vår påverkan och konsekvenserna för jordens klimat - samtidigt som vi fortsätter bygga vårt samhälle på ett på många sätt ohållbart vis. Idag står byggsektorn för cirka en femtedel av Sveriges samlade klimatutsläpp (Boverket, 2021). Fossilfritt Sverige bildades på initiativ av regeringen år 2015 inför FN:s klimatmöte i Paris, och lanserade år 2018 ”Färdplanen för bygg- och anläggningssektorn” (”färdplanen”), en av 22 branschspecifika färdplaner - med målsättning om en klimatneutral byggbransch till år 2045 (Fossilfritt Sverige, 2018). Sedan färdplanen lanserades 2018 har utveckling skett inom hållbarhets- och klimatområdet för Bygg- och anläggningssektorn. Exempelvis så har olika initiativ och plattformar startats upp med mål för minskad klimatpåverkan och klimatneutralitet, flertalet projekt med låg klimatpåverkan har genomförts, antal certifierade byggnader ökar, tillgång till betong och stål med lägre klimatpåverkan ökar och lagen om klimatdeklarationer har trätt i kraft. Trots denna utveckling finns det indikationer på att det går för långsamt och risk finns att färdplanens mål missas (Byggindustrin, 2022) (Fosilfritt, 2022) (Klimatpolitiska rådet, 2022). Detta utvecklingsprojekt syftade till att ta fram åtgärder för implementering och innovationer för att uppnå färdplanens mål. Projektets kartläggning, litteraturstudie inklusive enklare utsläppskartläggning förväntades ge en bild om vad som behöver göras framåt för att nå färdplanens mål och ligga till grund för ett förslag till aktiviteter och projekt som kan ligga till grund för en nationell genomförandeplan med en strategi och struktur för färdplanens implementerings- och innovationsarbete. Projektet har genomförts i ett antal arbetspaket med ingående aktiviteter, såsom nulägesanalys, litteraturstudier, utsläppskartläggning, intervjuer och workshops. Nulägesanalys och utsläppskartläggning har bestått att söka information och data i websökningar, litteraturstudier, och i samtal med branschaktörer om vilka genomförda och pågående initiativ och projekt som finns, samt kartlägga och redovisa utsläpp uppdelat på de olika branscherna inom bygg- och anläggningssektorn. Djupintervjuer har gjorts med ett flertal branschaktörer med kunskap, insyn och erfarenhet av klimat- och hållbarhetsarbete i bygg- och anläggningssektorn. I workshops, i projektet, kallade branschdialoger, har likt intervjuerna ställt ett antal frågor till en grupp branschaktörer och diskuterat dessa. I arbetet med gapanalys har bland annat ett framsynsarbete genomförts för att lyfta det som kan påverka och är avgörande för genomförandet av färdplanen. Projektet har samlat tankar och idéer från sektorns och forskarsamhällets både tongivande och engagerade personer. Beroende på vilka personer som har medverkat har detta resulterat det i olika utfall. Det som framkommit från intervjuerna, workshops och dialoger har inte direkt kontrollerats eller förankrats mot fakta och vetenskap, utan det har använts för att ge det underlag som detta projekts arbete vilar på tillsammans med projektets övriga arbete inom nuläges-, önskade- och gapanalyser. I det slutlig syntetiserade arbetet har projektgruppen valt ut det viktigaste, mest relevanta och intressanta ur de olika delaktiviteterna i projektet till åtta förändringsområden. Inom dessa respektive förändringsområde ges förslag till aktiviteter och projekt för färdplanens genomförande och måluppfyllelse. De åtta förändringsområden som projektet rekommenderar att färdplanens arbete framåt är: Flexibel och adaptiv användning samt ökad nyttjandegrad, Digitalisering, Hållbara material, produkter och system, Effektiv resursanvändning och cirkulära flöden, Elektrifiering, Regulatoriska krav och styrning, Hållbar finansiering och prissättning av miljöeffekten samt Energieffektivisering. Alla förslagen vilka var och en, och i kombination, bidrar till att accelerera klimatarbetet och minska klimatpåverkan. Av de resultat och förslag till aktiviteter och projekt till implementeringar och innovationer för färdplanens genomförande kan ett urval av dem återfinnas som uppmaningar i färdplanen. Att iii förslagen uppkommer igen drygt fyra år senare kan ses som ett behov att ytterligare fokusera på färdplanens implementering, då uppmaningarna ännu inte har gett den effekt som efterfrågats, eller inte har omhändertagits tillräckligt. De föreslagna aktiviteterna och projekten i detta arbete behöver vidareutvecklas, paketeras samt hitta finansieringslösningar för det fortsatta arbetet för färdplanens genomförande, så att det skapas ett reellt genomslag i branschen för att nå färdplanens mål. En generell rekommendationen från detta projekt är att skala upp pilot- och demoprojekt samt goda exempel till fullskaleprojekt i högre utsträckning samt att tillgängliggöra och dela resultat och underlag från dessa projekt för att öka transparensen mellan olika initiativ och projekt. De förändringsområde som utmärker sig mest och har i arbetet framhållits som de viktigaste samt anses ha störst påverkan på implementeringen av färdplanen för bygg och anläggningssektorn är: Regulatoriska krav och styrning, Elektrifiering, Flexibel och adaptiv användning samt nyttjandegrad samt Hållbar finansiering och prissättning av miljöeffekten. Projektet har vidare identifierat ett stort behov av sammanhållande och heltäckande klimatdata som är nedbrutna på olika delsektorer och ämnesområden inom bygg- och anläggningssektorn. Projektets rekommendation är därför att påskynda arbetet att kvantitativt beräkna de nationella klimatutsläppen som kan ligga till grund för att göra en nationell väsentlighetsanalys för att ge implementering av färdplanen rätt fokus och prioritering. Dock så visar projektets modulering att och analys är att reduktionen av klimatemissioner från bygg- och anläggningssektorn måste starta omgående. Vidare är utveckling av ett klimatfokuserat upphandlingsförfarande med relevanta och effektiva upphandlingskriterier av största vikt avseende framtida klimatrelaterade funktionskrav på bebyggelse genom hela livscykeln. Slutligen behöver nya affärsmodeller utforskas för att utveckla nya ekonomiska incitament som premierar kvalitet, upcycling, bevarande, återbruk och delande.

Bytespunkter såsom tågstationer och busshållplatser är fulla med visuell information och andra sinnesintryck. I dessa miljöer kan det vara svårt att navigera och summan av alla intryck som förmedlas kan orsaka visuell stress, särskilt för grupper med nedsatt orienteringsförmåga eller kognitiv förmåga. Det som är en behaglig och enkel visuell sökning och rörelse för någon kan vara utmanade för någon annan. Det kan tillföra ytterligare en förbättrad nivå till bytesplatsens utformning om man utgår från funktionalitet baserat på vad som händer i den mänskliga hjärnan och känslolivet – vilket kan skilja mycket mellan olika människor. Eftersom människors perception av omgivningen skiljer sig så pass mycket åt finns en utmaning i att skapa en gemensam miljö som passar alla så bra som möjligt och som samtidigt går att individanpassa så att varje person får sina behov tillgodosedda. Det här projektet har haft som syfte att undersöka hur bytespunkter kan bli lättare och mer självklara att navigera i, och samtidigt minska eller begränsa visuell stress. En annan uppgift för projektet var att ta hänsyn till resenärer med intellektuella och kognitiva funktionsvariationer. Projektet bestod av att göra en litteraturöversikt över relevant forskning på området, samt genomföra en designanalys och utveckla konceptförslag som skulle kunna testas och utvärderas i ett uppföljande projekt. Projektgruppen bestod av forskare från RISE, forskningsdesigner från Boid designbyrå, Borås Stad, samt teknikleverantörer Viscando, Tobii och Fagerhult. De utvalda bytespunkterna som undersöktes i projektet var Centralstationen och Södra torget i Borås. Litteraturöversikten (Se kap. 3 samt bilaga 1) visade att det saknas forskning på området kring bytespunkter, navigering, design och intellektuella och kognitiva funktionsvariationer. Allmänna principer för att underlätta navigering kunde identifieras, och en del publikationer föreslår olika interventioner i miljön som kan underlätta wayfinding, exempelvis inom belysning, landmärken och skyltar. Dock saknas robusta uppföljningar av vilka åtgärder som har önskad effekt. Det saknas också uppföljning kring vad som är specifikt hjälpsamt eller problematiskt för projektets målgrupper. Detta kan möjligen förklaras av att det är svårt att undersöka en miljö där så många olika saker händer samtidigt, vilket gör det utmanande att avgöra vilken effekt en specifik del av miljön har på människors navigeringsförmåga. Litteraturen pekade dock ut viktiga aspekter att ta hänsyn till, designprinciper, samt gav förslag på möjliga förbättringsåtgärder. I designanalysen (kap. 4) genomfördes intervjuer med sakkunniga inom funktionshinder från kommunen, platsbesök, utveckling av användarresor och en samskapande idéworkshop. Processen resulterade sedan i åtta olika konceptförslag (kap. 5) baserat på det som framkommit i litteraturstudien och designanalysen. Koncepten berör individuella hjälpmedel, digitala hjälpmedel, kunskapshöjande åtgärder för inkludering, belysning och skyltar. Som ett nästa steg föreslår vi att gå vidare med framförallt två av koncepten för testning och utvärdering, 1. Empatikampanj och 8. Ljusharmoni. Ett resonemang kring projektets resultat och nästa steg finns i kap. 6.

Although building systems made of cross-laminated timber (CLT) have become common in Sweden in the past 20 years and they have developed rapidly during the same period, steps remain to be taken to simplify the assembly of such systems, especially at construction sites. Current construction methods, however, remain labour-intensive and thus show room for improvement.

This paper describes a novel connection for the assembly of building elements made of CLT. Simple and inexpensive, the connection is fairly insensitive to manufacturing tolerances and enables rapid, more efficient construction than the connections for CLT structures currently used. Test results show the excellent strength and stiffness of the connection, which also allows the replacement of numerous fasteners, including nails and screws, with only a single steel rod. 

The presented project aims to develop prototypes for building connections inspired by the furniture and interior industry and explore them with representatives from the timber construction industry. The long-term vision is that actors from furniture and building industry together develop a smart system for assembly of building elements, which provide higher precision, faster and more efficient assembly than what is available today. The prototype connectiondeveloped in this project shows that the idea is ripe for full-scale investigation. Laboratory tests showed promising results due to the high failure loads obtained with very high stiffness.

Korslimmat trä (KL-trä) för byggnadsändamål är en produkt som togs fram i Centraleuropa i mitten av 1990-talet. Syftet med förstudien är att i samverkan utforska förslag för hur en framtida resurseffektivare KL-träprodukt kan utformas. Målet är att ta fram underlag för utveckling och genera en samling kring frågan. Det finns en medvetenhet för de omvärldsfaktorer som påverkar byggandet med KL-trä. Det finns en ökad efterfrågan på trä i byggsektorn och det finns ett dynamiskt tänkesätt för att ersätta betong med KL-trä. Ökad användning av skogsråvara, global uppvärmning och minskad tillgång via begränsningar i skogsbruk väcker frågor. Vilken råvara har vi i framtiden, vilka trädslag och hur ser tillgången ut? Det resulterande materialet har analyserats utifrån de olika perspektiven som representeras av intressentgrupperna i värdekedjan för byggande med KL-trä. Rapporten avslutas med projektidéer som framkom under arbetet med förstudien.

Laminated veneer products (LVPs) are veneers glued together into a predetermined shape. Experimental and numerical investigations were performed under lamination and simultaneously bending of veneer laminate to study the stress distribution in the laminate. Laminates of different thicknesses were made of peeled veneers of European beech. The veneers were coated with adhesive, inserted in a mould which had the shape of a semicircle, and finally pressed at 20°C to a laminate. Two Teflon-polymer films including sensors for measurement of the contact pressure were placed on both sides of the laminate to measure the local contact pressure (contact stress) between the laminate and the mould. At the beginning of the bending process, the contact stresses were locally distributed over the laminate in a similar pattern as in a three-point bending; after the laminate was further bent, the stress distribution rearranged to be as in four-point bending. In the end of the moulding, the local contact stresses increased over the entire laminate and reached a ‘peak-value’ over bent area in the middle part of the mould. A finite-element model was created to study the bending process. Regarding the overall development of the contact stress variations, the experimental and the numerical results agreed.

Formstabilitetsproblematik är ett vanligt problem vid sammanlimning av trä, papper eller dylikt. I denna studie har ett underlägg avsett för dukning undersökts avseende formstabilitet i förhållande till omgivande klimat. Underlägget är uppbyggt av papper, varav vissa med tryck, och en träfiberskiva som sammanlimmats.

Symmetri i en konstruktion är eftersträvansvärt för hög formstabilitet vilket är känt sedan tidigare. Att ytorna har ett liknande fuktupptag bidrar till symmetrin. Skivor som har en hårdare yta än motstående bör putsas för att skivans bägge ytor ska få ett liknande fuktupptag. Orienteringen av ingående delar i ett laminat kan minska respektive öka asymmetrin om ytorna har olika fuktupptagningsförmåga. Symmetrisk uppbyggnad likväl som symmetriskt fuktupptag är till gagn för hög formstabilitet.

Mikroorganismer kan växa på alla material om förutsättningarna är de rätta. Fukt är alltid den begränsande faktorn men andra faktorer, till exempel temperatur, kan påverka kritisk fuktnivå med avseende på start och etablering av mikrobiologisk påväxt. Mikrobiologisk påväxt på byggnadsmaterial är därför inte materialfråga utan snarare en hanterings- eller byggnadsteknisk fråga. 2009 konstaterar WHO i sin rapport Guidlines for indoor air quality att negativa hälsoeffekter motverkas effektivast genom att fukt och mikrobiella skador på och i byggnader förhindras. Nya studier har adderats sedan 2009 och ett antal vetenskapligt granskade artiklar i ämnet har publicerats. I arbetet med denna sammanställning har ingen artikel påträffats som motstrider den idag, på empiri, grundade uppfattningen att fukt och mögelskador i byggnader kan påverka innemiljön. En påverkan som i sin tur kan leda till negativa hälsoeffekter för människor. I nordiska länder så är det vanligast att fukt- och mögelskador finns inuti konstruktioner. För trähus som ofta är konstruerade av flera olika byggnadsmaterial finns en problematik som dels uppstår genom att mikroorganismer kan växa på dessa material dels genom att det finns risk att emissioner från påväxten sprids till innemiljön. För att bättre förstå när och hur människor exponeras för dessa ämnen behövs mer kunskap inhämtas om: - Hur och när emissioner från skador inuti konstruktioner når innemiljön. - Emissionernas sammansättning. - Skador på trä och hälsa specifikt - Kunskap om mögelarter och deras förekomst på olika byggnadsmaterial inklusive trä. - Vilka åtgärder behöver sättas in för att förhindra att påväxt uppstår vid fukt- och vattenskador (tid, temperatur, material mm)?

Trä i byggnader som exponeras för fukt eller fritt vatten blir med tiden utsatt för mikrobiell påväxt. När detta ska åtgärdas kallas det sanering vilket innebär att trä rengörs från påväxten, om inte materialet byts ner helt. Oavsett nyproduktion eller befintliga byggnader så säger lagen genom Miljöbalken och Plan- och bygglagen att påväxt som kan orsaka skada eller olägenhet för människors hälsa ska tas bort. Kemikalielagstiftningen betonar att skador som uppkommer så att kemiska produkter och bekämpningsmedel behöver användas ska undvikas om kunskap och tekniker för detta finns. När bekämpningsmedel väl används är det enbart den avsedda användningen enligt instruktionerna som tillåts. Detta gäller allt trä i byggnader där godkännande krävs. Vetenskapliga studier och myndigheter avråder från användning av kemiska medel för att sanera påväxt på trä. Anledningen är att de verkar ha begränsad effekt och att användningen innebär en risk för att det ökar mängden föroreningar i luften inomhus. Dessutom finns en risk att metoderna eventuellt bara dödar den mikrobiella påväxten, utan att den tas bort, och att även död/inaktiv påväxt kan innebära hälsorisker Aktörer inom bygg och företag som sanerar fuktskador efterlyser ett övergripande regelverk och riktlinjer för hantering av fuktskadat trä i byggnader. Sanering av mikrobiella organismer på trä utförs i stor omfattning vid nyproduktion av byggnader om de utsatts för nederbörd eller om skydd mot fukt och vattenskador varit bristfälligt. Fuktsäkerheten behöver prioriteras i större utsträckning i många fall. Redan vid planering av budget och projektering behövs relevanta strategier för att hantera fuktsäkerheten. Áv intervjuerna framgår att slipning av träytor är den vanligast använda saneringsmetoden, följt av isblästring och användning av kemiska medel för att rengöra och bleka virkesytan. Byggnader som utsätts för fritt vatten eller höga fukthalter kan efter längre tid få rötskador och insektskador. Röt- och insektskador åtgärdas genom att skadat material byts ut och/eller genom att behandling utförs med godkända bekämpningsmedel.

Studies investigating microbial diversity in buildings have been performed mainly through the study of dust collected from e. g. floors and door frames and on moisture damaged building materials. A great diversity of mould fungi has been found and the fungus flora is dominated by the genera Aspergillus and Penicillium. The building materials targeted in this specific study were sampled on the back of ceramic tiles from bathroom walls and floors. Furthermore, two different analyses were used to investigate to which degree this specific environment was supportive of microbial growth. Microbial findings were detected in 48 % of the specimens from the spots exposed to liquid water in the bathrooms. To our knowledge, the microbial occurrence in this type of environment has not previously been investigated.. © The Authors.

During the last decade, the use of timber (especially massive timber) has increased worldwide, mainly driven by anticipated environmental benefits. However, there is debate on how to handle the susceptibility against microbial growth for wooden constructions, especially during the construction phase. Sometimes full weather protection is used to avoid exposing the wooden material to outdoor conditions, but oftentimes the structures are fully exposed to precipitation. In an earlier study, one construction site using a full weather protection was studied, and the results showed promising results on the improved hygrothermal conditions and reduced risk of mould growth. Moreover, the site contractor also indicated improved work environment and productivity, however, this was not included in that study. This present study aims to investigate the effects of using full weather protection during construction in seven different construction projects to follow-up and broaden the earlier single project study. The studied aspects include the hygrothermal conditions, potential of mould growth, and influence on the work environment. Temperature and relative humidity were measured and analysed. Samples of cross-laminated timber (CLT) were analysed using a microscope, and the results are compared to theoretical mould growth potential. This is measured both inside the weather protection and outside at the seven construction projects. Furthermore, a work environment questionnaire is distributed to workers at the sites to collect the perceived work environment using a full weather protection. The results of the study partly confirm the conclusions from the earlier study, i.e., reducing the risk of mould growth and causing a slightly warmer and dryer conditions than outside. In addition, the results indicate an improved work environment. The majority of the interviewees wishes a weather protection in their next project regarding the work environment.

While the construction sector embraces digitalization, new technologies related to it are spreading benefits. The need of creating a 3D model of a building, a digital copy of something existing, is not new. Mediated by the advent of photographic and laser instrumentation, the construction of a digital model has crossed the fields of surveying with increasing accuracy and precision, imposing standards of capturing the existing first and modelling then ever higher. But while the Building Information Modelling allows a virtual representation of the existing asset enriching its geometry with precious and significant information related to its properties, advanced survey has always faced the impossibility to break the surface of the building, surveying what is inside walls, thus excluding what necessary should be contained within a BIM model. Also, BIM models do not consider the real-time component and do not report the real-time behaviour of the building. In this chapter we will investigate several technologies and instruments exploited till now for the surveying and positioning of existing buildings, plants included, and a new toolkit based on AR that, coupled with sensors and visualisation tools developed by BIM4EEB, offers many advantages when surveying the whole building. © 2022, The Author(s).

Kvalitetsklassning av sågtimmer vid stockmätning görs idag manuellt eller semi-automatiskt med hjälp av mätramar och röntgensystem. Automatisering av detta steg kan leda till en effektivare process och en jämnare kvalitet. En del nedklassningsorsaker som idag bedöms manuellt bör kunna detekteras med hjälp av bildigenkänning, vilket kan fungera som ett komplement till de system som används idag för att ta ett steg närmare till en helautomatisk kvalitetsbedömning av sågtimmer. Vi har monterat kameror vid mätstationen på Holmens sågverk i Bygdsiljum och samlat in högupplöst video på stockar. Stillbilder från det insamlade videomaterialet har plockats ut och stockar, trädslag och defekter har markerats i bilderna. De annoterade bilderna har använts för att träna objektdetektionsmodeller som har bistått i arbetet att annotera fler bilder i flera iterationer.

I projektet har hantering av mätdata och recept undersökts för att se hur en standardisering av utformning och hantering skulle effektivisera och förenkla komplexiteten i processerna. En kartläggning av nuvarande hantering av mätdata och recept har gjorts. Formatet på dessa mät-data varierar i stor utsträckning och är leverantörsberoende. Variationen i formatet av mätdata och hur denna kommuniceras mellan delprocesser försvårar smidigt byte av delprocesser i uppgraderingar och effektiviseringsarbeten. En standardisering för att likrikta dessa format och dataflöden har visat sig vara önskvärt för att förbättra anpassningsförmågan för framtiden. Vilken typ av standardiseringsform som vore optimal för branschen har också undersökts och kommit fram till att en av branschen allmänt accepterande standard likt StandforD-standar-den vore bättre än att införa en tvingande standard.

The IRIS project has defined goals and targets in the project proposal, and the monitoring and evaluation work package (WP) 9 will analyse to what extent the project reaches these goals and objectives. The monitoring and evaluation will also provide information concerning the performance of the different solutions demonstrated in the Lighthouse (LH) cities in IRIS which is important for the replication of the solutions both in the LH cities and in other cities. This is of importance for the replicability of the solutions, both in the LH cities (Utrecht, Nice and Gothenburg) and in other cities. The project consists of several demonstration projects which are divided by 5 transition tracks (TTs): TT1; Smart renewables and closed- loop energy positive districts, TT2; Smart Energy Management and Storage for Grid Flexibility, TT3; Smart e-Mobility Sector, TT4; City Innovation Platform (CIP) Use Cases, TT5; Citizen engagement and co-creation.

D9.5 is the result of 2 years of work with several iterative processes involving the LH cities and their partners with the ultimate goal to:

Define a set of Key Performance Indicators (KPIs) which evaluate the effectiveness and impact of the cities proposed measures.Setup monitoring plans for each IS to define how each parameter is being measured to ensure that the KPIs can be calculated.Define how the baseline and the targets are defined and measured.This work started as described in D9.2 (Report on monitoring and evaluation schemes for integrated solutions) [1] with:The definition of the initial list of KPIs and how to calculate them, based on Smart Cities Information System (SCIS) [2], the CITYKeys Project [3] and the IRIS project itself .The assignment of KPIs to relevant measures within the project.An evaluation plan to measure performance on project level, including aggregation of KPIs.

The process has continued with D9.3 (Report on data model and management plan for integrated solutions) [4] and D9.4 (Report on unified framework for harmonized data gathering, analysis and reporting) [5], which define the basis of the methodologies used to come to the results written in this report.

Feedback from several workshops on this topic has led to a guideline that supports the partners responsible for implementation of the demonstrators in setting up their projects such that:KPIs that are being measured are well understood.KPIs give a meaningful result.The right data is being measured to calculate the required KPIs during the implementation of the measures.

An important part of this process is to have a close look at the KPIs that are projected for each demonstrator, the calculation method of the KPIs, and the expected results. By means of KPI interpretation forms. By doing so:

• KPIs are defined and calculated such that only one way of interpretation is possible. This way results from different projects and cities are homogenized.

• It is well understood what result the measurement of a KPI leads to.The method and results of this process are described in this report, which is a revised KPI list where KPIs are added, removed or adapted.

In addition to this, the KPI interpretation forms created the basis for the formulation of detailed monitoring plans for all measures within the project. Together with template forms for reporting these plans and a common data structure, which were provided to the affiliated partners, these plans are obtained and described for all measures per Transition Track and per Lighthouse city in this report.

Another essential part of measuring the performance of the IRIS project is the establishment of the baseline measurements and review if targets are met. Tables with KPI data requirements, consisting of the associated parameters, data sources, baseline and (possible) targets for all measures are incorporated.

An important part of the monitoring strategy of the IRIS project is the KPI tool, which is described in detail in report D9.4 [5]. This tool is established to collect all relevant monitoring data from the IRIS project in order to calculate and visualize the performance of the project. The tool partly obtains it’s data by means of the City Information Platforms (CIP). The monitoring details combined with the updated KPIs, result in an inventory containing an overview of all data sources with as main objective:

• To make sure that all data sources are known and will be measured by the responsible partners.

• To know what kind of data needs to be collected by the KPI tool.

• To know when monitoring in each demonstrator starts and data can be expected.

• To have a clear overview for all responsible partners what to deliver.

Besides setting up the collection of the indicators data, D9.5 also continues the work on aggregation of KPIs. For each city a revised list is made that indicates which KPIs will be aggregated to Transition Track-, City- and IRIS-level.

In the conclusion the challenges that where met during the process of setting up the monitoring framework are described. Because of delays within the IRIS project, not all monitoring plans have been obtained yet. Therefore, a future update of this report will be submitted as soon as this information is available. Further on a perspective is described for future work to start gathering the data and visualize results of the IRIS project.

The target group for this report is mainly people who:

-  Are interested in how to apply a unified monitoring and evaluation scheme into a large Smart City project with many different partners and stakeholders. For example, people working on comparable (Smart City) projects, or the follower cities within the IRIS project.

-  Are interested in how the performance of several different Smart city projects can be evaluated.

-  Are interested in the implementation of KPIs from projects such as SCIS and CITYkeys.

-  Want to learn from project partners from within the IRIS project who work on similar projectsabout their monitoring. For example, partners from different cities affiliated with the same transition track or transition track leaders.

- Want to find out what kind of data can be expected from the IRIS project. For example, external researchers interested in the results of Smart City projects, but also partners working on WP4 (CIP) and WP9 (monitoring and evaluation).Want to learn what the current state is of the monitoring and evaluation of the IRIS project.

The present document is the Deliverable D9.6 “Intermediate report after one year of measurement”. The document describes the work carried out within the task 9.5 entitled “Overall evaluation and impact analysis for impact enhancement”. The focus of this task is to provide intermediate results of the demonstration activities in the three Lighthouse (LH) cities and to present the data currently transferred to the IRIS Key Performance Indicators (KPI) tool.

The deliverable D9.6 is based on the work done in the Work Package (WP) 9, in particular the work in task 9.4 and task 9.5 (presented previously in D9.4 and D9.5). In this deliverable, the monitoring framework and established baselines developed in D9.5 are used to collect the data needed for the calculation of the KPIs. The KPIs are in turn used to evaluate the outcome and impact of the implemented measures. The collected data is transferred to the KPI tool, which was created and presented in D9.4. The tool processes and calculates the KPIs and visualizes the results. Data can be transferred to the KPI tool automatically, through a CIP, or manually through a template. A process which is described in this deliverable.

This deliverable was intended to be an intermediate report to provide an initial insight to the results for all measures in the IRIS project. However, due to the lack of data from measures, which in part is due to the Covid-19 pandemic, this report focuses more on providing information about the process of collecting data and transferring it into the KPI tool. This process is collaborative and has been carried out within the IRIS LH cites with support from the technical partners and the WP9 team. Complexity of APIs and the lack of standards have made data extraction and transfer into the KPI tool more difficult. Furthermore, not all measures in IRIS are connected to CIP which means that manual data collection was required and a systematic procedure for this collection needed to be developed and introduced to the partners.

There are several different reasons for lack of data and the resulting exclusion of some measures from this deliverable. A few measures are not yet in operation, while for other data collection have not started or the data transfer to the KPI tool has not been established yet. However, the work done in task 9.5 has provided new knowledge on issues and errors that can occur in the process of transferring data and establishing KPIs. Through dialogues with the project partners, the need to clarify some KPI cards with i.e. units, formulas or use cases has been highlighted. The close cooperation with the project partners has led to continued work on the definitions of the KPIs and what KPIs to include, taking steps in the direction of clearer interpretation and more consistent use. Further adaptation of several KPI-cards was done by the WP9 team. In the process of adjusting KPIs, the effect these adjustments would have on all measures that use them were considered. The process of developing KPIs involves a balance between finding indicators that can be used more generally and indicators that are more specific and thus better capture the purpose of a specific measure.

The improvements of KPIs and lessons learned in task 9.5 will be of great use in the continued work of WP9. Focus will be on transfer of data from all measures into the KPI tool. A continuous dialogue with responsible project partners to ensure this data transfer and discussions on deviation and errors in the initial results will be established.

The scope of this document is to provide the procedure to be adopted by the project partners and subcontractors to produce, collect and process the data from the IRIS demonstration activities. The adopted procedure follows the guidelines provided by the European Commission in the document Guidelines on FAIR Data Management in Horizon 2020.

This document is based on the Horizon 2020 FAIR Data Management Plan (DMP) template (Version: 26 July 2016) [1], which provides a set of questions that the partners should answer. Furthermore, the Horizon 2020 template from DMP online [2] is utilized to expand the questions and provide more detailed explanations. This fourth report on DMP, submitted at M48 (Autumn 2021) of the project, describes a plan for data production, collection and processing, and the first input from the different lighthouse cities. It will be continuously updated until the end of the project, as part of work package 9, WP9 Monitoring and evaluation, activities. Specifically, DMP will be updated again in M60 (D9.11: Fourth and final update on the Data management plan).

The development of the DMP is part of the work undertaken in T9.2 Defining the data model and the data management plan for performance and impact measurement (M4-M60). Since the DMP development started in M4 (spring of 2018) of the project, this third report of the DMP provides templates for data reporting and emphasises on the interactions of task 9.2, T9.2 Defining the data model and the data management plan for performance and impact measurement, with other work packages.

An important part of this document is the data management template (DMP template). This template is supposed to be used by all partners who produce or handle datasets within the IRIS project. For example, the partners responsible for the implementation of the measures in the Lighthouse cities. By making use of this template, it is ensured that the project research data will be 'FAIR', that is findable, accessible, interoperable and re-usable. This is achieved by:

• Making data Findable, including provisions for metadata
• Making data openly Accessible
• Making data Interoperable
• Increase data Re-use (through clarifying licences)

The template is accompanied by a chapter which describes all topics that are required to be filled in. Further on, 3 DMP examples are added to illustrate what is expected, in order to facilitate the task of providing the data.

Besides the Ethical aspects as defined in the DMP template for all ‘sub’-projects, a separated chapter is written on these aspects on IRIS level.

The aggregation of data within the IRIS project has started after M30. Which means that data was generated within several measures. For this reason, the template as presented in D9.9 could be filled in as far as possible for 27 datasets. The resulting information about these datasets can be found in the DMP Excel sheet on EMDESK and as tables in Appendix 0.

The scope of this document is to provide the procedure to be adopted by the project partners and subcontractors to produce, collect and process the data from the IRIS demonstration activities. The adopted procedure follows the guidelines provided by the European Commission in the document Guidelines on FAIR Data Management in Horizon 2020.

This document is based on the Horizon 2020 FAIR Data Management Plan (DMP) template (Version: 26 July 2016) [1], which provides a set of questions that the partners should answer. Furthermore, the Horizon 2020 template from DMP online [2] is utilized to expand the questions and provide more detailed explanations. This third report on DMP, submitted at M30 (spring 2020) of the project, describes a plan for data production, collection and processing, and will be continuously updated until the end of the project, as part of work package 9, WP9 Monitoring and evaluation, activities. Specifically, the DMP will be updated again in M42 (D9.10: Third update on the Data management plan), and in M60 (D9.11: Fourth and final update on the Data management plan).

The development of the DMP is part of the work undertaken in T9.2 Defining the data model and the data management plan for performance and impact measurement (M4-M60). Since the DMP development started in M4 (spring of 2018) of the project, this third report of the DMP provides templates for data reporting and emphasises on the interactions of task 9.2, T9.2 Defining the data model and the data management plan for performance and impact measurement, with other work packages.

An important part of this document is the data management template (DMP). This template is supposed to be used by all partners who produce or handle datasets within the IRIS project. For example the partners responsible for the implementation of the measures in the Lighthouse cities. By making use of this template, it is ensured that the project research data will be 'FAIR', that is findable, accessible, interoperable and re-usable. This is achieved by:

• Making data Findable, including provisions for metadata
• Making data openly Accessible
• Making data Interoperable
• Increase data Re-use (through clarifying licences)

The template is accompanied by a chapter which describes all topics that are required to be filled in. Further on, 3 DMP examples are added to illustrate what is expected, in order to facilitate the task of providing the data.

Besides the Ethical aspects as defined in the DMP template for al ‘sub’-projects, a separated chapter is written on these aspects on IRIS level.

After M30 the aggregation of data in the IRIS project will start to take place. Meaning that D9.10 (the third update of the data management plan) will be a version where the templates presented in this document will be largely filled in. Further on D9.10 will include the final template of data collection, which will be mainly defined by the experience built up during the collection of data during the project.

Buildings play a significant role in global carbon emissions, and offer substantial potential for energy savings and emission reduction. This research delves into the Emission Factor Discrepancy (EFD)—the variance in CO2 emission reduction projections obtained by employing either annual or hourly average Emission Factor (EF) for electricity generation. Through two detailed case studies in the Netherlands and incorporating emission data from the Netherlands, Sweden, and France, the study uncovers the potential magnitude and country-specific variability of the EFD. By demonstrating how the energy mix of a country influences the EFD, the research offers valuable insights into the accuracy of emission calculations for different circumstances, particularly in the context of transitioning to renewable energy sources. We have found that countries with energy sources having low load-following capability and low EFs exhibit a large EFD. Whereas, countries with high EFs and large deployment of Photovoltaics (PV) show a notably large EFD on emission reduction related to PV production. This highlights the importance of carefully selecting EFs when evaluating building retrofits in the context of smart city initiatives. This research highlights the need for establishing a uniform framework for calculating carbon emissions associated with retrofitting in buildings in conjunction with the granularity of data and the specific energy mix of a country. 

Tall timber buildings generally require fire resistance ratings of 90 minutes, 120 minutes or more. The vast majority of fire tested structural timber connections, however, did not reach a fire resistance that was relevant for these buildings. Commonly timber connections between glued laminated timber members comprise of exposed steel fasteners, such as bolts, screws, nails and dowels. However, it has previously been concluded that connections with exposed steel fasteners, generally do not achieve fire resistance ratings of 30 minutes and are, therefore, inadequate to be implemented in tall timber buildings without fire encapsulation. The research project presented in this report consists of four connection fire tests that are designed to achieve structural fire resistance ratings of 90 minutes, using different design strategies. This goal was achieved for all tested column-beam connections. A single test of a moment resisting connection did not lead to a fire resistance rating of 90 minutes, due to timber failure at the smallest cross-section after 86 minutes. The low temperature of the steel fasteners and the limited rotation of the connection, however, suggest that the connection would have been capable of achieving a 90 minutes fire resistance rating if larger beam cross-sections would be used.

Bioeconomy helps to move towards a renewable, fossil-free future. The environmental impact is significantly reduced when replacing fossil-based products with bio-based alternatives. In a bioeconomy, all products are made from renewable and biogenic resources. In the building sector examples for biogenic sources are traditionally wooden building structures, while green roofs are becoming more popular. The goal of the present project was to assess the amount of biogenic carbon stored in green roofs and wooden buildings overall. The question is whether green roofs are improving the biogenic carbon usage of buildings and find out how that can be improved. The methods used are based on construction modelling, life cycle assessment and standardised environmental product declaration (EPD). The results indicate that wooden building structures are not enough for a complete biogenic building to move to a renewable, fossil-free future. Furthermore, the green roofs do add more biogenic carbon to the building than conventional roofs, while seen over the whole building these benefits are negligible. The results are presented as renewable and nonrenewable energy as well as biogenic carbon and greenhouse gas emissions. These are compared with conventional roofing based on non-renewable standard roofs in Sweden.

Industrial drying of sawn timber is a process driven by a difference in moisture content (MC) between the core and the surface as moisture moves from the wet inner region towards the drier surface. After drying, the timber surface is always drier than its core, and stresses have developed within the wood volume. If the timber is to be further processed, these stresses and the moisture gradient need to be reduced to avoid unwanted distortion, i.e. the timber needs to be conditioned. Conditioning is usually accomplished by exposing the timber to a hot and humid climate after the drying regime. The conditioning regime is essential for timber quality, and it is energy and time consuming; therefore of interest for optimisation. This research was a case study where for the first time the MC during conditioning was studied in an X-ray computed tomography (CT) scanner. The aim was to test a previously developed algorithm and investigate the influence of MC and heartwood-sapwood proportion on the effectivity of the moisture equalisation in 30 mm thick Scots pine boards. The MC was estimated from CT data acquired during the drying and conditioning of the boards in a lab-scale kiln adapted to a medical CT scanner. Results show that the algorithm can provide relevant data of internal MC distribution of sawn timber at the pixel level. Furthermore, for the drying schedules studied, the conditioning at low MC (8%) does not need to be longer than 3 h, while higher MC (18%) requires a longer conditioning.

This report is a state-of-the-art on timber construction in selected european countries and and discusses technical premises for a potential circular use of timber in building construction, focusing on Design for Deconstruction and Reuse (DfDR) in low-rise timber buildings, up to 3 storeys. It describes the historic and contemporary building techniques of timber buildings in all project countries (Sweden, Finland, Ireland, UK, Spain, Germany, Slovenia) and finds, that all of these countries have a long history of building with timber, but in most regions other materials dominated the housing output from the beginning of the 20th century. Only in the second half of the 20th century timber started gaining importance as a building material in Europe again, with light timber frame construction becoming an important construction system. From the beginning of the 21st century, innovations in the sector started transforming the construction industry. Mass timber products like CLT opened the market for high-rise timber buildings and in some countries office blocks, schools and hotels are built using timber, although the majority of timber construction remains residential. An even more important development might be the uptake of offsite construction, that makes timber construction more accurate, material efficient, fast and it reduces waste. These modern methods of construction are gaining importance in the construction sector of all partner countries and are likely to dominate the European housing output in the future. There will be some regional differences in the level of prefabrication, material choices and designs, so that any design guidelines for DfDR need to be adapted to the regional context. However, modern timber construction is not currently aligned with circular economy principles and is seldomly taking buildings endof-life-into account.

Therefore, the report continues to summarise novel design concepts for deconstruction and reuse, that could be used in modern timber buildings. It outlines that the feasibility as well as the reuse potential depends on the scale of reclaimed components, where larger components and assemblies are often considered beneficial in terms of time, greenhouse gas emissions and waste production. If volumetric or planar units could be salvaged in the future, they also need to be adaptable for altered regulations or standards or alternative functions. It is further necessary that assemblies can be altered within buildings, since different building components have different life expectancies. Various examples for DfDR in buildings with the accompanying design strategies are presented. The buildings in the examples are often designed to be in one place for a limited timeframe and can be deconstructed and re-erected elsewhere without replacement of components. Key-features often include modularity of components, reversible connections, adaptability of the floor-plan and circular procurement. Even though it is evidently possible, the structural reuse of timber is not a wide-spread approach to date. Barriers to the use of reclaimed structural components are mainly a lack in demand for salvaged materials, but also prohibitive building regulations and the lack of design standards. Demolition practices play a crucial role as well and need to be considered in the design of buildings, to avoid damage to the components.

Finally, the report summarises principles and guidelines for DfDR by different authors. As a generic approach an indicator system for deconstructability and reusability could be introduced. Time, Separability, Risk and Safety, Simplicity and Interchangeability are identified5as the main indicators for DfDR, that remain somewhat abstract. As opposed to using a generic indicator system, a more practical approach of assessing DfDR on an individual basis could be taken. This way specific shortcomings of the design can be addressed. But if DfDR found a wider application in the future, this approach may be too time consuming and there is a need for a more directed decision-making tool that can be used during the design phase of buildings to enhance DfDR. As the InFutUReWood project proceeds, it will examine a more granular approach to DfDR, relating it to the actual construction stages used in practice, developing a general template to be appropriated and adjusted to account for regional variations in construction. A strategic matrix is in development which will provide designers with a methodology based on relating principles, strategies and specific tactics to the typical design stages, to aid design decisions that promote DfDR.

This paper presents the results of an experimental study conducted on multiple-shear joints consisting of gusset plates made of either LVL or plywood connected to the timber members by means of full-threaded self-tapping screw. Both hardwood and softwood timber based gusset plates with different thickness and face grain orientations were investigated. The results show that this type of connection has an excellent structural performance, with not very dissimilar strength from that of comparable connections which makes use of slotted-in steel plates and dowels. It is believed, therefore, that the proposed solution can be a valid alternative to the more traditional timber connection with slotted-in steel plates and dowels.