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Redistribution of chlorides in concrete specimens occurring during storage
RISE Research Institutes of Sweden, Built Environment, Infrastructure and concrete technology.ORCID iD: 0000-0002-0230-2200
2021 (English)In: Materials and Structures, ISSN 1359-5997, E-ISSN 1871-6873, Vol. 54, no 3, article id 105Article in journal (Refereed) Published
Abstract [en]

It has been observed that storage of specimens with chloride gradients before determining the chloride profile can lead to changes in the shape of the chloride profile. An experimental study to quantify the influence of the duration of the storage period and the storage temperature has been carried out. It comprised three storage periods (7, 28 and 91 days) and two storage temperatures (+ 5 °C and + 20 °C). The specimens had previously been immersed in a 15% NaCl solution for 56 days and were sealed in plastics during storage. The results show that a temperature of + 5 °C diminishes the rate of redistribution considerably, compared to a storage carried out at + 20 °C, and the longer the storage period is, the more redistribution will take place. It is also shown that it is of importance to assure that the sealing of the specimens during storage is capable of maintaining the relative humidity at the surface, so that local redistribution of chlorides close to the surface will not take place. © 2021, The Author(s).

Place, publisher, year, edition, pages
Springer Science and Business Media B.V. , 2021. Vol. 54, no 3, article id 105
Keywords [en]
Chloride concentration, Chloride content, Chloride ingress, Chloride profile, Concrete, Redistribution, Sodium chloride, Chloride profiles, Concrete specimens, NaCl solution, Storage periods, Storage temperatures, Concretes
National Category
Building Technologies
Identifiers
URN: urn:nbn:se:ri:diva-53045DOI: 10.1617/s11527-021-01704-yScopus ID: 2-s2.0-85104889475OAI: oai:DiVA.org:ri-53045DiVA, id: diva2:1557253
Note

 Funding text 1: Open access funding provided by RISE Research Institutes of Sweden. This study was financed by RISE, with no external funding.

Available from: 2021-05-25 Created: 2021-05-25 Last updated: 2023-05-16Bibliographically approved

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Helsing, Elisabeth

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