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  • 1. Miccoli, Lorenzo
    et al.
    Fontana, Patrick
    Mechanical characterization and modelling of earth block masonry2012In: Masonry, ISSN 1432-3427, E-ISSN 1437-1022, Vol. 16, no 6, p. 279-292Article in journal (Other academic)
    Abstract [de]

    Knowledge of the material properties and failure mechanisms of earthen materials is limited and scattered. Within the framework of the NIKER project (www.niker.eu) funded by EC, the mechanical properties of earthen material elements were therefore determined under static compression and shear loads. The aim was to obtain fundamental data on deformation behaviour and failure mechanisms of earthen material structural elements and to describe them by means of a numerical model. The test results confirmed the brittle behaviour of earth block masonry under monoaxial compressive load and showed that the failure of earth block masonry under shear load occurs by sliding of the earth blocks along the mortar joints after initial cracking in mortar joints and earth block. Numerical macro modelling showed satisfying results with regard to stress-strain behaviour, but the simulated crack pattern was not consistent with experimental observations. In the case of earth block masonry, it is thus necessary to use micro modelling approaches in order to correctly predict the failure process at local level.

  • 2. Miccoli, Lorenzo
    et al.
    Fontana, Patrick
    RISE - Research Institutes of Sweden, Built Environment, CBI Swedish Cement and Concrete Research Institute.
    Ziegert, Christof
    Perrone, Chiara
    Mueller, Urs
    RISE - Research Institutes of Sweden, Built Environment, CBI Swedish Cement and Concrete Research Institute.
    Charakterisierung und Modellierung der mechanischen Eigenschaften von Lehmsteinmauerwerk - Mechanical Characterization and Modelling of Earth Block Masonry2012In: Masonry, ISSN 1432-3427, E-ISSN 1437-1022, Vol. 16, no 6, p. 279-292Article in journal (Refereed)
  • 3.
    Mueller, Urs
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, CBI Betonginstitutet AB.
    Ziegert, C
    Eigenschaften industrieller lehmbauprodukte für den mauerwerksbau und verhalten von lehmsteinmauerwerk2012In: Masonry, ISSN 1432-3427, E-ISSN 1437-1022, Vol. 16, no 1, p. 17-28Article in journal (Other academic)
    Abstract [de]

    Properties of industrially produced earthen building products for masonry and behaviour of earth block masonry. The contribution gives an overview of the properties of industrially produced earthen building products for masonry. In the meantime the quality of the industrial production of this group of building materials reached a level similar to that of other products for construction. Earth plasters exist as plasters for universal, one or multi layer applications or as lower, upper or finish plasters. Earth blocks are provided in different sizes and with different perforations. The mechanical properties of different earth block types are signified by compressive strength of up to 11 N/mm2 but are typically in a range between 2 and 5 N/mm2. A critical point is the correlation of the strength of earthen materials with their moisture content. Results from earth blocks showed that in a relative humidity window between 40 and 70 % rh the compressive strength of earth blocks is fairly constant. Masonry made from earth block and earth mortar exhibited compressive strength and elastic modules similar to masonry made with aerated autoclaved concrete blocks. The shear strength of earth block masonry, however, is fairly low, due to the weak bond between earth block and earth mortar.

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