Evaluating shear test methods for stabilised rammed earth


Cheah, J. S. J., Walker, P., Heath, A. and Morgan, T. K. K. B., 2012. Evaluating shear test methods for stabilised rammed earth. Proceedings of Institution of Civil Engineers, Construction Materials, 165 (6), pp. 325-334.

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    Rammed earth is an accessible, sustainable, and increasingly popular building material. Due to a lack of research, current design standards for rammed earth have taken a conservative stance on material attributes like shear strength. Evaluating the shear strength of rammed earth is particularly important in seismic areas due to the material's high mass, low ductility, and propensity to fail in shear. Shear test methods designed for other materials have typically been used in practice to determine the shear strength of rammed earth. In this research the design shear strength guidance available in current earth building standards was compared with experimental shear strength results for stabilised rammed earth. The triaxial (geotechnical) and triplet (masonry) tests were used to evaluate specimens reinforced with natural fibres; Sisal and New Zealand flax. Both shear test methods showed that the shear strength capacity of cement stabilised rammed earth was greater than the current guidance provided in the earth building standards. Recommendations were made to use the triaxial test to evaluate the shear strength of stabilised rammed earth and to allow the use of a lower bound shear strength in design equal to 7% of the compressive strength.


    Item Type Articles
    CreatorsCheah, J. S. J., Walker, P., Heath, A. and Morgan, T. K. K. B.
    Related URLs
    URLURL Type
    Uncontrolled Keywordscodes of practice & standards,structures & design,buildings,strength and testing of materials
    DepartmentsFaculty of Engineering & Design > Architecture & Civil Engineering
    Research CentresBRE Centre in Innovative Construction Materials
    Publisher Statementcoma165_325.pdf: Permission is granted by ICE Publishing to print one copy for personal use. Any other use of these PDF files is subject to reprint fees.
    ID Code25429


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