Laboratory scale testing of extruded earth masonry units


Maskell, D., Heath, A. and Walker, P., 2013. Laboratory scale testing of extruded earth masonry units. Materials & Design, 45, pp. 359-364.

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    There has been a resurgence in use of earth as a construction material largely driven by environmental concerns. Extruded earth masonry is a method of earth brick production that utilises existing fired brick manufacturing techniques. Extruded earth has distinct physical characteristics compared to other earthen building techniques. As industrial scale extrusion trials require large volumes of material, laboratory scale material development relies on samples prepared using alternative forming methods, such as moulding and compaction, which do not reliably reproduce the full-scale manufacturing process. The paper presents a representative method of manufacturing small scale extruded earth bricks. A suitable testing methodology is proposed, with varying curing conditions investigated. The small scale bricks are compared against equivalent large scale unfired earth bricks. The small scale bricks achieved a compressive strength of 3.39MPa and with a corrected difference com[pared to the full scale bricks of 0.07MPa; were found to be a reliable basis for laboratory scale investigation of material performance. The relationship that describes the effect of moisture content on strength exists for both small and large scale bricks.


    Item Type Articles
    CreatorsMaskell, D., Heath, A. and Walker, P.
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    URLURL Type
    Uncontrolled Keywordsmasonry,earth construction,compressive strength testing,size effect
    DepartmentsFaculty of Engineering & Design > Architecture & Civil Engineering
    Research CentresBRE Centre in Innovative Construction Materials
    Publisher StatementLaboratory_Scale_Testing_of_Extruded_Earth_Masonry_Units.pdf: NOTICE: this is the author’s version of a work that was accepted for publication in Materials & Design. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Materials & Design, vol 45, 2013, DOI: 10.1016/j.matdes.2012.09.008
    ID Code31868


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