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    Structural Properties of Autoclaved Aerated Concrete Masonry

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    Autoclaved aerated concrete masonry units are manufactured from Portland cement, quartz sand, water, lime, gypsum and a gas forming agent. The units are steam cured under pressure in an autoclave transforming the material into a hard calcium silicate. The autoclaved aerated concrete masonry units are large-size solid rectangular prisms which are laid using thin-bed mortar layers into masonry assemblages. The system and product are not new - patented in 1924 by Swedish architect Johan Eriksson. Over a period of 60 years this product has been used in all areas of residential and industrial construction and in virtually all climates. However, the principal locations of application have been generally outside the U.S. Little information in the U.S. is available on the structural properties of this product. Due to the interest in use of this product in the construction industry and the construction of production plants in the U.S., the Construction Research Center at the University of Texas at Arlington and Robert L. Nelson & Associates conducted a series of tests to determine some of the basic structural properties of this product. This paper presents the findings of those investigations.


    masonry units, masonry assemblages, autoclaved aerated concrete masonry, thin bed mortar

    Author Information:

    Matthys, JH
    Professor, Construction Research Center, University of Texas at Arlington, Arlington, TX

    Nelson, RL
    President, Robert L. Nelson, & Associates, Schaumburg, IL

    Committee/Subcommittee: C01.11

    DOI: 10.1520/STP14198S