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detailed bibliography of almost 500 references on AAC (RILEM, 1983). At that
time, the need was recognized for evaluating the experimental data and theoretical
studies that had been collected throughout Europe.
At the RILEM General Council meeting held in Mexico City in September
1982, Technical Committee 78-MCA (Model Codes for AAC based on RILEM
Test Methods) was set up. Another RILEM Technical Committee, 51-ALC (Test
Methods for Autoclaved Lightweight Concrete), was already active preparing
recommendations for test methods to characterize relevant properties of AAC. In
many European countries, national standards and recommendations on selected
topics already existed in 1982. For this reason RILEM Technical Committee 78-
MCA started his work collecting and comparing existing standards from eighteen
different countries, and published a working document in 1984 (RILEM, 1984).
In 1993, RILEM Technical Committees 78-MCA and 51-ALC published
the first edition of “Autoclaved Aerated Concrete: Properties, Testing, and
Design”- RILEM Recommended Practice (RILEM, 1993). That document was
prepared as a European model code, is used throughout Europe and Asia, and is
cited as a key reference in research studies conducted in the University of
Alabama at Birmingham and the University of Texas at Austin.
1.3 SCOPE OF WORK
As AAC products were introduced in the United States, it became clear
that there was a need for methods of test and design provisions compatible with
US material specifications, design codes and construction practices for masonry
and reinforced concrete.
3