Evaluation Of Thermal Resistance Of Autoclaved Aerated Concrete (aac) Masonry Systems

摘要

Autoclaved aerated concrete (AAC) is an innovative material introduced into the United States market in the 1990s.AAC was created and patented by Johan Axel Er-iksson in 1924,and in 1928 Karl August Carlen licensed and began manufacturing AAC [Matthys and Barnett (2004)].AAC is a lightweight cellular material composed of portland cement,lime,water and finely ground sand.The raw materials are mixed into a slurry and an expansive agent such as aluminum powder is added to the material causing macroscopic voids to form,resulting in a final volume of two to three times the slurry volume.The result-ing cellular structure has high thermal efficiency which is the basis for this study (Figure 1).AAC elements are used in masonry blocks and pre-cast panel construction.Benefits of AAC include excellent fire resistance,low sound transmission and reduced environmental impacts by reusing waste materials.