Physical and Mechanical Properties of Autoclaved Aerated Concrete (AAC) Used in the Building Wall System: A Review

Autoclaved aerated concrete (AAC) is an innovative, high quality and excellent building material, which is a sustainable replacement to the red clay bricks in the building construction. The strength of AAC depends on the quality and quantity of raw materials as well as on processing and curing procedures. Considerable research has been carried out on estimating the structural properties of AAC by experimental methods; a few theoretical models have also been proposed. This paper presents a review on aspects related to the physical and mechanical properties of AAC used in a building wall system. A number of experimental studies are described. The correlations between various relevant physical and mechanical properties of AAC are also described. A comparison of respective properties of AAC with those of clay brick is presented. Based on the review, some challenging issues and key areas of research are identified.