Autoclaved aerated concrete (AAC) blocks are widely used as a walling material in construction sector in Turkey. They are produced from the mixture of chemically suitable raw materials with water. Prepared slurry is poured into the metallic molds and left to expand and for hardening process in curing area. Thereafter, expended mud, called a cake, is sent to the autoclave stage.This stage is one of the most important process involved in the crystalline structure forming of AAC products. Furthermore, development of mechanical properties of AAC blocks is also strictly related to the conditions of those process. In this study, the effects of different autoclaving pressure and curing time on the mechanical properties of AAC products were investigated to increase production capacity and to save energy by optimizing these parameters. At the first stage, sized specimens were cured in autoclave under varied pressures between 5.5 and 12 bars at different period in a laboratory scale autoclave to determine optimum curing conditions for the samples of G2/350 and G2/400. Before using laboratory scale autoclave, the correlation coefficient between laboratory and industrial one was determined by producing samples from each group.According to the experimental results, the autoclaving process using 10 bars and 5.5 h could be recommended to obtain the best suitable products (for both crystalline structure and mechanical performance) for all groups of AAC blocks. The compressive strength of the specimens were 2.6 and 2.7 MPa for G2/350 and G2/400, respectively when compared with standard one (2.5 MPa) produced under 12 bars and 5.5 h. It is also concluded from this experimental study that the production pressure can be reduced from 12 to 10 bars although all the technical properties of experimental samples remain the same. K E Y W O R D SAAC, autoclaving process, crystalline structure, curing conditions, curing pressure