AAC blocks is porous concrete with tobermorite cellular structure. It contains 80% Air and 20% solids by volume. This makes AAC blocks lightweight building material for wall construction. Due to this feature-porosity other features comes hand in hand. Like it can be cast in larger shape still doesn’t bring much pain in handling. And construction becomes faster. Porous structure not only brings thermal insulation feature but also sound insulation, seepage resistance. As in table following proportion of raw material are used along with water in manufacturing of lightweight blocks.