Size 625 x 240 x 100mm Shape Rectangular Brand Insta Block Material Autoclaved Aerated Concrete Usage/Application Partition Walls Product Type Blocks Brick/Block Color Gray Compressive Strength Min 4 N/mm2 Precision in Size +/- 5mm Dry Density 550 to 650 kg/m3 Fire Resistance 2 to 6 hours Thermal Conductivity 0.16 W/m-K Drying Shrinkage 0.04% We are offering 625 x 240 x 100mm AAC Block to our clients. Other Details: Consists of 70% of air Combines silica (sand or recycled fly ash) cement, lime, water and aluminum powder (expansion agent), paved into a mould Aluminum powder reacts with silica when added to concrete, resulting in the formation of millions of microscopic hydrogen bubbles Hydrogen bubbles cause the concrete to expand to roughly five times its original volume Hydrogen evaporates leaving a highly closed cell aerated concrete Thereafter, they are cut and finally steam and pressure cured in an autoclave