We also manufacture broken AAC blocks called AAC rubble.Being a normally cured cement based product, it continues to gain strength with time so long as some moisture is available in the environment, requiring little maintenance. This is unlike other filling materials like coal which deteriorate with time. Filling with AAC blocks have proven to withstand all types of weather conditions. It does not produce any pollutants or toxic substances during its manufacture. It provides 4 hours of fire endurance.