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Compare AAC with CLC

Parameters Autoclaved Aerated Concrete Blocks Cellular Lightweight Concrete Blocks Burnt Clay Bricks
Basic raw materials & other inputs Cement, Fly Ash & Acration Compound Cement, Aggregate, Fly Ash, Water & Foaming Compound Top Soil & Energy
General Properties      
Dry Density kg/m3 600 750 – 800 1900
Compressive Strength in kg/cm3 40 25 – 30 40-75
Range of applications / utility Non-load bearing blocks Partition Load-bearing & non-load bearing
Aging No gain in strength with age Gains strength with age No gain in strength with age
Thermal Conductivity (W/m.k.) 0.132-0.151 for 600 kg/m3 0.132-0.151 for 800 kg/m3 0.18
Sound Insulation Superior than burnt clay & hollow concrete Superior than burnt clay & hollow concrete Normal
Ease of Working Can be cut, nailed & drilled Can be cut, nailed & drilled Normal
Shape & Form      
Pre-cast Brick size 600 x 200 x 100/150/200 mm 600 x 200 x 100/150/200 mm 230 x 100 x 70 mm
Pre-cast elements Any size of elements Any size of elements Not feasible
Cast in shape Not feasible Any shape & size in any density Not feasible
Water Absorption % by weight 45% by volume 12% for 800 kg/m3 density (by volume) 20% by volume
Drying Shrinkage mm/meter Shrinkage after maturing0.011 (for 600 kg/m3) 0.058 (for kg/m3) 0.1 No shrinkage
Productivity Output 100% more than brick work Output 100% more than brick work Normal
Eco Friendliness Pollution free, High energy requirement, Open process uses fly ash Pollution free, Least energy requriement, Can consume fly ash around 33% Creates smoke, Uses high energy, Wastes agricultural land
Structural saving due to dead weight reduction 55% reduction in weight of walls. Tremendous structural saving for high rise buildings in Earthquake / Poor soil area 55% reduction in weight of walls. Tremendous structural saving for high rise buildings in Earthquake / Poor soil area No additional saving

Compare AAC with CLC

Parameters Autoclaved Aerated Concrete Blocks Cellular Lightweight Concrete Blocks Burnt Clay Bricks
Basic raw materials & other inputs Cement, Fly Ash & Acration Compound Cement, Aggregate, Fly Ash, Water & Foaming Compound Top Soil & Energy
General Properties      
Dry Density kg/m3 600 750 – 800 1900
Compressive Strength in kg/cm3 40 25 – 30 40-75
Range of applications / utility Non-load bearing blocks Partition Load-bearing & non-load bearing
Aging No gain in strength with age Gains strength with age No gain in strength with age
Thermal Conductivity (W/m.k.) 0.132-0.151 for 600 kg/m3 0.132-0.151 for 800 kg/m3 0.18
Sound Insulation Superior than burnt clay & hollow concrete Superior than burnt clay & hollow concrete Normal
Ease of Working Can be cut, nailed & drilled Can be cut, nailed & drilled Normal
Shape & Form      
Pre-cast Brick size 600 x 200 x 100/150/200 mm 600 x 200 x 100/150/200 mm 230 x 100 x 70 mm
Pre-cast elements Any size of elements Any size of elements Not feasible
Cast in shape Not feasible Any shape & size in any density Not feasible
Water Absorption % by weight 45% by volume 12% for 800 kg/m3 density (by volume) 20% by volume
Drying Shrinkage mm/meter Shrinkage after maturing0.011 (for 600 kg/m3) 0.058 (for kg/m3) 0.1 No shrinkage
Productivity Output 100% more than brick work Output 100% more than brick work Normal
Eco Friendliness Pollution free, High energy requirement, Open process uses fly ash Pollution free, Least energy requriement, Can consume fly ash around 33% Creates smoke, Uses high energy, Wastes agricultural land
Structural saving due to dead weight reduction 55% reduction in weight of walls. Tremendous structural saving for high rise buildings in Earthquake / Poor soil area 55% reduction in weight of walls. Tremendous structural saving for high rise buildings in Earthquake / Poor soil area No additional saving