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 |
