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contact name : Rao

Parameters	Lightweight Concrete		Burnt Clay Bricks	Concrete (Hollow Core) Blocks
	CLC Foam Concrete	AAC Aerated Autoclaved Concrete
Basic raw materials	Cement, fly ash, water and foam	Cement, lime, specially grinded sand,aeration compound, high primary energy input	Top agricultural soil, primary energy input	Cement, sand, aggregate
Production process and set-up	Using ribbon  mixer and foam generator	Produced only in well established plant, equipped with steam boiler and high pressure auto-claves	Processed in specially erected or central brick kilns	Mobile or stationary
Dry density kg/m³	300-600/ 800-1000 /1200- 1800	400-700	1900	1700
Compressive Strength kg/ cm2	4-10 / 25-35 / 125--250	20-40	30-80	30-150
Usage	Thermal insulation , partitions, non-load bearing blocks	Non-load bearing panels and blocks	Load bearing & non-load bearing walls	Load bearing & non-load bearing walls
Block / element size and shape	Any size, shape given by mould/cut	Any size, shape given by mould/cut	Typically shape and size	Typically size
Compaction during production	None	None	Yes	Yes
Aging	Gains strength with age (like conventional concrete)	No aging Loses strength, if not protected against humidity	No	Yes
Thermal conductivity (W/mK)	0.09 – 0.12 (depending on density)	0.09-0.15 (depending on density)	0.4	2.1
Sound insulation	Superior	Superior	Normal	Better
Ease of working	Superior: Can be cut, sawn, nailed, drilled, ordinary mortar/plaster	Superior: Can be cut, sawn, nailed, drilled, Special mortar (glue) and plaster is required	Normal	Difficult
Eco friendliness	- Pollution free - No primary energy consumption - Can consume fly ash (waste material)	- Pollution free - High energy consumption	- Creates smoke - high energy consumption - wastes agricultural land - soil erosion - banned in more and more countries	- low energy - no smoke
Note: The structural savings in the cost of steel and concrete due to reduced weight of walls would be additional advantage, as well as savings in transportation, foundation, piling and crane handling