CLC block

CLC is called as Cellular Light Weight Concrete and it is also called as Foam Concrete. Cellular Light Weight Concrete (CLC)
is a version of light weight concrete that is produced like normal concrete under ambient conditions. CLC Blocks are a
cement-bonded material made by blending slurry of cement. Stable, pre-formed foam manufactured on site is injected into
this slurry to form foam concrete. Fresh foam concrete looks like a milk- shake and the volume of slurry in the foam dictates
the cast density of the foam concrete.
Are you worried about rising construction costs of projects ?
If yes, then CLC blocks is your answer. CLC blocks are a cement-bonded material made by blending slurry of cement. Stable,
pre-formed foam manufactured on site is injected into this slurry to form foam concert. Fresh foam concrete looks like a
milk-shake and the volume of slurry in the foam dictates the cast density of the foam concrete.
Why should a CLC Block Plant Be setup ?
Advantages
Applications
Raw Material
Procedure of Making CLC
Aqueous foam is produced from the foam generators (IFG) and injected into slurry of cement, fly ash and water in foam
concrete mixture (IFM). It creates many small air cells which are uniformly distributed throughout the concrete and create
cellular from 300kg/m3 to 1800kg/m3 with compressive strength between 5kg/cm2 to 200kg/cm2. The volume of air cells
in foam concrete determines the density and strength. The final mixture is then used for different applications without any
vibration or compaction. Fly ash which is a waste-product at thermal power stations. The foam concrete is thus a green
building material.
Comparison between CLC blocks and bricks
Parameters CLC Blocks Burnt Clay Bricks
Basic raw materials Cement, fly ash, water and foam Top agricultural soil, primary energy
input
Dry density kg/m3 600/800 1900
Ageing Gains strength with age (Like
conventional concrete)
No
Sound insulation Superior Normal
Eco friendliness - Pollution free
- No primary energy consumption
- Consumes fly ash (an hazardous
industrial waste material)
- Creates smoke
- high energy consumption
- wastes agricultural land
- soil erosion
- banned in more and more
countries
Thermal Insulation High thermal insulation Normal thermal insulation
Compressive strength Compressive strength is more than
other bricks.
Compressive strength is less
Water absorption capacity CLC is a light weight block where
water absorption is less as
compared to redbrick and fly-ash
brick
Redbricks and fly-ash brick absorb
more water than CLC blocks
CLC Block sizes
Size in MM No of Block in one m3
600 x 200 x 100mm 83
600 x 200 x 150mm 55
600 x 200 x 200mm 41
600 x 200 x 250mm 33
Comparison between CLC Blocks and AAC Blocks
Parameters CLC Blocks AAC Blocks
Basic raw materials Cement, fly ash, water and foam Cement, lime, specially grinded sand,
aeration compound, high primary
energy input
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
Dry density kg/m³ 600/ 800 400/ 700
Compressive Strength kg/cm2 30- 40 20- 40
Usage Thermal insulation , partitions, non-
load bearing blocks
Non-load bearing panels and blocks
Aging Gains strength with age (like
conventional concrete)
No aging Loses strength, if not
protected against humidity
Thermal conductivity (W/mK) 0.09 – 0.12 (depending on density) 0.09-0.15 (depending on density)
Eco friendliness - Pollution free
- No primary energy consumption
- Consumes fly ash (an hazardous
industrial waste material)
- Pollution free
- High energy consumption