What is CLC Brick?

Cellular Light Weight Concrete (CLC) is a version of lightweight concrete that is produced like normal concrete under ambient conditions. It is produced by initially making slurry of Cement, Fly Ash, and Water which is further mixed with the addition of pre-formed stable foam in a concrete mixer under ambient conditions. The mixture is either poured into assembled moulds of blocks. The foam imparts free flowing characteristics to this slurry due to ball bearing effect of foam bubbles enabling it to easily flow into all corners and compact by itself in the moulds without requiring any Kind of vibration or compaction.

Advantages of CLC Bricks:

CLC Blocks are competitive with bricks in pricing and offer significant savings for finished structures. Savings in construction cost can be as much as 18% when using CLC Blocks, as compared to brick, after taking into account the resulting savings in gravel, cement, steel, labour, Structure, foundation etc.

• Thermal Insulation:- This increasingly turns to be the most important issue in the planning and construction of buildings. There are many costly ways of insulation on sandwich structure of a wall, adding the one or another rigid insulation material, with a satisfactory result by computation but not always a sound solution in safety, health or environment. The best solution is, to incorporate thermal insulation in the mix of a concrete, such offered in air cured CLC.Thermal conductivity of foam concrete used in clc is achieved is between, 0.05-0.15 Kcal / mh , which is 20-30 times higher, than normal concrete.
• Weight Reduction:- CLC Blocks weight being 1/3rd of conventional bricks the handling and transportation is easy.This light weight will help in reduction of steel and RCC in the structure of the building.
• Fire Resistant:- The air-embedded in the CLC is also instrumental for the high fire-rating. In 1200 kg/m³ density a 13-14 cm thick wall has a fire endurance of 5 hours. The same delay occurs with a 400 kg/m³ layer of CLC in only 10 cm thickness. CLC is otherwise non-combustible.
• Work Execution:- Require minimum skilled workforce and primarily deploying unskilled labour.As the brick is light weight the construction speed is 2 ½ times more than the Clay Bricks construction and cement blocks.
• Environment friendly :- Its neither wasting natural resources nor creating pollution.

Comparision:

Parameters	CLC	AAC	BURNT CLAY BRICKS
Basic Raw Materials	Cement, Fly-Ash or Sand, Foam & Water	Cement, Fly-Ash,Aluminium Powder, Lime & Gypsum	Top Soil, Clay
Dry Density	750 - 800	650 - 750	1800
Compressive Strength	25 - 30	30 - 35	40 – 45
Applications	Load Bearing & Non-Load Bearing Walls,Thermal Insulation &Filling	Non-Load Bearing Walls Only	Load Bearing & Non-Load Bearing Walls
Thermal Conductivity	0.132 – 0.151 for 800 Kg/m3	0.132 – 0.151 for 800 Kg/m3	0.184
Sound Insulation	Superior Than Burnt Clay & Hollow Bricks	Superior Than Burnt Clay & Hollow Bricks	Normal
Water Absorption	10%	Up to 45%	Up to 25%
Shrinkage	No Shrinkage	Min Shrinkage	No Shrinkage
Ageing	Gains Strength with Age	No Gain in Strength with Age	No Gain in Strength with Age
Eco Friendly	Pollution Free, No Energy Requirement,Consumes Fly-Ash around 35%	Pollution Free, High Energy Requirement	Creates Smoke, Uses High Energy & Wastes Agricultural Land
Structural Savings	Upto 55% Reduction in the Weight of the Walls,Tremendous Structural Savings for High Rise Buildings in Earthquake & Poor Soil Prone Areas	Upto 55% Reduction in the Weight of the Walls,Tremendous Structural Savings for High Rise Buildings in Earthquake & Poor Soil Prone Areas	No Additional Savings
Size	600 X 200 X 100 / 150 /200 / 225 mm	600 X 200 X 100 / 150 /200 / 225 mm	230 X 100 X 75mm
Pre Cast Elements	Any Size of Elements	Any Size of Elements	Fixed Size.
Cast in Shape	Any Size and any Density(300Kg/m3 to 1400Kg/m3)	Not Feasible	Not Feasible
Mortar used	0.0043m3 cement motor for 1 m3	0.0043m3 special solvent for 1 m3	0.015m3 cement motor for 1 m3

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