CLC is customary concrete, in whichnatural gravel is supplanted via air installed in a organic, hardened/stableand bio-degradable foam which causes no substance reaction however exclusivelyfills in as a “enclosing” material for the air implanted in thesolid. CLC functions like conventional concrete, specifically concerningcuring, solidifying and most imperatively ageing. CLC boundlessly expands itsquality by hydration (framing of precious stones in bond) in so far as uncoveredto humidity in atmosphere. The raw materials involved in the process of manufacturingof CLC bricks are cement, lime, specifically ground sand and foam.
The procedureis based on generating air bubbles in the form of foam and then blending this foamwith cement or in some cases fly-ash slurry. Since CLC slurries have higherbond substance, no autoclave curing is required – rather, the completed item iscured like typical concrete or Steamed Cured with low strain to accomplishearly quality. Accordingto IS codes, these have a compressive strength of 2-2.5 kg/cm2 and itsdimensions are 400-600 x 200 x 100/150/200 mm with a variation size of 5mm (+/-). They possess low thermal conductivity of 0.32 Kw-M/C, which helps issaving 30% electricity costs. It emits very low carbon-di-oxide whilemanufacturing hence, it is not harmful for environment.
One cum of CLC brickscost around Rs. 4000. The factory setup is low as compared to AAC, and if steamcuring is utilized in production, manufacturing period is reduced. It has waterabsorption capability of 12-15% of volume of block. They possess a dry densityof up to 800 kg/m3 according to IS standards and fire resistant foraround 4 hours. Joining of bricks is done by using chemical mortar as a resultof which the material consumption of cement is reduced which furthermoreabstains from curing process. Having good dimensional veracity, the solidity ofplaster is also reduced.
These bricks are majorly used for light-weightconcrete panels, void fillings and are also used in structures located in theseismic zones in a bulk quantity.