Environ Freindly Materials and Techniques Building materials and technology development council

CELLULAR LIGHTWEIGHT CONCRETE

CLC blocks being made at a site for a high rise apartment project near Delhi.
Cellular Lightweight Concrete (CLC) has been used in over 40 countries over the past 25 years to produce over hundred thousand houses and apartments, apart from schools, hospitals, industrial and commercial buildings. CLC is an air-cured lightweight concrete with flyash as a major ingredient, that can be produced at large project sites just like traditional concrete, utilising equipment and moulds normally used for traditional concreting. It is especially suitable in India for low-rise loadbearing constructions and for partitioning work in multistorey blocks.

In view the use of flyash (33%) in CLC and this being a good substitute of ordinary clay bricks ( which use high energy and precious agricultural topsoil) the Govt. of India has given special import duty concessions for specialised equipment.