FLOW AND MECHANICAL CHARACTERISTICS OF BRICK BATS SELF COMPACTING CONCRETE.

Concrete is most widely used construction materials in the world. Properly designed, mixed, compacted and cured concrete leads to durability problem. Self-compacting concrete is a better option to conventional compacting concrete for the places where the normal way of compacting may not be very much useful because of different site condition. Self-compacting concrete or high performance concrete is an innovative concrete mix which did not require any kind of vibration for compaction and placing. Hardened SSC concrete is dense, homogeneous and has the same mechanical properties and durability as conventional concrete. The utilization of waste industrial product in the concrete industry (i.e. flyash, rice husk ash slag etc.) is very much needed for the protection of our environment. Brick bat is one of the waste materials obtained from construction industry may be used in concrete as an alternative to coarse aggregate. In this paper, an experimental work has been carried out to study the flow characteristics of SCC concrete made with OPC 43 grade, W/C is 0.4 and 27% fly-ash with brick bats as replacement of coarse aggregate with different percentage (i.e. 0%, 5%, 10%, 15%, 20%, 25% and 30%) through different methods (i.e. mini slump cone, L box test, V funnel and V funnel T5min.). From the results it is observed that slum flow of SSC made with 20% replacement of brick bats is within the acceptable limit. It is also observed that the compressive strength of SSC concrete made with 20 percent replacement of brickbats is almost equal to that made with control mix.