DEVELOPMENT OF HIGH PERFORMANCE CONCRETE USING BOTTOM ASH AS FINE AGGREGATE

High performance concrete (HPC) is a concrete which possess most desirable properties during fresh as well as hardened stage. The ingredients which are used for making High Performance Concrete (HPC) contribute most optimally and efficiently to the various properties like compressive strength, split tensile strength, flexural strength as well as durability. Appropriate use of supplementary cementitious materials and super plasticiser gives good results. Usually GGBFS and micro silica which are the industrial by-products are used as supplementary cementitious materials to produce HPC. In this paper, study of the effect of bottom ash as fine aggregate, hooked end steel fibres, GGBFS and micro silica on the mechanical properties of HPC M80 grade was performed. The dosage of fibre was 1%. Water binder ratio was 0.26. The mix proportion adopted was 1:1.25:2.3 and the dosage of super plasticiser was 1%. The compressive strength HPC obtained was 97.60 MPa without bottom ash and 91.20 MPa with 25% bottom ash. Addition of 25% bottom ash seems to be the optimum level of replacement.