Utilization of Local Fly Ash for Producing Self-Compacting Concrete

Abstract Self-compacting concrete (SCC) mixture is an innovation that aimed to ease concrete casting due to its characteristic can be compacted by self-weight without compacting or vibrating. The original SCC mixture which first developed by Okamura contains silica fume (SF) as supplementary material. In this study, fly ash (FA) was used as supplementary cementitious material for SF substitute. The variation of FA used in the mixtures of SCC concrete was 10%, 15%, and 20% by cement weight. For all variations of FA, the results of fresh concrete tests obtained workability that satisfactory to the SCC criteria for the slump flow, V-funnel, and L-shaped box tests. Furthermore, the results of hardened concrete tests achieved the compressive strength ranging from 40 to 46 MPa. These results indicate that local Aceh FA originating from Nagan Raya can be used as supplementary cementitious material to produce SCC with the compressive strength lay in high strength concrete categories.