Strength Characteristics of Glass Fibre on Bottom Ash Based Concrete

Abstract: Bottom ash is a hazardous by-product from coal based thermal power plants. In this study fine aggregate in concrete mix has been replaced with bottom ash and glass fibre is additionally used to enhance the strength characteristics of concrete. The concrete mix design is done for M30 grade concrete. The mix is prepared for different combinations of 0%, 30%, 40%, 50% and 100% of replacement of sand by bottom ash with 0.3% of glass fibre by weight of cement. The mechanical properties were compared with control mix and it was found that the optimal combination as 50% bottom ash and 0.3% glass fibre (BGC). Flexural strength was compared by testing beams of size 1 x 0.1 x 0.2m under two point loading. Results showed that there was no degradation of strength for beams with bottom ash as replacement for fine aggregates.