LAUSR

Abstract In this study, the flexural performance of high volume fly ash (HVFA) concrete structural elements is investigated with the help of load-deflection tests on reinforced concrete (RC) beams and slabs. A total of 32 beams and slabs, 8 from each mix group were cast with different percentages of fly ash replacement varying from 0 to 60% for two plain concrete grades. The RC beams were tested up to the failure under a four-point bending test and for slab specimens, the load was applied at the centre. The tests on structural elements were carried out after 28 days of curing. The deflections at mid-span, cracking pattern, yielding and ultimate state conditions of RC beams and slabs are determined. Further, the finite element modeling using ABAQUS has also been carried out on RC beams and slabs for static load and the results are compared with the experimental values. The yielding and ultimate state of RC concrete with HVFA exhibit identical trend as compared to that of RC concrete without HVFA. It is observed that the load-deflection behaviour and cracking pattern of plain and fly ash concrete RC beams and slabs are in good agreement with the finite element model.