Abstract
ABSTRACT The utilization of industrial waste as a partial replacement in construction materials has been increasing rapidly in recent years. This Paper investigates the performance of reinforced concrete columns comprising of recycled aggregates, fly ash and synthetic fibres in varying percentage, under monotonic and thermal loads. Ten full scale reinforced concrete columns of size 150 x 150 x 750 mm were experimentally studied under compressive loads. Results of the experiment showed that the polypropylene (PP) fibre reinforced fly ash column with recycled aggregate consisting of 1.5% PP fibre, 15% fly ash and 25% recycled aggregates exhibited better load carrying and deflection capacities and was further considered for numerical analysis. The conventional column was modelled as a control specimen and the behaviour of polypropylene fibre-reinforced fly ash column with recycled aggregate was comparatively studied under the action of thermal loads in ABAQUS. In order to understand the effect of fibre-reinforced polymer (FRP) rebar reinforcement in columns under thermal loads, a parametric study was carried out by varying the type of reinforcement, using carbon fibre-reinforced polymer rebar (CFRP) and glass fibre-reinforced polymer rebar (GFRP). The polypropylene fibre-reinforced fly ash column with recycled aggregate reinforced with CFRP rebars exhibited better performance under thermal loads.
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