Abstract
In the current scenario, concrete construction is rapidly becoming an uneconomical and unsustainable operation because of the lack of raw materials and environmental degradation caused by the production of cement. In this study, an attempt was made to propose recycled aggregates from demolition waste as coarse aggregates in geopolymer concrete (GPC). Experimental studies have been carried out to determine an optimum percentage of recycled aggregates (RA) in GPC by replacing 20 percent, 30 percent, 40 percent, 50 percent, and 60 percent and behaviour of structural elements also, such as beams and columns, when these are subjected to bending and axial compression . Beams and columns of 150 mm × 150 mm × 1200 mm were prepared and tested under two point loading on beams and axial loading on columns of OPC, GPC and RGPC elements. From this study, it is found that an optimum replacement percentage of recycled aggregate was 40 percent based on mechanical properties and flexural behaviour of RGPC, GPC are relatively similar, but better than OPC element.
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