ENHANCING CONCRETE PROPERTIES BY USING WASTE AND RECYCLED MATERIALS

Preservation of environment and conservation of natural resources is the essence of any development. In order to address environmental effects associated with cement manufacturing, it is crucial to advance alternative binders to compose concrete. The work audits the feasibility of fly ash, glass powder and demolished concrete as partial substitute of cement and natural coarse aggregate respectively. For this intent, procedure is partitioned into two stages. The initial stage proceeds with replacing 25% cement content by variant proportions of fly ash (FA) and glass powder (GP). Further tested for compressive and flexural strength, at 7 days, 14 days & 28 days and correlated with conventional concrete. The adequate results were attained with the combination of cement 75% and fly ash 25% in ratio, w.r.t properties tested. In second stage, same optimum ratio of cement and fly ash added with partly replaced natural coarse aggregate (NCA) with recycled concrete aggregate (RCA) in concrete. For test intent, recycled aggregates were accessed from crushed concrete cubes of grade M25 in laboratory. Observations reveal, combination of 90% NCA and 10% RCA in ratio, leads to adequate results.