“Evaluation of Concrete Properties by Partial Replacement of Fly Powder and Glass Grind with Cement & Recycled Aggregate with Nca”

Rakesh Kumar Jatav, Arpit Chawda


Preservation of environment and conservation of natural resources is the essence of any development. Also the present R and D continuously deal with technological and industrial development on waste management. In order to address environmental effects associated with cement manufacturing, it is crucial to advance alternative binders to compose concrete. Consequently extensive delving is continuing, on substitution of cement by differing waste materials and industrial offshoot. As partial replacement of cement and/or aggregate attempts on fly ash, demolished concrete, waste glass, rice husk etc. have already been accomplished in concrete industries. If little waste material found convenient and economical for concrete manufacturing, a major gain will be achieved in disposal of waste management and depression in construction cost. 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 is 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. Variant composition of natural coarse aggregate and recycled aggregate adopted and test samples from this matrix were prepared for the same test as mentioned above. Observations reveal, combination of 90% NCA and 10% RCA in ratio, leads to adequate results.

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