Use of Construction and Demolition Waste as Replacemnet of Fine Aggregate in Concrete Paving Block

Abstract

India is beetle of both reclamation sites and landfill space for the disposal of construction and demolition (C and D) waste. It is important for India to adopt a strategy to reduce, reuse and recycle C and D waste. One of the ways to achieve this is using C and D waste in paving blocks as partial replacement of fine aggregate, reducing the quantity of C and D waste as well as the cost of fine aggregate in concrete. Different mix proportions were prepared for 0%, 20%, 40%, 60%, 80% replacement of C and D wastes fine aggregate. The compressive strength of paving block was measured. The results showed that maximum strength is achieved between the ranges of 40% to 60% replacement of fine aggregate with C and D waste fine aggregate, saving 3.28% cost of concrete. The study indicated that the C and D waste can effectively replace fine aggregate with little increase in strength. It is clearly beneficial in savings of virgin materials, often energy and CO2 emissions.