Investigation on effects of Partial Replacement of Fine Aggregate by Pond Ash in Concrete

Concrete is the most common construction material because it has very versatile properties.But the over-extraction of natural aggregates like sand has caused serious environmental problems.Pond ash, a thermal power plant coal combustion by-product, has proved to be a good substitute for partial replacement of fine aggregates in concrete.This research investigates the mechanical characteristics of concrete with different percentages of sand replaced by pond ash.Compressive strength was evaluated for mixes having 0%, 25%, 50%, 75%, and 100% sand replacement with pond ash.Results indicated that replacement up to 25% by pond ash produced compressive strengths equal to conventional concrete, thus suggesting pond ash as a viable green substitute for natural sand..