Experimental Studies on Utilization of Brick Waste as Coarse Aggregate in Concrete Mixes
Keywords:
Coarse recycled brick aggregate (CRBA), Control Mix, Natural coarse aggregate (NCA), Natural fine aggregates (NFA).Abstract
Crushed bricks as aggregates are of particular interest because their use can considerably reduce the problem of waste storage and simultaneously helps the preservation of natural aggregate resources. With this perspective, an experimental study is carried out to assess the possibility of using brick masonry waste as a partial replacement for natural coarse aggregate (NCA) in concrete mixes. Brick bats or brick masonry waste are crushed using hammer to recover coarse recycled brick aggregate (CRBA). M40 grade concrete mix is designed as per IS 10262:2009, by considering the properties of natural aggregates. NCA is partially replaced by CRBA at 10%, 20%, 30% and 40% in concrete mixes. Totally five concrete mixes (including control mix made of NCA and NFA) are considered in the study. The workability of the concrete mixes decreases with an increase in CRBA content. A marginal reduction in 28 days compressive strength is observed up to 20% replacement of NCA by CRBA. At 30% and 40% replacement level, the reduction in compressive strength is about 15% and 30% respectively. The tensile strength decreases with increase in CRBA content in concrete mix.
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