Effect of Crushed Clay Brick as Partial Replacement of Fine Aggregate in Concrete

Abstract

The reuse of construction and demolition wastes, especially crushed clay bricks (CCB), represents a major contribution to the environment. Due to the nature of clay bricks, it can be considered as source of fine and coarse aggregate to produce structural concrete. This research has been conducted with the objectives of highlighting the effect of crushed clay brick as partial replacement of fine aggregate in concrete. Compressive strength of concrete made by different partial replacement of fine aggregates were evaluated on (0%,15%, 25%, 30%, 50%, and 75%). To achieve the objectives of this study, the laboratory tests have been performed. The strength of gravels has been investigated by Los Angles Abrasion test according to ASTMC 131. Sieve analysis was performed to determine the particle size distribution. The consistency and fineness test of Cimerwa cement was conducted and results of fineness of cement was 9.165%. Initial setting time was 98 minutes and final setting time was 256 minutes. The compressive strength of concrete was performed and the results at age of 28 days were 31.81Mpa, 29.38Mpa, 27.45Mpa, 24.86Mpa, 17.91Mpa and 15.84Mpa respectively. The percentage reductions for (15%, 25%, 30%, 50% and 75%) was 7.63%, 13.70%, 21.84%, 43.69% and 50.20% respectively. According to IS 456 specified minimum compressive strength of concrete after 28 days of curing is 25N/mm2 for M25 grade of concrete, with the partial replacement of 20%, the resulted compressive strength is 27.45 Mpa.