Properties of cement-coated brick aggregate concrete.

Abstract

This paper presents an experimental investigation on the properties of cement-coated brick aggregate concrete. Natural coarse aggregate (NA) in concrete was replaced with cement M0-coated aggregate (CCBA) for 25, 50, 75, and 100%. CCBA was tested for the physical and mechanical properties to compare with the NA. A total of 5 concrete mixes consists of one control mix M0 and four CCBA (M25–M100) concrete mixes were prepared and tested for the physical properties and mechanical strengths. The physical properties of concretes such as workability (fresh stage), hardened density, and water absorption were determined. The compressive strength of the concrete was tested at 7, 28, and 56 days. Meanwhile, splitting tensile strength was determined at 28 days only. The experimental results showed that workability of the concrete was reduced with the increasing of CCBA in concrete. Zero slump concrete was recorded for concrete containing 75 and 100% CCBA. The water absorption of the concrete was increased with the increasing amount of CCBA. There is no significant reduction of compressive strength for CCBA concrete. However, CCBA concretes gained lower splitting tensile strength compared to the normal concrete. More investigation has to be done to validate the potential usage of recycled CCBA as coarse aggregate replacement for concrete construction.