Comparing Between Crushed and Fine Aggregate Recycled in Concrete

This paper is based on investigating the effect of using fine and coarse crushed bricks in the compression strength of concrete. Detailed research has been done from the current literature that is based on previous laboratory-based tests of the use of bricks in concrete. In order to investigate this particular area 10 mixes of concrete were prepared. Mixes included 0%, 25%, 50%, 75% and 100% use of fine and coarse crushed aggregates. Bricks were crushed to achieve fine and coarse crushed bricks. 3 specimens of each mix were casted and cured in the water tank. Compression strength test was conducted after 28 days of curing for each specimen. Results were analysed and compared between the mixes with coarse crushed aggregates and fine crushed aggregates. Finally, it was concluded that the mean target strength of concrete is achievable by replacing up to 50% of gravel and sand with coarse and crushed bricks. However, physical properties of bricks like absorption reduce the amount of water in concrete by leaving less water to react with cement that results in higher compression strength due to a reduction in water–cement ratio.