Mechanical Properties of Recycled Concrete with Crushed Brick Coarse Aggregate

Abstract

In order to study the influence of the characteristics of crushed bricks on recycled concrete, the author took the water-cement ratio (W/C) as the design goal, and crushed bricks as coarse aggregates to prepare five groups of recycled concretes with different W/C. After maintenance under standard conditions, used the YE-2000C Pressure Testing Machine to perform a compressive strength test to calculate the compressive strength value. The results shown that: the increase of W/C ratio will reduce the compressive strength of recycled crushed brick concrete. In this test, the strength of recycled crushed brick concrete can vary between 23.13MPa and 35.43MPa; In order to accurately calculate the amount of raw materials, the regression coefficient of the crushed stone in the regulations is not directly used for calculation. In order to give full play to the role of crushed bricks and cement slurry, recycled crushed brick concrete has a suitable range of water-cement ratio. This conclusion provides a reference for the research and application of crushed bricks in recycled concrete.