摘要：The basic properties of the fly ash, recycled brick powder and recycled concrete powder, compared the recycled brick powder and recycled concrete powder instead of fly ash in concrete preparation, influence on the working performance and mechanical properties; and through the modifier to improve the concrete slump loss is too large, analyzes the mechanism of change influence of modifiers on mechanical properties of concrete. The results showed that the recycled brick powder and recycled concrete powder in certain fineness conditions, its performance with fly ash; retarder, activator and some surfactant composition modifier has obvious effect on the working performance and mechanical properties; and hydration calcium silicate aluminum increased the role of large the mechanical properties of concrete.
