再生粗骨料对混凝土结构力学性能的影响

Influence of Recycled Coarse Aggregate on Mechanical Properties of Concrete Structure

为了研究再生粗骨料对混凝土结构力学性能的影响,采用两种不同吸水率和成分的再生粗骨料、不同的替代率水平(0、20%、50%和100%)和两种不同的水灰比取代天然粗骨料,制作成不同类型的混凝土试件,进行了室内力学性能试验。结果表明,由于再生骨料的替代率和特性不同,再生混凝土的力学性能(抗压强度、劈裂强度和弹性模量)存在明显差异。

In order to study the influence of recycled coarse aggregate on the mechanical properties of concrete structure,two kinds of recycled coarse aggregate with different water absorption and composition,different replacement rate levels(0%,20%,50%and 100%)and two different water cement ratios were used to replace the natural coarse aggregate to make different types of concrete specimens,and the indoor physical and mechanical properties tests were carried out.The results show that the mechanical properties(compressive strength,splitting tensile strength and elastic modulus)of recycled concrete are significantly different due to the different replacement rate and characteristics of recycled aggregate.