再生骨料在透水混凝土中的应用研究

Application Research on Recycled Aggregate in Pervious Concrete

将废弃混凝土破碎制备再生骨料应用于透水混凝土中,通过四因素三水平正交试验研究了骨料粒径、集灰比、水胶比、水泥用量四个因素对再生骨料透水混凝土性能的影响。结果表明,影响透水混凝土性能的因素依次为骨料粒径>水泥用量>集灰比>水胶比,水胶比在0.27～0.35范围内对再生透水混凝土性能无显著影响。选取正交试验中强度和透水系数最高的两组分别研究再生骨料掺量对透水混凝土性能影响,结果表明,再生骨料在透水混凝土中的掺量不宜超过50%。

Recycled aggregate made by crushed deserted concrete was used to prepare pervious concrete. The orthogonal experiments of four factors and three levels was carried out to study influence of aggregate size,aggregate- binder ratio,water-binder ratio, cement content on the performance of pervious concrete. The results show that the contribution of factors which affect the performance of pervious concrete is aggregate size〉cement content〉aggregate- binder ratio〉water-binder ratio. The water-binder ratio has no significant effect on the performance of recycled pervious concrete in the range of 0.27-0.35. The two groups with the highest strength and permeability coefficient in the orthogonal test are selected to study the effects of recycled aggregate content on the performance of pervious concrete, result shows the content of recycled aggregate in pervious concrete should not exceed 50%.