无砂大孔透水混凝土实验研究

透水混凝土具有良好的透气性和透水性,用于铺筑路面工程,对于改善环境、降低路面噪音和提高行车舒适性均具有良好的效果,属于一种环保型绿色的建筑材料。该文采用间断级配的粗集料,构建强度达到27MPa、透水系数为6ml/min的高性能透水混凝土。试验表明:对于间断级配的无砂大孔透水混凝土,具有一个最佳用水泥浆用量。集料粒径越小,其强度越大,透水系数越小;集料粒径越大,则反之。因此,为满足两方面需求,设计中应选择一个合适的集料粒径。

Experiment Study of Unsanded Macrovoid Pervious Concrete

The pervious concrete has the good air permeability and water permeability, which is used for paving the pavement works. It has the good results for improving the environment, reducing the pavement noise and enhancing the driving comfortability. It belongs to an environmental protective green building material. The article uses the high-performance pervious concrete of the gap-graded coarse aggregate. Its constructional strength reaches 27 MPa and the pervious coefficient is 6 ml/min. The experiment makes clearly that the gap-graded unsanded macrovoid concrete should have an optimum cement mortar usage. The smaller the aggregate grain is, the higher its strength is; the smaller the pervious coefficient is, the larger the aggregate grain is. Therefore, in order to meet the requirements of two aspects, a suitable aggregate grain should be selected in the design.