骨料对透水混凝土性能的影响

Effects of aggregate on the performance of pervious concrete

试验研究了骨料品种、骨料粒径对透水混凝土主要性能的影响。试验结果表明:在相同骨料粒径的情况下,由碎石骨料配置的透水混凝土总孔隙率和透水系数明显大于卵石骨料配置的透水混凝土,碎石的强度变化幅度比卵石的变化幅度明显;随着骨料粒径的增大两种骨料配置的透水混凝土的孔隙率、透水系数均有所增大,在同一配合比情况下,随着骨料粒径的增大透水混凝土的强度呈非线性变化,且存在最佳粒径尺寸。

The effects of the aggregate type and particle size on the main performance of pervious concrete are researched. The results show that in the same aggregate size the total porosity, the permeation coefficient and the change degree of compressive strength of the pervious concrete fabricated with crushed rock are obviously larger than that of the compressive strength of the pervious concrete fabricated with pebbles, and the total porosity and the permeation coefficient increase with the increase of aggregate particle size. Under the same circumstances the compressive strength of the pervious concrete is nonlinearly changing with the increase of the aggregate size, and the compressive strength of the pervious concrete has the optimal particle size.