海绵城市建设中的透水混凝土性能及应用效果

海绵城市面源雨水主要通过透水介质材料渗透,达到解决城市内涝、积水问题的目的,渗透是海绵城市建设的第一步,随着海绵城市的发展,透水混凝土、透水砖、透水EPDM、透水介质土等得到大量应用。为此,对透水混凝土的水胶比、添加剂、孔隙率与透水性进行了试验,得到了满足设计条件的最佳配合比,并应用于玉溪海绵城市建设中。在人行道和车行道施工中整体成型质量好,克服了透水混凝土掉粒等质量问题,并通过对粗骨料石子进行染色配制出彩色透水混凝土,同时满足了景观和透水性要求。

Performance and Application of Permeable Concrete in Sponge City Construction

The non-point source rainwater of sponge city mainly penetrates through the permeable medium material, which can solve the problem of urban water logging and accumulation. Infiltration is the first step in the construction of sponge city. Water permeable concrete, permeable brick, permeable EPDM , permeable medium soil are widely used to the construction of sponge city. Therefore, the water binder ratio, additives, porosity and permeability of permeable concrete were tested. The optimal mixture ratio meeting the design requirement was found and applied to the construction of Yuxi sponge city. In the construction of pavements and roadways, the overall molding quality was good, which overcame the quality problems of permeable concrete such as granulation and so on. The color permeable concrete was prepared by dyeing the coarse aggregate stones, which could meet the requirements of landscape and water permeability.