寒区透水性混凝土配合比设计试验研究

Test Research of Mix Design for Permeable Concrete in Cold Region

透水性水泥混凝土具有减少路面径流水量、改进水质、提高排水速度、增强路面在雨雪天气的抗滑阻力等优点,因而得到了越来越多的应用。但由于它孔隙率高、强度低,给其应用带来了很大的局限性,尤其是在潮湿和冰冻的环境下。通过对24种由集料、粘合剂和外加剂组成的不同配合比的混合料进行试验研究,得到了透水性水泥混凝土的最佳配合比,使其不仅有足够的孔隙利于雨水的渗透,而且有足够的强度和冻融耐久性。

Portland cement permeable concrete is being used more and more frequently due to reducing pavement runoff volume, accelerating the drainage of water, improving water quality, enhancing pavement skid resistance in sleety weather and so on. But it has high porosity and low strength, which has resulted in the limited use of permeable concrete, especially in wet and freezing environments. By testing 24 kinds of concrete mixes consisting of aggregates, adhesive and additives, optimum mixture ratio of permeable concrete is obtained, which not only has enough pores for better pervasion of water, but also has enough strength and freeze-thaw durability.