Abstract:Pervious concrete is considered as one of the best pavement materials for rainwater management in sponge city construction. Strength and permeability are two important parameters to be considered in permeable concrete design, In order to balance the relationship between strength and permeability of pervious concrete,In this paper, through mechanical and permeability tests, the influence of four ultrafine supplementary cementitious materials (silica powder, slag powder, latex powder, fly ash) and four dosage (5%, 7%, 9%, 11%) on mechanical properties and permeability of pervious concrete was studied. The results show that the addition of ultrafine supplementary cementitious materials can improve the compressive and flexural strength of pervious concrete, when the content of silica powder is 9%, the 28-day compressive strength of pervious concrete more than 35MPa.The porosity and permeability of permeable concrete decrease with the increase of the content of ultrafine supplementary cementitious materials. When the porosity is controlled within 18%~19%, a good balance between permeability and strength can be achieved.There is an exponential positive correlation between porosity and permeability, and an exponential negative correlation between porosity and compressive strength and flexural strength.The nonlinear relation equation between compressive strength and flexural strength of pervious concrete is established, and the prediction of flexural strength of pervious concrete is realized.