Eficiência de drenagem de um modelo de pavimento de concreto permeável sob chuva natural

The growth of the cities brings about the construction of houses, paved streets, sidewalks and several other impermeable buildings. Thus, a consequence of the urbanization is a greater rainwater surface runoff. Faced with this problem, it is necessary to find practices that improve the urban drainage operation. The present paper aims to evaluate the drainage efficiency of a permeable concrete pavement model under natural rainfall. The flexural tensile strength and the permeability of the permeable concrete were evaluated. Also, a permeable pavement model was built with proper design of the bedding and aggregate layers. This model made it possible to collect the surface runoff generated and thus, by relating these data to natural rainfall, it was possible to calculate the runoff coefficient of the permeable pavement. The permeability coefficient of the permeable pavement was 1,5∙10-2 m/s. The results of flexural tensile strength and concrete permeability coefficient were 1,72 MPa and 1,8∙10-2 m/s. The mean runoff coefficient was 0,024. Therefore, this work shows the efficiency of the permeable concrete pavement model in reducing surface runoff.