Estudo preliminar de concretos permeáveis como revestimento de pavimentos para áreas de veículos leves.

Abstract

The main goal of this research was to study the pervious concrete material as the surface layer for light traffic pavement by carrying out a laboratorial analysis in order to better understand the mechanical and hydraulic behavior of three different coarse aggregate gradation mixtures. Besides that, it was applied a Finite Element Analysis in order to identify the pervious concrete behavior when loaded by different vehicle loads by using the EverFE Software The mechanical characterization was developed by evaluating the tests results of flexural strength, split tensile strength, compressive strength, Young’s Modulus and the non-destructive ultrasonic test. The hydraulic conductivity was measured using a constant head permeameter. In order to carry out the mechanistic analysis, it was considered a pervious concrete slab loaded by both an 80 kN dual wheel axle, and, to simulate a light vehicle, a 22 kN single wheel axle. The studied material has shown, considering the void ratio of 0,25, values of hydraulic conductivity around 0,14 cm/s, characterizing a material with good drenability characteristics. Besides that, it presented a flexural strength of 2,1 MPa and Young’s Modulus of 15.000 MPa, reaching the half of the values commonly used in regular concretes for pavements. By using the mechanistic analysis, it was possible to assess that this specific studied pervious concrete has enough strength to be used as the surface layer of pavements loaded by lightweight vehicles.