Avaliação do desempenho acústico e das características de superfície de camada porosa de atrito em meio urbano

Abstract

Porous Friction Courses (PFC) are used, among other places, on highways or runways to promote functional improvements to the pavement surface. In Fortaleza, PFCs are used in urban roads. The aim of this paper is to evaluate the acoustic and surface performance of PFCs in these types of roads. In order to achieve this purpose, acoustic tests (controlled pass-by method) were performed on roads where PFCs and dense Asphalt Concrete (AC) were used as wearing courses. Traditional micro and macrotexture tests were performed and, in addition, the Close-Range Photogrammetry (CRP) technique was used to obtain surface parameters. PFCs were found to be efficient in reducing noise in the urban environment (up to 5.6 dB (A)). The micro and macrotextures for PFCs were similar to those of a conventional AC. The CRP technique allowed the obtention of parameters that betteer characterize negative texture surfaces, which is the case of PFCs.