Avaliação da macrotextura do pavimento asfáltico de um trecho de rodovia localizada no noroeste do estado do Paraná

Abstract

The surface drainage capacity of an asphalt pavement is of fundamental importance in a highway, it covers several aspects related to the comfort and safety of users, being the main ones: the effect of night mirror, the adhesion between the tire and the pavement, hydroplaning , Noise and spray. Therefore, it is essential to determine the conditions of the macrotexture of the coating, which is one of the properties responsible for forming runoff channels in the pavement, expelling the water deposited in the runway. In this work a macrotexture evaluation of the rolling layer of a recently implanted section of the Highway was carried out, located between the cities of Tuneiras do Oeste and Campo Mourão. As a new coating, not yet studied, there was no information on the efficiency conditions as to the runoff capacity of the runway. Therefore the evaluation consisted of identifying the conditions of the surface of the coating by measuring its macrotexture. Therefore, for the survey of the data in the points to be studied, a method that is commonly used in Brazil, and of easy application, which is the Sand Stain test, was adopted. The results obtained in this study indicated that this segment of the highway is meeting the guiding speed according to American Society for Testing and Materials specifications, but in disregard of DNIT service instructions.