Utilização de Compactador Giratório SUPERPAVE (CGS) na dosagem de misturas asfálticas do tipo Camada Porosa de Atrito (CPA).

Abstract

In Brazil, a country that uses predominantly road transport, has been doing research for paving methods that are able to offer confort and safety to users. It guarantees a good skid resistance and a effective drainage of superficial waters, among other characteristics. Therefore draining pavments were created. They are used to mitigate the need for the pavement to allow the flow of waters, much like the Open-graded friction course (OGFC). The OGFC is a tecnology used as floor coating and its main characteristic is high volume of air voids, between 18% and 25%. The goal of this research is to contribute in investigations about the viability of use Compaction SGC, in dosage of OGFC, based on parameters stablished by norm DNIT-ME 386/99. Thus the study aimed to increase the benefit of kneading compaction that simulate more accurately the compaction field, to reality of Brazilian dosage of OGFC, which is now made with Marshall technology. In this study, we made Compaction SGC of asphalt mixtures in binder contentes of 3,5%, 4,0%, 4,5%, 5,0% e 5,5% in aggregate weight. They were tested to determine the parameters of volume of air voids, Cantabro and Indirect Tensile Strength, as determined by the DNIT-ME 386/99 standard for dosage purposes, Considering the results, the optimal content binder is 4,5% for OGFC. With the purpose of evaluating the effects of Compaction SGC in the CPA mixture dosed by the parameters of DNIT-ME 386/99, the mechanical and hydraulic characterization tests established by ASTM D7064-13 were carried out, which are volume of air voids, Cantabro, Indirect Tensile Strength, flow, Resilient Modulus, moisture-induced damage and communicating voids. The results found were satisfactory, indicating the feasibility of using Compaction SGC in OGFC dosed according to the parameters established by the Brazilian standard DNIT-ME 386/99.