Utilização de resíduos sólidos no estudo da susceptibilidade do concreto asfáltico à presença d'água.

Abstract

This study considered the technical viability of the use of solid residues from the kaolin and ornamental rock industries, reported in the literature as pollutants in Paraiba, as small aggregate and filler to minimize the susceptibility to water of asphalt mixtures. These residues utilization may reduce costs of road pavement and find an environmentally correct destiny to toxic and non inert materials generated by small and medium industries of Paraíba. Several laboratory tests were carried out to characterize the residues, the “mastiq” and the asphalt mixtures, such as atomic absorption spectrometry, chemical, thermogravimetric and differential thermic analyses, X-ray diffraction, laser diffraction granulometry, Saybolt-Furol viscosity, penetration, traction from diametric compression, modified Lottman and Marshall tests. Data analyses showed that both residues render the asphalt mixture less susceptible to water action, specially the kaolin residue. The asphalt mixture with this residue is more flexible and less prone to crack due to premature material fatigue, extending the lifetime of pavements.