Verificação da influência do uso de resíduos industriais como filer em misturas asfálticas sob o efeito da presença d'água.

Abstract

Without an aopropriate management, the final dispasa! of the solid wastes can cause the poilution of soil, air and hydrological resources. As a consequence, it may occur any kind of damage to the human health and environment. ln this context severa! proóucfive compames have adopted "clean pracuces" by using the reincorporation of resídues ínto the productive cham. The kaolin is one of the most abundant minerais in Brazil it •s mainty employed at paper and ceramic industries. These kinds of industry, however, generate a huge volume of residues which are inadequately disposed at the environment, provoking many environmental impacts. The residues generated at the ornamental rocks improvement are also found in large amounts in Brazil. This kínd of mineral has great relevance at the global economy and Brazit detents many reserves where are extracted more than 450 rocks with different tonalities and standards. This works aims to study the technícal viabílity of the kaolin and graníte sawíng residues as fillers in the asphaltic mixtures as a way of minimízing the emrironmental lmpacts caused by these residues. To charactertze the residues the Tests of Chemical Analysís, Thermogravimetry, Differentiai Thermal Analysis, X-Ray Diffraction, Sedíment Granulometry and laser Diffraction were performed. The mechanical tests -0f Resilient Modulus, Modifíed Lottman T est and Marshall T est were conducted to verify the effects of these fillers íncorporation in the susceptibility of asphaltic mixtures at water's presence. The analysis of the effect of compaction method, impact and gyration, aimed to evaluate the influence of compaction in the mechanical and vo!umetric behavior of the mixtures. The achieved results indícate that both fillers tum the asphattic mixtures less susceptible to the water presence, The use of Granite residue, however, provides a more flexible mixture and, thus with less probability of presenting premature fissures during the pavement life span.