Influência da adição de agregados reciclados de resíduos sólidos da construção civil em um concreto asfáltico

Abstract

This final paper presents a study on the influence of the addition of recycled aggregates - AR of solid construction waste - RSCC, also called construction and demolition waste - RCD in an asphalt concrete. Asphalt concrete is the most widely used type of asphalt coating in brazilian pavements and, consequently, the study of the composition of this concrete is of great relevance given the weight of social, environmental and financial damage, resulting from the poor management of the processes that involve its production: obtaining the raw material and execution of asphalt mixture dosages. The extraction of large volumes of natural aggregates results in considerable environmental impacts and an increasing increase in product costs due to the depletion of deposits. On the other hand, research carried out, with the RSCC as its object, points to acceptable results regarding the investigation of these residues as alternative materials in the composition of asphalt pavement layers. Thus, in order to collaborate with an environmentally appropriate destination of RSCC and improve the cost factor in the production of asphalt concrete, the effects of partial replacement of natural aggregates, usually used in the production of asphalt concrete, by recycled aggregates were analyzed. To verify the influence of the suggested substitution, characterization tests of natural and recycled aggregates were performed, as well as studies of asphalt concrete dosages using natural aggregates and, with the addition of two levels of recycled aggregates, based on the Marshall method. The results pointed to the need for more studies to better evaluate the properties of asphalt concrete with the addition of recycled aggregate.