Estudo da aplicação de resíduos da construção e demolição da universidade federal de Campina Grande em pavimentos.

Abstract

One of the effects of urban expansion is the production of construction and demolition waste (CDW). The way these wastes have been discarded has caused great concern because of the negative impacts to the environment and, directly or indirectly, to the society. In order to reduce these impacts, we believe that the use of this material as aggregate in paving is a viable alternative. In this context, this study aims at analyzing the mechanical behavior of recycled aggregate from the Universidade Federal de Campina Grande - UFCG - in order to use it in base layers and sub-base and asphalt mixtures. The research consists of laboratory tests to analyze their physical and mechanical behavior. Thus, the physical and mechanical properties of the recycled aggregate for use in sub-base and base surface were determined by the following tests: composition, the percentage of detrimental materials, density, shape of the grains and compaction influence of compression, the California Bearing Ratio. The tests of asphalt mixtures included: fundamental tests of the binders (Brookfields Viscosity, Softening Point and Penetration). The mixtures were analyzed by means of mechanical tests such as Tensile Strength by Diametral Compression Module, Resilience and Testing for Moisture Induced Damage, and all samples submitted to the Marshall compaction process. The results showed us that, when compacted in the intermediate energy the residue can be used as sub-base and when compacted in the modified energy it can be used in as base. As aggregate in asphalt mixtures, the mixture with 3,9% of showed satisfactory results. Thus, we concluded it is possible to build pavement using throughout its structure recycled aggregate thus contributing to sustainable development.