APPLICATION OF RECYCLED AGGREGATES OF CONSTRUCTION AND DEMOLITION SOLID WASTE OF THE METROPOLITAN REGION OF GOIÂNIA IN URBAN PAVEMENTS

Abstract

The need to meet increasing demands by government and society for reducing the environmental and economic impact caused by the large amount of construction and demolition waste generated and disposed of inappropriately in the environment becomes increasingly latent in modern society. Although there is already strict legislation in place, its application can still be considered incipient. Aiming to evaluate one of the alternatives to reduce these impacts on the environment, this research evaluated the potential of the application of recycled aggregates of solid construction and demolition wastes, commonly referred to as building and demolition wastes - RCD, in layers of bases and sub-bases of asphalt pavements by means of laboratory tests, replacing the natural aggregates. For this, samples of recycled aggregates produced commercially in the metropolitan region of Goiânia were made according to the current technical standards, being carried out the particle-size analysis, grain specific mass, Los Angles abrasion and shape index by the pachymeter method. After the characterization of the samples, the mixture study was done to mix the fractions and to fit into one of the granulometric bands specified for bases and the compaction and California Bearing Ratio tests (ISC or CBR). The obtained values  demonstrated that the recycled aggregates have a great potential to be used in base layers and sub-base stabilized granulometrically in urban pavements.