Uso de resíduos de concreto na fabricação de pavimento asfáltico

Abstract

There are several options of materials used in the paving that can represent an alternative of reutilization for construction waste. Given that in most concrete block factories the waste generated is only discarded and not reused, this can lead to numerous environmental problems. The objective of this research was to evaluate the technical viability for partial substitution of the mineral materials that compose the asphalt coating of Hot Mix Asphalt (HMA) for concrete block residues. By analyzing the values determined by the Marshall test for a mixing with 40% of the conventional aggregates replaced by recycled aggregates and comparing them with the parameters established by the National Department of Transport Infrastructure (NDTI) for this type of coating, it is observed that there is technical viability for the use of residues of concrete blocks in the manufacture of HMA and it is concluded that the concrete block residue addition in the asphalt mixture has three immediate benefits: technological benefit, because it uses 40% of the residues in the composition and fits it in the parameters established by the norms; environmental benefit, due to the consumption of the waste generated by the block factories and economic benefit, by the low APC content in the asphalt mix when compared with other studies.