Análise da adição de resíduos de corpos de prova de concreto à brita graduada simples em bases de pavimentos

Abstract

The civil construction industry generates a large amount of waste, including concrete test specimens used to verify their compressive strength. When improperly disposed of, this material generates negative impacts on the environment, making it necessary to seek sustainable alternatives. This study investigates the feasibility of incorporating these concrete test specimen residues into simple graded aggregate (SGA) in pavement base layers. For this analysis, samples of concrete waste and SGA were collected, which underwent crushing and dosing processes. Different mixtures with varying proportions of residue (10%, 20% and 100%) were prepared and subjected to normative tests, such as granulometric analysis, California Bearing Ratio (CBR), Los Angeles abrasion test, sand equivalent and flatness, according to standards established by the National Department of Transport Infrastructure and the Paraná State Department of Roads. The results demonstrated that the addition of these residues, despite affecting the mechanical and physical properties of BGS, leads to obtaining indices that still satisfy current standards. In some cases, laboratory tests showed improvement in resistance parameters, resulting in a CBR greater than 220% for certain materials. Thus, its use becomes technically viable in the execution of pavement bases. Furthermore, the reuse of waste can reduce the impacts associated with its irregular disposal, as well as environmental implications generated by the exploitation of natural aggregate deposits. Thus, the study contributes to the development of sustainable solutions in civil engineering, promoting the reuse of materials without damaging the quality of road structures.