Utilização de agregado reciclado em substituição de agregado natural reforçado com fibra de aço

Abstract

This work focuses on the research and use of recycled aggregate from the use of RCD (construction and demolition waste) for partial replacement of natural coarse aggregate in the manufacture of concrete for possible structural use. Partial replacements were made with 10% and 20% recycled aggregate. The relevance of the work is due to the manufacture of concrete with recycled aggregate and reinforced with steel fiber, since recycled aggregate tends to influence the mechanical behavior of concrete. Six experimental groups were created, two for reference and four for comparison. Each group comprised eight cylindrical specimens (dimensions of 100 mm x 200 mm) and a beam (dimensions of 150 mm x 150 mm x 600 mm). The results indicated the feasibility of replacing up to 20% of natural aggregate with recycled aggregate, according to the processing procedures outlined in this study, particularly in relation to compression properties. Furthermore, the validity of substitution of up to 10% for evaluations of tensile strength in compression was verified, showing an analogous behavior between the corresponding samples.