Reaproveitamento de cinza de casca de arroz e PP- pós consumo

avaliação da incorporação dos resíduos nas propriedades mecânicas do concreto

Abstract

The incorporation of rice husk ash (RHA) is becoming popular due to the growing awareness of the environmental impacts resulting from the high production of common Portland cement. It is the characteristic of this residue to have a high silica content (SiO₂). Another problem is the large production of PP food packaging that is discarded after consumption without the proper destination, since these materials take hundreds of years to degrade. This article analyzes the potential of substituting different grades of cement for RHA and sand for PP for the production of sustainable concrete. The mechanical properties of the concrete are studied as part of this work and the mix was calculated to produce a 40MPa mechanical strength concrete to be used as a reference for the other mixes. The tests of resistance to axial compression, diametral and modulus of elasticity were evaluated at 28 and 90 days of cure. The use of these residues presented results similar to the reference concrete, for all the evaluated properties, and it can be concluded that with the study of traces of different contents of these residues, concrete cum can be achieved with good mechanical performance and reducing cement consumption and sand, which is a non-renewable raw material.