Estudo da utilização de resíduos de granito na produção de concreto branco

Abstract

The civil construction market has a great impact on society, positively it can be highlighted that it moves the economy and generates jobs directly and indirectly, however, it is responsible for consuming many natural resources and generating polluting waste that is discarded in nature. This work sought to verify the feasibility of using leftover granite from a marble factory as an aggregate in the production of white concrete, which is little used when compared to traditional concrete (gray), but having many benefits depending on the use. Concrete samples with the same mix, but containing different types of granite waste, were compared in terms of workability, compressive strength and color. The use of residues becomes interesting since Siena granite powder has 67.91% SiO2 in its composition, which can bring benefits from pozzolanic addition to concrete, and can also move the economy of the granite industry, transforming what was paid to be disposed of in a value-added material. For the production of white concrete, it is known that the aggregates used influence the final color, só a comparison was made of concrete with the addition of Siena granite residue, which is a lighter granite, one with the addition of darker granite, Preto São Gabriel, and another with the addition of gravel from natural extraction through the rock crushing process.