Utilização de resíduos cerâmicos da cidade de Porto Velho na produção de concretos

Abstract

The present work proposes to evaluate the partial replacement of Portland cement by residues of ground ceramic bricks, originating in the Porto Velho / RO, for concrete production. For this, concrete were produced with the contents of 0%, 10%, 20% and 30% by weight of clay residues calcined clay replacing the Portland cement. Mechanical strength tests on compression and diametric compression traction were carried out on the concretes produced. The results were satisfactory when the pozzolanic addition was 20% instead of the binder material. At this time, the compressive strength losses were close to 8% at 28 days after molding. The same should be observed for the diametric compression tensile strength whose results were very close in all samples and unique when replacing Portland cement with ground brick residues in the percentage of 20%. The other tests: granulometry, modulus of fineness, specific mass of the aggregates, water absorption, voids index, specific mass of the concretes were complements, although necessary, to determine the characterization and knowledge of the durability of the formulated mixture. Based on the results of laboratory tests it is acceptable to partially replace the cement with residues of calcined and ground ceramic bricks, even with partial losses of properties of the mechanical resistance.