Avaliação das propriedades físicas e mecânicas do concreto incorporado com resíduo de mármore em pó.

Abstract

The activities of the ornamental stone industry generate enormous amounts of solid waste, which negatively impacts the environment. Concrete is obtained by appropriate mixing of cement, fine aggregate and aggregate and water. In some situations, chemicals or other components, such as microsilica, polymers, etc., are incorporated. The present work has as objective to evaluate the physical and mechanical properties of the concrete incorporated with marble dust, generated during the processing of the marble slabs. Physical, chemical and mineralogical characterization tests were carried out, namely: X-ray fluorescence, X-ray diffraction, thermo-differential analysis, thermal gravimetric analysis for the marble residue. After the characterization of the materials, the dosage study was carried out using ABCP - Brazilian Portland Cement Association methodology. By establishing the proportions of the materials and the trace of the concrete 1: 2.44: 1.87 with the water / cement factor of 0.54, 10 cm x 20 cm specimens were molded with partial replacement of the small aggregate by marble dust in the percentages of 10% and 20%, and the mechanical properties, compressive and tensile strength. It was observed that the replacement of the conventional small aggregate (quartz sand) with marble dust caused a reduction of resistance of 40.33% and 36.9%, respectively, for the contents of 10% and 20%.