SILVA, R. V.; SILVA, Rafael Vieira da.
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%.
