Estudo da viabilidade técnica do uso de fibras metálicas, obtidas da reciclagem de embalagens em concretos

Abstract

The metal packaging for finishing paints, such as PVA, they are usually discarded in dumps, taking about five years for their natural degradation, causing an impact on the environment. Without any kind of reuse. It is estimated that only in the city of Porto Velho 648,000 units are discarded per year. In order to do so, it was tried to show its use as a metallic fiber added in the concrete, subjecting the composite to the tests of mechanical resistance to axial compression, diametral compression resistance, and tensile strength in bending in prismatic bodies. The results obtained are, although still early, promising mainly in the results of the tests that are obtained at the 28th day of the test specimens with the addition of fibers subjected to axial compression, diametral traction and flexural traction. The addition of metallic fibers increased the resistance, in relation to the reference concrete, of up to 20.28%, in the flexural traction in prismatic bodies, being a good indicator so that the studies can continue, in the case of a material low cost and high index present in solid waste from construction. It was observed the importance of the adjustment in the form factor, of the steel fiber, necessary to further improve the performance of the concrete. In the tests carried out by Scanning and Optical Electron Microscopy, the evident reduction of fractures is verified as the percentage of fibers in the cement matrix increases and the fiber incorporates in the concrete. These results gain social and environmental interest, inserts the steel containers in the selective collection adding an economic value to the material and the income of the people who work in recycling, while at the same time reducing the number of cans of PVA paint discarded in the landfills.