Viabilidade de aplicação do resíduo sólido polimérico (SBR) da indústria calçadista na confecção de elementos construtivos.

Abstract

The aim of this work is to study the viability of the application of SBR waste compound - styrene butadiene rubber derived from the footwear industry, in the production of constructive elements. The SBR waste obtained passed through various processes and analyses, in terms of physical-chemical-mineralogical, among them were determination of particle size, characterization of the extract leachate, determination of the pH concentration over time, determination of the water absorption, thermal treatment, thermogravimetric analyses (TGA), energy dispersive spectroscopy analyses (EDS), analyses of the porosity determination, analyses of the infrared spectroscopy (FTIR) and scanning electron microscopy analyses (MEV). For the verification of its properties and behavior when inserted into cementitious matrices, along with sand in various dosages and water/cement factors, tests were performed in specimens to determine compressive strength and tension strength in flexion. Through the obtained results it was verified that the waste has a density d = 0.330; presents hydrophobic characteristics with water absorption of 10% during 96h of immersion, releases heavy metals in water when exposed directly however can be isolated when encapsulated by cement paste; difficult interaction with the binder as a consequence of its internal physical structure and external texture; the thermal treatment of the waste bellow 200°C does not present significant improvements in the confected specimens, exposed between 200°C to 750°C, the material degrades loosing 68% of its mass; it is quite porous with contents of 57%, allows the confection of bricks through forms with 48h rest. Values over 4MPa were obtained from the tests of compressive strength in the specimens made with factorw/c = 0.333.