Modificação estrutural do cimento asfáltico do petróleo (CAP) com resíduos poliméricos da indústria calçadista, para utilização em pavimentos flexíveis.

Abstract

The Brazilian pavement engineering, currently experiencing a very challenging reality, the significant increase in traffic, combined with a strong need for innovation to meet the deficiencies and bottlenecks in the road sector. In contrast, the footwear industry generates high levels of polymeric solid waste, liabilities these can be incorporated into asphalt to improve its properties cements. Therefore, this study had the overall goal caracterize the asphalt cement of oil (CAP), modified with polymeric wastes from industrial footwear segment (RCA), to assess the effects of this modified asphalt binder , based on pure asphalt, due to the incorporation of waste for use in flexible asphalt paving. were performed the study of the characterization thermal and rheological of asphalt cements modified CAPM1, CAPM2 and CAPM3. For comparison, was used the asphalt CAP 50/70, arising from LUBNOR/CE. The asphalt binder was modified by the incorporation of waste from footwear, consisting of elastomer Styrene Butadiene Rubber (SBR) and styrene thermoplastic elastomer Vinyl Acetate (EVA) , called RCA , besides the residual silicate rocks (RRS). The effects resulting from the modification were evaluated and the parameters investigated aimed to evaluate the usual problems such as: permanent deformation, thermal cracks and oxidation. The modified binders was characterized through by Thermogravimetry, Differential Scanning Calorimetry, DTA, MEV, FTIR, viscosity in equipment BROOKFIELD, as well with empirical tests such as: Softening Point, Penetration, point of burn, Rheology evaluated through tests DSR, aging RTFOT simulated and stability by analyzing at MARSHALL. The aging oxidative of the CAP PURE was measured from the analysis of infrared spectra, in addition to the variation of the complex dynamic modulus of shear after RTFOT. The results showed that the modified asphalts differ in CAP pure, when compared to their thermal stability, degradation, resistance to aging resistance, penetration and rheology.The presence of RCA increased asphalt resistance the oxidative process caused an increase in viscosity so as not linear indicating that the polymers are not inert additives. The Non-Newtonian behavior was observed for modified binders. The results allow us to infer that the CAP Modified highly affected by factors such as temperature and oxygen. The techniques such as FTIR, TGA and DSC were consistent in showing. It was also found that modification of CAP with RCA, contributes to more resistant to permanent deformation.