Abstract
In this new study, the effect of gamma irradiation on the waste tire rubber for its using as modified asphalt binder was elaborated. The study was initiated to investigate the anti-aging performance and rheological properties of asphalt modified crumb rubber impregnated. In this context, three samples of crumb rubber (CR) obtained from waste tire were irradiated by gamma at 100, 200 and 300kGy and used with two different percentages 5% and 10%, by mass of total asphalt binder. The modified asphalt binders (CRM) were evaluated from the perspective rolling thin film oven method (RTFO) and Brook field viscosity. The results showed that using 10% of CR subjected to gamma rays at 300kGy with asphalt had high temperature stability, low temperature ductility and anti-aging performance. Also the rheological studies illustrated that the modified asphalt binder contains CR irradiated at 300kGy have the largest adsorption of the asphalt molecules.
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