Experimental Analysis to Evaluate the Impact of Styrene-Butadiene-Styrene and Crumb Rubber on the Rutting and Moisture Resistance of Asphalt Mixtures

The most severe distresses in asphalt pavement are rutting, fatigue, and low-temperature cracking; therefore, to solve these problems, it is essential modify binders concrete mixtures. In this study, a comparison between using styrene-butadiene-styrene (SBS) crumb rubber (CR) as modifiers for overcome distress issues was conducted. Base SBS or CR-modified were subjected all conventional Superpave binder tests. Engineering tests such the Hamburg wheel tracker indirect tensile strength ratio also run evaluate engineering properties. used percentages 1, 2, 3, 4, 5%, while CR 6, 9, 12, 15% by total weight. results showed lower penetration, higher softening point, viscosity, elastic recovery both additives. addition, dynamic shear rheometer (DSR) bending beam (BBR) increasing values of high low temperatures modified performance grade (PG) with percent. best properties at 3% 9% CR, optimum A triple percentage needed get same effect mixture.