Effect of Dry-method SBS on the Performance of SBS-modified Epoxy Reclaimed Asphalt

Abstract

The use of epoxy resin (EP) to prepare epoxy recycled asphalt mixture can achieve the reuse of 100% reclaimed asphalt pavement (RAP). However, the high stiffness and brittleness of epoxy resin result in insufficient crack resistance of mixture. To address the issue, dry-method styrene-butadiene-styrene (DSBS) and epoxy resin were mixed with aged asphalt to prepare SBS-modified epoxy reclaimed asphalt (SERA). The micro fusion characteristics and mechanical properties of SERA were evaluated, and the optimal DSBS dosage was determined based on various tests. The results show that adding DSBS can enable the tensile toughness and low-temperature performance of SERA with less EP content to reach or exceed the performance level of epoxy reclaimed asphalt (ERA) with higher EP content. At 30% EP content, the recommended dry-method SBS content is 9%; At 40% EP content, the recommended dry-method SBS content is 5%; When the EP content is 50%, the recommended dry-method SBS content is 7%.

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Wuhan University of Technology and Springer-Verlag GmbH Germany, Part of Springer Nature