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<p>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%.</p>

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

  • 期刊论文

  • 发表日期：

    2025年5月17日

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  • Ruochong Yang,
  • Xingyu Yi,
  • Jun Yang,
  • Shuyin Wu

摘要

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%.