废旧沥青混合料再生效果研究

Study on Regeneration Effect of Waste Asphalt Mixture

摘要: 沥青混合料再生利用技术能实现公路建设过程中材料的高效循环利用，是公路建设可持续发展的大势所趋。本文采用R2、R3两种不同粘度的再生剂，制备旧料掺量为40%的再生沥青混合料，通过浸水马歇尔稳定度试验、车辙试验、低温弯曲试验等一系列室内试验对再生沥青混合料的水稳性能及高、低温稳定性等及两种再生剂再生效果进行了评价。试验结果表明，两种沥青再生剂均可以显著提升废旧沥青混合料的各项性能指标。

Abstract: Asphalt mixture recycling technology can realize the efficient recycling of materials in the process of highway construction, which is the general trend of sustainable development of highway construction. In this paper, the recycled asphalt mixture with 40% old material content is prepared by using two kinds of regenerants with different viscosity R2 and R3. Through a series of indoor tests such as immersion Marshall stability test, rutting test and low-temperature bending test, the water stability, high and low-temperature stability of the recycled asphalt mixture and the regeneration effect of the two regenerants are evaluated. The test results show that both asphalt regenerants can significantly improve the performance indexes of waste asphalt mixture.