掺加BRA的RAP再生沥青混合料路用性能研究

摘要:

为了减少沥青路面的永久变形，提高沥青混合料的路用性能，对BRA材料的特性进行了概述，对BRA掺量的RAP再生沥青混合料的原材料及再生混合料配合比设计进行了总结，从高温稳定性能、低温抗裂性能、水稳定性能等方面对BRA掺量的RAP再生沥青混合料路用性能进行了分析。结果表明，BRA外掺用量为2%~3%时，BRA掺量的RAP再生沥青混合料路用综合性能表现较好，适合高温多雨地区的路面施工。值得在类似项目中推广和应用。 关键词：布敦岩沥青；废旧沥青；高温稳定性、低温抗裂性、水稳定性

关键词:布敦岩沥青;废旧沥青;高温稳定性、低温抗裂性、水稳定性

Abstract:

In order to reduce the permanent deformation of asphalt pavement and improve the road performance of asphalt mixture, the characteristics of BRA materials are summarized, the raw materials and mixture ratio design of RAP recycled asphalt mixture with BRA content are summarized, and the road performance of RAP recycled asphalt mixture with BRA content is analyzed from the aspects of high-temperature stability, low-temperature crack resistance and water stability. The results show that when the dosage of BRA is 2%~3%, the comprehensive performance of RAP recycled asphalt mixture with BRA content is better, and it is suitable for pavement construction in high temperature and rainy areas. It is worth popularizing and applying in similar projects.

Key words:布敦岩沥青;废旧沥青;高温稳定性、低温抗裂性、水稳定性