掺加BRA的RAP再生沥青混合料路用性能研究

Study on Pavement Performance of RAP Recycled Asphalt Mixture with BRA

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。该混合料值得在类似项目中推广和应用。

In order to reduce the permanent deformation of asphalt pavement and improve the pavement performance of asphalt mixture,the characteristics of BRA materials are summarized.The raw materials of RAP recycled asphalt mixture with BRA content and the design of mix proportion of recycled mixture are summarized.The pavement 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 pavement performance of RAP recycled asphalt mixture with BRA content is better,and it is suitable for the pavement construction in high temperature and rainy areas.The mixture is worth popularizing and applying in similar projects.