BRA 与 SBR 复合改性沥青及其混合料技术性能研究

摘要

In order to compensate for technical deficiencies BRA modified asphalt low temperature cracking performance,this paper proposes the use of SBR BRA complex with its improvement plan. Through the BRA and the rheological properties of the composite SBR modified asphalt under different BRA content,as well as composite modified asphalt pavement performance studies,results showed that, BRA content in the 10% ~15% compound modified asphalt mixture comprehensive road performance best,BRA and SBR modified asphalt composite various road performance can be achieved even more than the SBS modified asphalt mixture.%为了弥补 BRA 改性沥青低温抗裂性能方面的技术缺陷，提出采用 SBR 与 BRA 复配方案对其进行改善。通过对不同 BRA 掺量下的 BRA 与 SBR 复合改性沥青流变特性，以及复合改性沥青混合料路用性能研究，结果表明，BRA 掺量在10％～15％时，复合改性沥青混合料综合路用性能最佳，BRA 与 SBR 复合改性沥青混合料的各项路用性能可达到甚至超过了 SBS 改性沥青混合料。