期刊论文

Research on suitable mixing amount for BRA modified asphalt mixture AC-13C

中文

交通科学与工程

1674-599X

2015

31

2

1-5+33

10.16544/j.cnki.cn43-1494/u.2015.02.001

国家自然科学基金项目（51078045）；

本校为第一机构

依托湖南凤大高速公路BRA改性沥青路面试验段,选取5种BRA掺量,对BRA改性沥青混合料BAC-13C的配合比设计和路用性能进行了研究。研究结果表明：BRA中天然沥青可替代部分基质沥青,矿物质可替代部分细集料和矿粉;随着BRA掺量的增加,基质沥青最佳油石比呈线性减小,但其减小量小于BRA中天然沥青的增加量,故BRA改性沥青混合料的总最佳油石比略高于普通沥青混合料的0.1%~0.2%。BAC-13C的各项路用性能均达到改性沥青混合料的技术要求,且BRA的掺入可显著提高沥青混合料的高温稳定性、水稳定性及抗拉强度,但对低温抗拉能力有所影响。因此,BRA改性沥青混合料具有优良的路用性能,适合于南方湿热地区高等级公...

Relying on the experimental section of BRA modified asphalt pavement of Feng-Da Expressway in Hunan Province,five kinds of BRA mixing amount were selected to carry out for the mixture ratio design and the pavement performance tests for the BRA modified asphalt mixture of BAC-13 C.The results show that the natural asphalt within BRA can partially replace the base asphalt,and the minerals can partially replace the fine aggregates and mineral powder.With the increase of BRA mixing amount,the optimum asphalt-aggregate ratio of base asphalt decreases linearly,but the decreasing amount is less than ...