BRA岩沥青与SBS复合改性沥青及其混合料性能研究
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摘要
为了改善高速公路重车道和城市道路交叉口路段沥青路面病害突出的问题,通过对BRA与SBS复合改性沥青及其混合料性能进行了系统研究,确定了BRA与SBS适宜的掺配比例,系统评价了复合改性沥青混合料的路用性能,并将其与SBS改性沥青混合料进行了对比。试验研究结果表明:增大SBS掺量后复合改性沥青黏度显著增大,高温PG分级明显提高,但同时又会对低温性能有所弱化,工程实践中只要严格控制BRA掺量才不会对复合改性沥青低温性能造成大的影响,推荐BRA与SBS复合改性沥青中,适宜的SBS添加量为2.5%~3.0%,BRA合理掺量为6%~8%。BRA与SBS复合改性沥青可大幅改善沥青混合料的高温稳定性,其抗疲劳耐久性优于SBS改性沥青混合料;实体工程和试验段检测结果表明,BRA与SBS复合改性沥青混凝土延长了道路的使用寿命,BRA与SBS复合改性沥青混合料对于解决重载交通的车辙和水损坏问题具有较高的应用价值。
In order to improve the performance of asphalt pavement in highway lanes and section of urban road intersection.This paper did systematic study on road performance of BRA and SBS compound modified asphalt and its mixture.determined the BRA and SBS appropriate blending ratio,and SBS modified asphalt mixture are compared.Test results show that,increasing dosage of SBS composite modified asphalt viscosity increased significantly after high temperature PG rating has improved significantly,but at the same time will have weakened the performance of low temperature,as long as strictly control engineering practice BRA content will not big effects on the composite modified asphalt performance at low temperature,recommend BRA and SBS composite modified asphalt,the SBS suitable addition amount of2.5% ~ 3.0%,BRA reasonable dosage is 6% ~ 8%.BRA and SBS composite modified asphalt can significantly improve the high-temperature stability of asphalt mixture,its fatigue durability is better than that of SBS modified asphalt mixture;Entity engineering and test section test results show that the BRA and SBS composite modified asphalt concrete to prolong the life of the road,BRA and SBS composite modified asphalt mixture to solve the problem of heavy traffic of rutting and water damage has higher application value.
In order to improve the performance of asphalt pavement in highway lanes and section of urban road intersection.This paper did systematic study on road performance of BRA and SBS compound modified asphalt and its mixture.determined the BRA and SBS appropriate blending ratio,and SBS modified asphalt mixture are compared.Test results show that,increasing dosage of SBS composite modified asphalt viscosity increased significantly after high temperature PG rating has improved significantly,but at the same time will have weakened the performance of low temperature,as long as strictly control engineering practice BRA content will not big effects on the composite modified asphalt performance at low temperature,recommend BRA and SBS composite modified asphalt,the SBS suitable addition amount of2.5% ~ 3.0%,BRA reasonable dosage is 6% ~ 8%.BRA and SBS composite modified asphalt can significantly improve the high-temperature stability of asphalt mixture,its fatigue durability is better than that of SBS modified asphalt mixture;Entity engineering and test section test results show that the BRA and SBS composite modified asphalt concrete to prolong the life of the road,BRA and SBS composite modified asphalt mixture to solve the problem of heavy traffic of rutting and water damage has higher application value.
引文
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[2]王宏,刘锋.不同成型方式泡沫沥青冷再生混合料细微观结果性能研究[J].公路交通科技.2016,33(2):19-27.
[3]任瑞波,耿立涛.稳定型橡塑改性沥青混合料路用性能研究[J].公路,2015(7):11-15.
[4]余四新,丰金城.天然岩沥青复合改性沥青性能评价与应用[J].山东建筑大学学报.2015,30(5):435-440.
[5]王宏.聚酯纤维对TPS改性沥青及其混合料抗裂性能研究[J].公路,2015(10):209-213.
[6]黄文通.北美岩沥青及其混合料特性研究[D].广州:华南理工大学,2014.
[7]黄昊飞.布顿岩沥青及其混合料性能研究[D].长春:吉林大学,2015.
[8]朱桃.天然沥青岩材料性能研究[D].呼和浩特:内蒙古工业大学,2015.
[9]张悦.布顿岩沥青改性沥青结合料使用性能研究[D].西安:长安大学,2013.
[10]含天然沥青的改性沥青混合料路用性能研究[D].南宁:广西大学,2014.
[11]张小强.天然沥青对石油沥青路用性能改善的研究[D].西安:长安大学,2011.
[12]付强.岩沥青薄层沥青罩面应用技术研究[D].长沙:长沙理工大学,2010.
[13]杨光,申爱琴.季冻区橡胶粉与SBS复合改性沥青混合料性能研究[J].长安大学学报:自然科学版,2015,35(6):6-15.
[14]尹应梅,张肖宁.布敦岩沥青对沥青胶浆高温流变特性的影响[J].武汉理工大学学报,2010,3(7):85-89.
[15]邓学钧.路基路面工程[M].北京:人民交通出版社,2001.
[16]陆兆峰.天然岩沥青改性沥青路面抗车辙性能分析[J].公路交通科技,2010,27(5):19-25.