摘要
为了改善排水式沥青路面的路用性能及延长其使用年限,选用高黏剂(LT-HVA)及玄武岩纤维(BF)稳定剂制备玄武岩纤维排水式高黏沥青混合料。排水式沥青混合料因其良好的透水性能及降噪能力而被广泛应用到夏季多雨地区,但其空隙率较大会导致内部结构受到外界多重因素的侵扰而破坏,沥青与骨料之间黏附能力衰退较快,沥青胶浆易从骨料之间剥落,影响沥青路面的使用年限及服务水平。在OGFC-13排水式沥青混合料中掺入高黏剂及玄武岩纤维,以期延缓沥青路面结构层病害的出现,改善沥青路面的路用性能。在沥青、高黏剂、玄武岩纤维等原材料性能研究的基础上,制备玄武岩纤维高黏沥青,通过动态剪切流变试验评价玄武岩纤维及高黏剂对沥青流变性能的影响。通过配合比设计,确定沥青、高黏剂、玄武岩纤维不同掺配组合下沥青混合料的最佳油石比。通过对沥青混合料开展高温抗车辙、低温抗开裂、抗水损害及抗疲劳等相关试验来验证OGFC-13排水式沥青混合料路用性能。结果表明:高黏剂及纤维的掺入,能够改善沥青的温度敏感性;高黏剂及纤维的掺入均能改善混合料的路用性能,其中SBS+LT-HVA+BF(9 mm, 3%)OGFC-13沥青混合料高温稳定性、水稳定性及抗疲劳性能最优,SBS+LT-HVA+BF(12 mm, 0.3%)OGFC-13沥青混合料低温性能最优。
In order to improve the road performance of porous asphalt pavement and extend its service life, basalt fiber porous high viscosity asphalt mixture is prepared by using high viscosity agent(LT-HVA) and basalt fiber(BF) stabilizer. Porous asphalt mixture is widely used in rainy areas in summer because of its good water permeability and de-noise ability, but its large void ratio will cause the internal structure to be damaged by the intrusion of multiple external factors, the adhesion between asphalt and aggregate declines rapidly, and the asphalt mortar is easy to peel off from the aggregate, which affects the service life and service level of asphalt pavement. OGFC-13 porous asphalt mixture is mixed with high viscosity agent and basalt fiber in order to delay the occurrence of diseases in asphalt pavement structural layer and improve the road performance of asphalt pavement. Based on the study of the properties of asphalt, high viscosity agent, basalt fiber and other raw materials, the basalt fiber high viscosity asphalt is prepared. The influence of basalt fiber and high viscosity agent on the rheological properties of asphalt is evaluated by dynamic shear rheological test. The best asphalt-aggregate ratio of asphalt mixture under different mixing combinations of asphalt, high viscosity agent and basalt fiber is determined by mix design. The pavement performance of OGFC-13 porous asphalt mixture is verified by the tests of high-temperature rutting resistance, low-temperature cracking resistance, water damage resistance and fatigue resistance, etc. The result shows that(1) the addition of high viscosity agent and fiber can improve the temperature sensitivity of asphalt;(2) the addition of high viscosity agent and fiber can improve the pavement performance of the mixture, among them, SBS+LT-HVA+BF(9 mm, 3%) OGFC-13 asphalt mixture has the best high-temperature stability, water stability and fatigue resistance, and SBS+LT-HVA+BF(12 mm, 0.3%) OGFC-13 asphalt mixture has the best low-temperature performance.
作者
李俊峰
李文凯
李正强
邵景干
黄运军
LI Jun-feng;LI Wen-kai;LI Zheng-qiang;SHAO Jing-gan;HUANG Yun-jun(Henan College of Transportation,Zhengzhou Henan 450046,China;Henan College of Transportation Engineering Technology Group Co.,Ltd.,Zhengzhou Henan 450046,China;Henan Henan-Shanxi Expressway Co.,Ltd.,Zhengzhou Henan 450046,China)
出处
《公路交通科技》
CAS
CSCD
北大核心
2022年第9期1-8,共8页
Journal of Highway and Transportation Research and Development
基金
交通运输部重点科技项目(2021-TG-001)
河南省交通运输科技计划项目(2021J5)。
关键词
道路工程
路用性能
性能对比
沥青混合料
玄武岩纤维
road engineering
road performance
performance comparison
asphalt mixture
basalt fiber
