摘要
采用多相改性工艺制备高模量沥青,旨在实现胶结料的高温抗变形能力与低温抗裂性能的协同提升。选取70号基质沥青、橡胶改性沥青与复合型高模量沥青三种胶结材料,系统开展了常规物理性能、PG分级、多应力重复蠕变(MSCR)及零剪切粘度(ZSV)等试验,全面评价其流变特性与高温性能差异。进一步以AC-20中面层沥青混合料为研究对象,对三种胶结料配制的混合料开展车辙、冻融劈裂与低温抗裂性能测试。结果表明,高模量沥青在高温稳定性方面表现最为优异,橡胶改性沥青则在弹性恢复与低温韧性方面具有优势,而基质沥青性能整体较弱。该研究结果为高模量橡胶改性复合沥青在结构型路面中面层的工程化应用提供了理论依据与技术支持。
In this study,a multiphase modification process was adopted to prepare high modulus asphalt,aiming to achieve the synergistic improvement of the high-temperature anti-deformation ability and low-temperature anti-cracking performance of the binder.Three cementitious materials,namely 70#base asphalt,rubber modified asphalt and composite high modulus asphalt,were selected.Tests such as conventional physical properties,PG classification,multi-stress repetitive creep(MSCR)and zero shear viscosity(ZSV)were systematically carried out to comprehensively evaluate the differences in rheological properties and high-temperature performance.Further,taking the asphalt mixture in the middle layer of AC-20 as the research object,the rutting,freeze-thaw splitting and low-temperature crack resistance performance tests were carried out on the mixtures prepared with three kinds of cementing materials.The results show that high modulus asphalt performs the best in terms of high-temperature stability,rubber-modified asphalt has advantages in elastic recovery and low-temperature toughness,while the overall performance of base asphalt is relatively weak.The results of this study provide a theoretical basis and technical support for the engineering application of high modulus rubber modified composite asphalt in the surface layer of structural pavement.
作者
王友根
甘先永
Wang Yougen;Gan Xianyong(Hunan Yiyang Highway Bridge Construction Co.,Ltd.,Yiyang Hunan 413000,China;School of Transportation Engineering,Changsha University of Science and Technology,Changsha Hunan 410000,China)
出处
《山西建筑》
2025年第19期135-138,共4页
Shanxi Architecture
基金
2022年湖南省交通运输厅科技项目:旧水泥混凝土路面全厚度移动破碎就地冷再生利用成套技术研究(项目编号:202227)。
关键词
高模量沥青
橡胶改性沥青
蠕变试验
零剪切粘度
路用性能
high modulus asphalt
rubber modified asphalt
creep flexibility test
zero shear viscosity
road performance
