摘要
有关沥青混合料水损坏机理研究尚未形成公认理论体系,尤其微观尺度方面研究未见报道,严重影响了有关沥青路面各项性能的研究。文中从原子分子层面入手,研究剖析了不同性质石料与沥青、水三方相互间共同作用机制,提出了基于晶体表面悬键的水分子作用机理,建立起“晶体表面态”理论,进而提出“反氢键能表面修饰与强化界面键能”双机制作为改善水稳定性原则。研究试验了采用碳氢基团,并借助Si—O—Si键合对集料实施表面修饰,实现了双机制原则对油石界面的改善。结果表明基于晶体表面态理论和双机制原则改善的试验,不仅大大提高了油石界面抗剥离性能和水稳定性能,也能显著提高沥青混合料路用性能,最后指出了基于油石界面微结构的研究方向。
Regarding the research on the water damage mechanism of asphalt mixtures,a generally accepted theoretical system has not been formed,especially in micro-scale studies,which seriously affects the performance of asphalt pavement.Starting from the atomic and molecular level,this paper studies and analyzes the mechanism of interaction between different properties of stone,asphalt and water,and proposes the mechanism of water molecules based on the dangling bonds of the crystal surface,thus establishing the“crystal surface state”theory.Furthermore,the dual mechanism of“surface modification of anti-hydrogen bond energy and strengthening of interface bond energy”was proposed as the principle of improving water stability.The study tested the use of hydrocarbon groups and the surface modification of aggregates with the help of Si-O-Si bonding to achieve the improvement of the whetstone interface by the double mechanism principle.The results show that the experiments based on the improvement of the crystal surface state theory and the double mechanism principle not only greatly improved the anti-stripping performance and water stability of the oil-stone interface,but also significantly improved the road performance of asphalt mixture.research direction.
作者
樊丽辉
王新强
赵庆国
蓝清
樊星
Fan Li-hui;Wang Xin-qiang;Zhao Qing-guo;Lan Qing;Fan Xing(Hebei Provincial Communications Planning and Design Institute, 050091, Shijiazhuang, Hebei, China;School of Transportation and Civil Engineering, Hebei University of Technology, 300401, Tianjin, China;Hebei University of Water Resources and Electric Engineering, 061001, Cangzhou,Hebei, China;Hebei Luhe Communications Technology Co., Ltd., 050051, Shijiazhuang, Hebei, China)
出处
《河北水利电力学院学报》
2020年第3期14-21,共8页
Journal of Hebei University Of Water Resources And Electric Engineering
基金
河北省科技计划自筹项目(16211247)。
关键词
沥青混合料
水损害
晶体表面态
表面再重组
机理
asphalt mixture
sater damage
surface state of crystal
surface recombination
mechanism
