摘要
水损坏是沥青路面的主要病害之一。从微纳观尺度研究水分对于沥青、沥青-集料界面的影响,有助于深入理解沥青混合料水损坏机理,进而指导水损坏的防治。原子力显微镜(AFM)可从微纳观尺度观测沥青的表面形貌并测定微观力学指标,为研究沥青微观结构及沥青-集料界面粘附特性在水分作用下的衰变规律提供了有效技术手段。论文综述了近年来基于AFM的沥青混合料水损坏研究进展,重点论述了AFM形貌图与微观力学指标在沥青混合料水损坏研究中的应用情况,提出综合应用AFM、表面能理论及分子动力学模拟等多种研究方法,可从力学特性、能量变化和分子结构等多角度深入研究水损坏的进程与机理。
Moisture damage is one of major distresses of asphalt pavement. Researches on micro-nano scale related to moisture influence on asphalt binder and asphalt-aggregate interface are beneficial to understand the damage mechanism deeply and look for preventive measures. Atomic force microscope（ AFM） can show surface appearance and measure mechanics indexes of asphalt on micro-nano scale, which provides an effective method to explore asphalt microstructure and adhesive property decay law on asphalt-aggregate interface affected by water. This article reviews research progress on moisture damage based on AFM in recent years, mainly discussing the application of AFM topography and micro-mechanics indexes in moisture researches. Combined with surface free energy method, molecular dynamic simulation etc., AFM can be applied to explore process and mechanism of moisture damage in terms of mechanical property, energy change, molecular structure and other angles.
出处
《石油沥青》
2018年第1期31-37,共7页
Petroleum Asphalt
基金
国家自然科学基金资助项目(51378393)
