基于原子力显微镜技术的沥青与矿料表面粗糙度及黏附特性
发布时间：2018-12-18 01:49
【摘要】：采用原子力显微镜技术(AFM)的轻敲和力曲线模式,在微观尺度下对沥青与矿料表面的二维图像和三维形貌信息进行采集和分析,并测试和计算表征材料物理黏结特性的表面能。测试和分析结果显示,不同油源的沥青具有明显不同的化学组分和表面粗糙度,具有蜂形结构的沥青表面粗糙度更大。老化将明显减少沥青的表面粗糙度,降低其表面能,进而对沥青与矿料的黏附产生不利影响。结合宏观的黏附拉拔力学试验,对沥青和矿料表面粗糙度、表面能与宏观拉拔强度间的关联进行统计分析。结果表明,对于含蜂形结构的沥青,沥青和矿料表面粗糙度对黏附力学性能较为重要;而对于不含蜂形结构的沥青,其与矿料的黏附性更决定于所选材料的表面能,即两种材料间的物理黏结作用。
[Abstract]:With the atomic force microscope (AFM) technique, the light tapping and force curve model of (AFM) is used to collect and analyze the two-dimensional images and 3D topography information of asphalt and aggregate surface at the micro scale. The surface energy which characterizes the physical bonding properties of the material is measured and calculated. The results of test and analysis show that the asphalt with different oil source has different chemical composition and surface roughness, and the asphalt with bee structure has more surface roughness. Aging will obviously reduce the surface roughness of asphalt and decrease its surface energy, which will adversely affect the adhesion between asphalt and aggregate. The relationship between surface roughness, surface energy and macro drawing strength of asphalt and mineral aggregate was analyzed. The results show that the surface roughness of asphalt and mineral aggregate is more important to the adhesion mechanical properties for asphalt with bee shape structure. For asphalt without bee structure, the adhesion between asphalt and mineral aggregate is more dependent on the surface energy of the selected material, that is, the physical bonding between the two materials.
【作者单位】： 哈尔滨工业大学交通科学与工程学院;哈尔滨工业大学化工与化学学院;四川省公路规划勘察设计研究院;吉林省交通科学研究所;
【基金】：国家自然科学基金(51408154) 中国博士后科学基金特别资助(2015T80357) 中央高校基本科研业务费专项资金(HIT.NSRIF.2017043)
【分类号】：U414
本文编号：2385114
[Abstract]:With the atomic force microscope (AFM) technique, the light tapping and force curve model of (AFM) is used to collect and analyze the two-dimensional images and 3D topography information of asphalt and aggregate surface at the micro scale. The surface energy which characterizes the physical bonding properties of the material is measured and calculated. The results of test and analysis show that the asphalt with different oil source has different chemical composition and surface roughness, and the asphalt with bee structure has more surface roughness. Aging will obviously reduce the surface roughness of asphalt and decrease its surface energy, which will adversely affect the adhesion between asphalt and aggregate. The relationship between surface roughness, surface energy and macro drawing strength of asphalt and mineral aggregate was analyzed. The results show that the surface roughness of asphalt and mineral aggregate is more important to the adhesion mechanical properties for asphalt with bee shape structure. For asphalt without bee structure, the adhesion between asphalt and mineral aggregate is more dependent on the surface energy of the selected material, that is, the physical bonding between the two materials.
【作者单位】： 哈尔滨工业大学交通科学与工程学院;哈尔滨工业大学化工与化学学院;四川省公路规划勘察设计研究院;吉林省交通科学研究所;
【基金】：国家自然科学基金(51408154) 中国博士后科学基金特别资助(2015T80357) 中央高校基本科研业务费专项资金(HIT.NSRIF.2017043)
【分类号】：U414
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