【摘要】：采用原子力顯微鏡技術(shù)(AFM)的輕敲和力曲線模式,在微觀尺度下對瀝青與礦料表面的二維圖像和三維形貌信息進行采集和分析,并測試和計算表征材料物理黏結(jié)特性的表面能。測試和分析結(jié)果顯示,不同油源的瀝青具有明顯不同的化學(xué)組分和表面粗糙度,具有蜂形結(jié)構(gòu)的瀝青表面粗糙度更大。老化將明顯減少瀝青的表面粗糙度,降低其表面能,進而對瀝青與礦料的黏附產(chǎn)生不利影響。結(jié)合宏觀的黏附拉拔力學(xué)試驗,對瀝青和礦料表面粗糙度、表面能與宏觀拉拔強度間的關(guān)聯(lián)進行統(tǒng)計分析。結(jié)果表明,對于含蜂形結(jié)構(gòu)的瀝青,瀝青和礦料表面粗糙度對黏附力學(xué)性能較為重要;而對于不含蜂形結(jié)構(gòu)的瀝青,其與礦料的黏附性更決定于所選材料的表面能,即兩種材料間的物理黏結(jié)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.
【作者單位】： 哈爾濱工業(yè)大學(xué)交通科學(xué)與工程學(xué)院;哈爾濱工業(yè)大學(xué)化工與化學(xué)學(xué)院;四川省公路規(guī)劃勘察設(shè)計研究院;吉林省交通科學(xué)研究所;
【基金】：國家自然科學(xué)基金(51408154) 中國博士后科學(xué)基金特別資助(2015T80357) 中央高校基本科研業(yè)務(wù)費專項資金(HIT.NSRIF.2017043)
【分類號】：U414

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