基于吸附沥青膜厚度的沥青与矿粉交互作用能力评价研究  

Study on Interaction Ability of Asphalt and Filler Based on Interfacial Adsorbed Film Thickness

作　　者：郭乃胜 于安康 王志臣 房辰泽 GUO Naisheng;YU Ankang;WANG Zhichen;FANG Chenze(School of Transportation Engineering,Dalian Maritime University,Dalian 116026,Liaoning,China;School of Transportation Engineering,Shenyang Jianzhu University,Shenyang 110168,China;School of Automotive and Mechanical Engineering,Harbin Cambridge University,Harbin 150069,China)

机构地区：[1]大连海事大学交通运输工程学院,辽宁大连116026 [2]沈阳建筑大学交通工程学院,沈阳110168 [3]哈尔滨剑桥学院汽车与机电工程学院,哈尔滨150069

出　　处：《材料导报》2023年第17期133-140,共8页Materials Reports

基　　金：国家自然科学基金(51308084);中国博士后科学基金(2020M670731);中央高校基本科研业务费专项资金(3132017029);大连海事大学“双一流”建设专项(BSCXXM021);大连市科技创新基金(2020JJ26SN062)。

摘　　要：沥青与矿粉的交互作用能力决定着沥青胶浆的路用性能,为了评价沥青与矿粉的交互作用能力并分析其作用机理,本研究采用吸附沥青膜厚度作为沥青与矿粉的交互作用评价指标,提出了基于Hashin模型、Mori-Tanaka模型和广义自洽模型的吸附沥青膜厚度计算方法,对三种计算方法进行了比较,并分析了矿粉酸碱性、试验温度和频率对沥青与矿粉交互作用能力的影响。结果表明:采用Hashin模型计算的吸附沥青膜厚度能够较好地评价沥青与矿粉的交互作用能力;矿粉中酸性SiO2含量越高,沥青与矿粉的交互作用能力越弱;当温度在软化点前后时,试验频率对沥青与矿粉交互作用能力的影响恰好相反;石灰岩矿粉与沥青的交互作用能力随着温度的增加而增大,粉煤灰颗粒表面致密的CaO-SiO2-Al2O3系统使得温度对其与沥青的交互作用能力的影响不大,煤矸石矿粉中含有的大量SiO2对其与沥青的交互作用能力产生抑制作用。The road performance of asphalt mastic is determined by the interaction ability of asphalt and filler.In order to accurately evaluate the physicochemical interaction between asphaltand filler,the asphalt-filler interaction mechanisms was analyzed.The interfacial adsorbed film thickness was used as the evaluation index of the asphalt-filler interaction in this study.New calculation methods of interfacial adsorbed film thickness were proposed based on Hashin model,Mori-Tanaka model and the generalized self-consistent model,and then the effects of filler acidity,test temperature and frequency on adsorbed film thickness were also investigated.The results show that the interaction between asphalt and filler can be more accurately evaluated by the interfacial adsorbed film thickness calculated based on Hashin model.The higher the content of acidic SiO_(2) in the filler,the weaker the interaction ability between the asphalt and filler.The influence of test frequency on interaction ability of asphalt and filler is opposite when the temperature is higher or lower than the softening point.The interaction ability of limestone filler and asphalt increases with the increase of temperature.The surface of fly ash particles is pyknotic CaO-SiO_(2)-Al_(2)O_(3) system,which makes the temperature have little effect on its interaction with asphalt.The large amount of SiO_(2) contained in coal waste filler inhibits its interaction with asphalt.

关 键 词：道路工程 沥青胶浆 交互作用能力 吸附沥青膜厚度 细观力学 

分 类 号：TU414[建筑科学—岩土工程]