煤基超硬质沥青(SHA)改性沥青与集料黏附性评价  

Research on Adhesion Evaluation of Coal-based Super Hard Asphalt(SHA)Modified Asphalt and Aggregate

作　　者：丁龙亭 申全军 魏慧 杨耀辉 樊亮 DING Long-ting;SHEN Quan-jun;WEI Hui;YANG Yao-hui;FAN Liang(Innovation Research Institute,Shandong Hi-speed Group Co.Ltd.,Jinan 250001,China;Shandong Transportation Institute,Jinan 250014,China)

机构地区：[1]山东高速集团有限公司创新研究院,济南市250001 [2]山东省交通科学研究院,济南市250014

出　　处：《公路》2024年第10期336-343,共8页Highway

基　　金：山东省交通科技计划资助项目,项目编号2020B34;山东高速集团创新研究院技术开发资助项目,项目编号CYZX-JT-2020-03。

摘　　要：为进一步对煤基超硬质沥青(SHA)改性沥青进行性能评价,分析其与集料的黏附性,基于沥青分级试验及黏附性试验,通过针入度分析及PG分级分析不同掺量煤基超硬质沥青改性沥青的性能分级,并通过水浸法与表面自由能法得出其与碱性、酸性集料的黏附性分级。研究结果表明:从地域使用环境出发,改性沥青中SHA合理使用掺量范围应小于20%;改性沥青的黏附性随SHA掺量的增加而改善,SHA能够有效改善沥青与集料的界面黏附能力,当SHA掺量由0提高至5%时,可使沥青与石灰岩黏附等级由4级升到5级,与花岗岩的黏附等级由2级升到4级,与石灰岩、花岗岩集料的黏附功分别增加0.63%、1.72%,说明SHA对酸性集料与沥青的黏附能力提高具有较好的作用。研究成果为沥青混合料中集料选择拓宽了范围。In order to further evaluate the performance of coal-based super-hard asphalt(SHA)modified asphalt and analyze its adhesion to aggregates,based on asphalt grading test and adhesion test,the performance classification of coal-based SHA modified asphalt with different content is analyzed by penetration analysis and PG classification, and its adhesion classification with alkaline and acidic aggregatesare obtained by water immersion method and surface free energy method. The results show that thereasonable amount of SHA in modified asphalt should be less than 20% in terms of regional useenvironment. The adhesion of modified asphalt is improved with the increase of SHA content, SHA caneffectively improve the interface adhesion ability of asphalt and aggregate. When the SHA content isincreased from 0 to 5%, the adhesion grade of asphalt and limestone can be changed from 4 to 5, and theadhesion grade of granite can be changed from 2 to 4. The adhesion to limestone and granite aggregatesincreases by 0. 63% and 1. 72%, respectively, indicating that SHA has a good effect on improving theadhesion ability of acidic aggregates and asphalt. The research results has broaden the scope of aggregateselection in asphalt mixture.

关 键 词：道路材料 煤基超硬质沥青 性能分级 表面能 黏附性 

分 类 号：TU535[建筑科学—建筑技术科学] U414.1[交通运输工程—道路与铁道工程]