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不同改性剂对沥青黏结及抗水损害性能的影响
Effects of Various Modifiers on the Bond Property and Moisture Damage Resistance of Asphalt
投稿时间:2020-04-17  修订日期:2020-06-30
DOI:103969/j.issn.1007 9629202102021
中文关键词:  沥青  内聚性能  黏附性能  抗水损害  拉拔试验  路用性能
英文关键词:asphalt  cohesion property  adhesion property  moisture damage resistance  binder bond strength test  road performance
基金项目:国家自然科学基金资助项目(51778481,51978518,51908426)
           
作者单位
周璐
ZHOU Lu
同济大学道路与交通工程教育部重点试验室,上海201804
Key Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji University, Shanghai 201804, China
黄卫东
HUANG Weidong
同济大学道路与交通工程教育部重点试验室,上海201804
Key Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji University, Shanghai 201804, China
吕泉
L Quan
同济大学道路与交通工程教育部重点试验室,上海201804
Key Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji University, Shanghai 201804, China
郑茂
ZHENG Mao
四川交投建设工程股份有限公司,四川成都610000
Sichuan Jiao Tou Construction Engineering Co., Ltd., Chengdu 610000, China
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中文摘要:
      利用拉拔试验(BBS试验),研究了5种道路常用改性剂(SBS、橡胶颗粒、TB胶粉、岩沥青、多聚磷酸)及其掺量对沥青内聚性能和黏附性能的影响,并在此基础上进行了5种改性沥青混合料的肯塔堡飞散试验和浸水汉堡车辙试验.结果表明:SBS改性剂会阻碍沥青与集料表面的黏附,但能够提高沥青的内聚性能,延长沥青的荷载承受能力;橡胶颗粒和TB胶粉均会造成沥青内聚性能和黏附性能的下降,岩沥青能够显著提高沥青的内聚性能和黏附性能,多聚磷酸则会明显降低沥青的水敏感性、改善其黏附性能;不同改性沥青混合料抗松散性能和抗水损害性能的排序为:20%岩沥青改性沥青混合料>45%SBS改性沥青混合料>04%多聚磷酸改性沥青混合料>基质沥青混合料>15%橡胶沥青混合料>20%TB胶粉沥青混合料.
英文摘要:
      The binder bond strength(BBS) test was conducted to evaluate the effects of five typical modifiers(SBS, crumb rubber, terminal blend rubber, gilsonite and polyphosphoric acid) on the cohesion and adhesion properties of asphalt respectively. Various contents were also investigated. Cantabro and wet Hamburg wheel tracking(HWT) tests were also performed. The results show that SBS modifier would hinder the adhesion process between asphalt and aggregate, however, it enhances the cohesive performance and extends the load bearing capacity of asphalt. Both crumb rubber and terminal blend rubber harm the asphalt cohesion and adhesion behavior. Gilsonite significantly improves both the cohesion and adhesion strength while polyphosphoric acid can reduce the moisture sensitivity and improve the asphalt adhesion performance. The ranking evaluation of raveling and moisture damage resistance of different asphalt mixtures is obtained through Cantabro and wet HWT tests, and the accuracy and effectiveness of the BBS test in evaluating the asphalt raveling resistance and moisture damage resistance are valid.
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