摘要
针对玄武岩纤维表面较为光滑,与乳化沥青冷再生混合料界面结合力较弱等问题,采用硅烷偶联剂(KH550)对其进行表面处理.采用锥入度试验对比偶联改性纤维和基质纤维对乳化沥青抗剪切性能的影响.通过网篮吸持性试验、表面自由能接触角试验分析硅烷偶联改性纤维与乳化沥青界面结合能力的改善作用.结果表明:随着MBF、BF掺量的增加,乳化沥青的锥入度值在逐渐下降,剪切强度逐渐升高.相同掺量下,硅烷偶联改性玄武岩纤维和玄武岩纤维对乳化沥青的最佳吸持率分别为285.92%、211.83%,最佳吸持率增加了72.33%.硅烷偶联改性纤维的粘附功为54.04 MJ/m^(2),比玄武岩纤维的44.17 MJ/m^(2)增长了9.87%.硅烷偶联改性玄武岩纤维提升了与乳化沥青的界面结合能力得到明显改善.
Aiming at the problems of smooth surface of basalt fiber and weak interface binding force with emulsified asphalt cold recycled mixture, silane coupling agent(KH550) was used to treat its surface. The cone penetration test was used to compare the effects of coupling modified fiber and matrix fiber on the shear resistance of emulsified asphalt. The improvement of interfacial bonding ability between silane-coupled modified fiber and emulsified asphalt was analyzed by net basket adsorption test and surface free energy contact angle test. The results show that with the increase of MBF and BF content, the cone penetration value of emulsified asphalt gradually decreases and the shear strength gradually increases. At the same dosage, the best retention rates of silane coupling modified basalt fiber and basalt fiber to emulsified asphalt are 285.92% and 211.83% respectively, and the best retention rate is increased by 72.33%. The adhesive work of silane coupling modified fiber is 54.04 MJ/m^(2), which is 9.87% higher than that of basalt fiber(44.17 MJ/m^(2)). Silane coupling modified basalt fiber enhances the interfacial bonding ability with emulsified asphalt and improves obviously.
作者
白文君
孔林
徐浩
BAI WenJun;KONG Lin;XU Hao(Nanning Architectural Planning and Design Group Co.Ltd.,Nanning 530002,China;School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China)
出处
《武汉理工大学学报（交通科学与工程版）》
2022年第5期883-888,共6页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国家自然科学基金(51978116)
重庆市研究生科研创新项目(CYS21342)。
关键词
玄武岩纤维
界面结合能力
锥入度
乳化沥青
basalt fiber
interfacial bonding capacity
penetration test
emulsified asphalt
