摘要
为了深入研究水泥填料改性沥青的优化性能,推进沥青材料在高等级公路路面中的广泛应用,降低沥青混凝土路面建设成本,试验选用填料与沥青质量比m c/m a为0.2、0.3、0.4、0.5、0.6、0.8等6种比例制备掺入水泥(C)和矿粉(MP)填料的沥青胶浆,对其路用性能进行了基本指标测定、标准黏度测定、动态剪切流变测定、弯曲梁流变测定,利用扫描电镜和红外光谱仪对水泥改性沥青胶浆微观机理进行分析,评判水泥替代矿粉的可行性,得到水泥改性沥青胶浆的合理m c/m a比例。研究结果表明,选用水泥改性沥青材料,m c/m a在0.4~0.6范围时对沥青胶浆材料的抗剪强度,耐高温性能和抗车辙能力有较大幅度的提升,研究成果为水泥替代矿粉作为填料增强沥青混凝土路用性能的可行性提供了依据。
The purpose is to further study the optimized performance of cement filler modified asphalt,improve the extensive application of asphalt materials in high-grade highway pavement,and reduce the construction cost of asphalt concrete pavement.The asphalt mortar mixed with cement(c)and mineral powder(MP)filler was prepared by m c/m a(mass ratio of filler to asphalt)of 0.2,0.3,0.4,0.5,0.6 and 0.8.The basic index test,standard viscosity test,dynamic shear rheological test(DSR)and bending beam rheological test(BBR)were carried out for its road performance.Scanning electron microscope and infrared spectrometer were used to analyze the micro mechanism of cement modified asphalt mortar,evaluate the feasibility of replacing mineral powder with cement,and obtain the reasonable m c/m a ratio of cement modified asphalt mortar.The research results show that when m c/m a is in the range of 0.4~0.6,the shear strength,high temperature resistance and rutting resistance of asphalt mastic material are greatly improved.The research results provide a basis for the feasibility of using cement instead of mineral powder as filler to modify the performance of asphalt concrete.
作者
雷小磊
崔玉龙
LEI Xiaolei;CUI Yulong(School of Civil Construction,Anhui University of Science&Technology,Huainan 232001,China)
出处
《宿州学院学报》
2020年第10期75-80,共6页
Journal of Suzhou University
基金
国家自然科学基金青年项目(41807267)。
关键词
水泥
改性沥青
沥青胶浆
路用性能
微观机理
Cement
Modified asphalt
Asphalt mortar
Road performance
Micro mechanism
作者简介
雷小磊(1984-),安徽萧县人,硕士,实验师,研究方向:道路工程材料、路基路面工程的施工及维护技术和应用;通信作者:崔玉龙(1989-),安徽蚌埠人,博士,副教授,研究方向:边坡工程。
