期刊论文

Liu, Zhaohui(u_hwung@163.com)

中文

中南大学学报(自然科学版)

1672-7207

2017

48

11

3092-3099

10.11817/j.issn.1672-7207.2017.11.033

supported by Open Fund of State Engineering Laboratory of Highway Maintenance Technology, Changsha University of Science & Technology) 国家自然科学基金资助项目 Project 长沙理工大学公路养护技术国家工程实验室开放基金资助项目 长沙理工大学道路结构与材料交通行业重点实验室开放基金资助项目 (Project(51678078) supported by the National Natural Science Foundation of China

本校为第一且通讯机构

选用70号基质沥青和SBS改性沥青2种沥青材料、4.75 mm筛孔通过率分别为35%和55%的2种级配组合成4种沥青混合料,分别进行梯形梁和简单性能试验机(SPT)动态模量试验研究。基于时温等效原理,用非线性最小二乘法绘制参考温度为20 ℃的动态模量和相位角主曲线。研究结果表明:梯形梁和SPT试验得到的动态模量与相位角的主曲线变化趋势一致,但有明显区别;梯形梁试验的主曲线频域更窄,动态模量更小,相位角更大,且所得动态模量和相位角对频率(温度)的变化更敏感;频率(温度)也会对2种试验方法下动态模量和相位角的差异程度产生影响;SBS改性剂可以改善沥青混合料的动态力学性能及其路用性能;使用回归方程对2...

No.70 matrix asphalt (asphalt with penetration 70) and SBS modified asphalt of two gradations with 4.75 mm sieve passing percent being 35% and 55% were used to make four asphalt mixes to conduct dynamic modulus tests using trapezoid beam test and simple performance tester (SPT). Master curves of dynamic modulus and phase angle at reference temperature 20 ℃were plotted based on temperature-time transition principle using non-linear least square method. The results show that trends of the master curves of trapezoid beam test and SPT are the same. Compared with SPT, the master curve scope o...