中南大学学报（自然科学版）2017，Vol.48Issue(11)：3092-3099,8.DOI:10.11817/j.issn.1672-7207.2017.11.033
沥青混合料动态模量梯形梁与SPT试验比较研究
Comparison of HMA dynamic modulus between trapezoid beam test and SPT
摘要
Abstract
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 of trapezoid beam test is smaller, and the dynamic moduli is smaller, while the phase angle is larger; dynamic modulus and phase angle of trapezoid beam test are more sensitive to frequency (temperature) changes. The differences of dynamic modulus and phase angle between the two methods are influenced by frequency (temperature).SBS modifier can improve dynamic mechanical property and pavement performance of asphalt mixes. Regression equation for the dynamic moduli transformation of the two methods indicates that good correlation between the dynamic modulus of the two methods can be obtained. Load modes affect dynamic modulus, and appropriate test method should be selected according to the stress state of pavement.关键词
道路工程/动态模量/梯形梁试验/简单性能试验机(SPT)Key words
road engineering/dynamic modulus/trapezoid beam test/simple performance tester (SPT)分类
交通工程引用本文复制引用
黄优,刘朝晖,王旭东,李盛..沥青混合料动态模量梯形梁与SPT试验比较研究[J].中南大学学报（自然科学版）,2017,48(11):3092-3099,8.基金项目
国家自然科学基金资助项目(51678078) （51678078）
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(kfj150304) （kfj150304）
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(kfj150102) (Project(51678078) supported by the National Natural Science Foundation of China （kfj150102）
Project(kfj150304) supported by Open Found of Key Laboratory of Road Structure and Material of Ministry of Transport, Changsha University of Science & Technology （kfj150304）
Project(kfj150102) supported by Open Fund of State Engineering Laboratory of Highway Maintenance Technology, Changsha University of Science & Technology) （kfj150102）
