HMB高模量天然改性沥青混合料动态模量研究  

Study on Dynamic Modulus of HMB High Modulus Natural Modified Asphalt Mixture

作　　者：彭楠峰 蔡燕霞 高颖[1] 杨杰 李冷雪 PENG Nanfeng;CAI Yanxia;GAO Ying;YANG Jie;LI Lengxue(Hebei University of Engineering,Handan 056038,China;Beijing Zhonglu Gaoke Highway Technology Co.,Ltd.,Beijing 10088,China;Reserch and Development Center of Transport Industry of New Materials Technologies Application for Highway Construction and Maintenance,Beijing 10088,China;Research Institute of Highway Ministry of Transport,Beijing 10088,China;China Construction Road and Bridge Group Co.,Ltd.,Handan 056000,China)

机构地区：[1]河北工程大学土木工程学院,河北邯郸056038 [2]中路高科(北京)公路技术有限公司,北京100088 [3]公路建设与养护新材料技术应用交通运输行业研发中心,北京100088 [4]交通运输部公路科学研究院,北京100088 [5]中建路桥集团有限公司,河北石家庄056000

出　　处：《粉煤灰综合利用》2023年第6期93-98,共6页Fly Ash Comprehensive Utilization

基　　金：国家自然科学基金(E080703)。

摘　　要：为探究高模量天然改性沥青混合料的动态模量及其主曲线的变化规律,以高模量天然沥青(HMB)为沥青胶结料,制备EME20、AC20两种不同级配的沥青混合料,使用SPT简单性能仪,在不同温度和频率下对两种不同级配沥青混合料的动态模量进行检测,分析了温度和频率对沥青混合料动态模量的影响;基于时温等效原理,通过非线性最小二乘法拟合得到高模量沥青混合料的主曲线方程。结果表明:在同一温度下,沥青混合料动态模量随荷载频率的增加而提高,在同一频率下,沥青混合料的动态模量随着温度的升高而降低;通过试验测得两种不同级配沥青混合料的动态模量,再应用所得动态模量数据拟合出动态模量主曲线,算出不同温度下的移位因子,得出的动态模量主曲线方程,对其不同温度下的动态模量进行分析,预测分析出EME-20级配沥青混合料的高低温性能要优于AC-20级配沥青混合料。In order to explore the dynamic modulus of natural modified asphalt mixture with high modulus of HMB and the change law of its main curve,HMB was used as asphalt binder to prepare EME20 and AC20 asphalt mixture with different levels of composition.SPT simple performance instrument was used to detect the dynamic modulus of two kinds of asphalt mixture with different levels of composition at different temperatures and frequencies.The influence of temperature and frequency on dynamic modulus of asphalt mixture is analyzed.Based on the time-temperature equivalence principle,the principal curve equation of high modulus asphalt mixture is obtained by nonlinear least square fitting.The results show that the dynamic modulus of asphalt mixture increases with the increase of load frequency at the same temperature,and decreases with the increase of temperature at the same frequency.The dynamic modulus of two kinds of asphalt mixture at different levels is measured by test,and then the dynamic modulus data is applied to fit the dynamic modulus master curve,and the shift factor at different temperatures is calculated.The dynamic modulus master curve equation is obtained,and the dynamic modulus at different temperatures is analyzed.It is predicted that the high and low temperature performance of EME-20 graded asphalt mixture is better than that of AC-20 graded asphalt mixture.

关 键 词：高模量沥青混合料 HMB沥青 油石比设计 SPT试验 动态模量主曲线 

分 类 号：U416[交通运输工程—道路与铁道工程]