复杂环境下蠕变效应对沥青混合料性能的影响  

The influence of creep effect on the performance of asphalt mixture in complex environment

作　　者：何忠明[1,2] 李雅倩 谢唐新 欧剑珺 杨菲玉 HE Zhongming;LI Yaqian;XIE Tangxin;OU Jianjun;YANG Feiyu(School of Traffic&Transportation Engineering,Changsha University of Science&Technology,Changsha 410114,China;National Engineering Research Centre for Highway Maintenance Technology,Changsha University of Science&Technology,Changsha 410114,China)

机构地区：[1]长沙理工大学交通运输工程学院,湖南长沙410114 [2]长沙理工大学公路养护技术国家工程研究中心,湖南长沙410114

出　　处：《交通科学与工程》2024年第4期1-10,20,共11页Journal of Transport Science and Engineering

基　　金：国家自然科学基金项目(51978084);湖南省教育厅科技重点项目(22A0204)。

摘　　要：为了探究沥青混合料在高、低温条件下的性能变化,以及各种环境因素对其的影响程度,基于Burgers模型和沥青混合料的蠕变效应,通过自主开发的环境模拟仪对沥青混合料进行了基本性能试验,并采用灰色关联度分析方法评估单一因素对沥青混合料高、低温性能的影响程度。同时,采用主成分分析方法进一步揭示了耦合因素对沥青混合料高、低温性能的影响规律。研究发现:单因素对添加了苯乙烯-丁二烯-苯乙烯聚合物(styrenebutadiene-styrene,SBS)的改性沥青混合料高、低温性能的影响程度从大到小的排序为高温、紫外线、降雨;相较于单一因素,耦合因素对SBS改性沥青混合料高、低温性能影响更为显著,其中,耦合因素作用中起首要作用的是紫外线。Burgers模型的拟合结果表明:黏弹性参数会随着环境作用循环天数和环境因素的增多而逐渐降低,进而导致沥青混合料高、低温性能逐渐衰减,究其原因是沥青混合料中的黏性和弹性组分发生了转换。Considering the influence of different environmental factors on the high temperature and low temperature performance of asphalt mixture,based on the Burgers model and the creep effect of asphalt mixture,the basic performance test of asphalt mixture after environmental simulation is carried out with the help of self-developed environmental simulator.The grey correlation analysis method is used to evaluate the influence of single factor on the high and low temperature performance,and the principal component analysis method is used to explore the influence of coupling factors on the high and low temperature performance of asphalt mixture.It is found that compared with single factor,coupling factors have more serious damage to the high and low temperature performance of SBS modified asphalt mixture.The degree of influence of individual factors is as follows:high temperature has the greatest impact,followed by ultraviolet light,and then rainfall.Ultraviolet light plays a major role when these factors are coupled.The influence degree of single factor is high temperature,ultraviolet light,rainfall,and ultraviolet light plays a major role in coupling factors.In addition,according to the fitting results of Burgers model,the viscoelastic parameters gradually decrease with the increase of the number of environmental action cycles and environmental factors,resulting in the gradual attenuation of high and low temperature performance of asphalt mixture.The reason is that the viscous and elastic components in asphalt mixture are converted.

关 键 词：沥青混合料 BURGERS模型 蠕变 高温性能 低温性能 

分 类 号：U416[交通运输工程—道路与铁道工程]