基于贯入度试验的浇注式沥青混合料蠕变特征研究  

Research on Creep Characteristics of Guss-Asphalt Mixes Based on Indentation Test

作　　者：郑彧[1] 钱振东[1] 罗桑[1] 王汇[1] 

机构地区：[1]东南大学智能运输系统研究中心,南京210096

出　　处：《石油沥青》2012年第4期23-26,共4页Petroleum Asphalt

基　　金：教育部博士点基金项目(20110092120062)

摘　　要：为获取浇注式沥青混合料的材料本构关系及高温永久变形规律,对其进行20℃、40℃、60℃三个温度以及0.7 MPa与1.0 MPa两个加载力条件下的贯入度试验,结果显示浇注式沥青混合料的变形量随温度的增加而变大,且高温蠕变过程未出现蠕变破坏阶段。而后,基于改进的Burgers模型,利用Qrigin软件对贯入度试验数据进行非线性拟合,得出了不同温度与加载条件下的浇注式沥青混合料蠕变参数,为浇注式沥青混凝土的永久变形预估提供了材料参数及理论依据。Indentation test was conducted in the 20℃, 40℃, 60℃ and 0. 7MPa 1.0MPa, in order to gain the intrinsic material constitutive and high temperature deformation of guss - asphalt. The results showed that the deformation of guss - asphalt became larger as temperature increase, and the creep would not happen during the time of guss - asphalt＇ s high temperature creep. Then using the Origin software to fit the indenta- tion curve based on improved Burgers model, guss - asphalt＇ s parameters in different load situation were got- ten which provided material parameters and theoretical basis for the permanent deformation.

关 键 词：浇注式沥青混合料 贯入度 蠕变 改进Burgers模型 

分 类 号：U414[交通运输工程—道路与铁道工程]