沥青混合料单轴蠕变特性分析  

ANALYSIS OF UNIAXIAL CREEP CHARACTERISTICS OF ASPHALT MIXES

作　　者：陆学元 彭勇[2] 王重阳 陈远播 魏星 LU Xueyuan;PENG Yong;WANG Chongyang;CHEN Yuanbo;WEI Xing(Anhui Transportation Holding Group Co.,Ltd.,Hefei 230088,China;Institute of Transportation Engineering,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]安徽省交通控股集团有限公司,合肥230088 [2]浙江大学交通工程研究所,杭州310058

出　　处：《低温建筑技术》2024年第3期56-60,共5页Low Temperature Architecture Technology

摘　　要：为分析沥青混合料单轴蠕变特性,评价沥青混合料抗变形能力,以5种沥青混合料和2个试验温度为例,进行不同类型混合料在不同温度下的单轴蠕变试验。试验结果表明,沥青混合料单轴蠕变特性会受沥青混合料类型和温度影响。不同集料级配,或相似集料级配但不同沥青胶结料的沥青混合料,其单轴蠕变特性不同,即其抗(永久)变形能力不同。随温度升高,沥青混合料瞬时变形弹性模量、粘滞阻力、抗黏弹性变形模量等显著降低,其抗(永久)变形能力也降低。Uniaxial creep tests are conducted on five asphalt mixes at two temperatures to analyze the uniaxial creep properties of asphalt mixes and to study their deformation resistance.The results show that the uniaxial creep proper⁃ties of asphalt mixes are affected by asphalt mix type and temperatures.Asphalt mixes with different aggregate grada⁃tions,and similar aggregate gradations but different asphalt binders have different uniaxial creep properties,i.e.,re⁃sistance to permanent deformation.The instantaneous elastic modulus,viscosity resistance,and anti-viscoelastic de⁃formation modulus of an asphalt mix decreases significantly with increasing temperature,and its resistance to perma⁃nent deformation capacity decreases.

关 键 词：路面工程 沥青混合料 蠕变特性 抗变形 单轴蠕变试验 

分 类 号：TU535[建筑科学—建筑技术科学]