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高掺量胶粉改性沥青混合料动态粘弹性分析

第37卷第10期 硅 酸 盐 通 报 Vol .37 No .10 2018年10月 BULLETIN OF THE CHINESE CERAMIC SOCIETY October ,2018

高掺量胶粉改性沥青混合料动态粘弹性分析

王新强1,2,王国清1,王庆凯3,4,高占华3,4,李浩天3,4

(1.河北工业大学土木与交通学院,天津 300401;2.河北石青高速公路有限公司,石家庄 050051;

3.河北省道路结构与材料工程技术研究中心,石家庄 050091;

4.河北省交通规划设计院,石家庄 050091)

摘要:为了研究高掺量胶粉改性沥青混合料的动态粘弹性特性,选择3种级配和2种掺量的胶粉改性沥青混合料进行AMPT 试验,测定混合料的动态模量和相位角,分析级配、胶结料、加载频率和温度对胶粉改性沥青混合料动态响应参数动态模量和相位角的影响。试验表明,级配类型和胶结料分别对胶粉改性沥青混合料的粘弹性具有明显的影响;混合料的动态模量随着加载频率的降低而逐渐减小;随着温度的升高,动态模量逐渐降低。当加载频率一定时,相位角随着试验温度的增加呈现先增大后减小的趋势;当加载频率增加时,相位角在低温环境(5℃)时逐渐衰减,相位角在高温环境(35℃、50℃)时逐渐增大,在中间温度(20℃)时呈现先上升后下降的趋势。

关键词:高掺量;胶粉改性沥青;动态粘弹性;动态模量;相位角

中图分类号:U 414 文献标识码:A 文章编号:1001-1625(2018)10-3303-07

DynamicViscoelasticAnalysisofModifiedAsphaltMixtureswithLargeDosageofRubberPowder

WANGXin-qiang1,2,WANGGuo-qing1,WANGQing-kai3,4,GAOZhan-hua3,4,LIHao-tian3,4

(1.School of Civil and Transportation Engineering ,Hebei University of Technology ,Tianjin 300401,China ;2.HebeiShiqing Expressway Company Limited ,Shijiazhuang 050051,China ;3.Hebei Province road structure and Material Technology Research Center ,Shijiazhuang 050091,China ;4.Hebei Provincial Communcations Planning and Design Institue ,Shijiazhuang 050091,China )

基金项目:河北省科技计划项目(16211247)

作者简介:王新强(1977-),男,博士生,高级工程师.主要从事路面材料科学与路面结构体系研究.Abstract:In order to study the dynamic viscoelastic properties of high content modified asphalt mixture ,the AMPT test was carried out by selecting three gradation and two dosage of rubber powder modified asphalt mixture ,the dynamic modulus and phase angle of the mixture were measured ,the influence of gradation ,cementing material ,loading frequency and temperature on the dynamic modulus and phase angle of the modified asphalt mixture is analyzed .Test results show that the gradation type and cementing material have obvious influence on the viscoelasticity of the modified asphalt mixture .The dynamic modulus of the mixture decreases with the decrease of loading frequency .As the temperature increases ,the dynamic modulus decreases gradually .When the loading frequency is certain ,the phase angle increases first and then decreases with the increase of test temperature .When the loading frequency increases ,the phase angle at low temperature (5℃)gradually decay ,the phase angle in the environment of high temperature (35℃,50℃)increased gradually the tendency to rise first and then fallin in the middle temperature (20℃).Keywords:large dosage ;rubber powder modified asphalt ;dynamic viscoelasticity ;dynamic modulus ;phase angle

1 引 言

胶粉改性沥青混合料是一种由胶粉改性沥青、集料和空隙组成的复合材料,是典型的粘弹性材料。沥青及混合料的动态粘弹特性是指在交变荷载(应力或应变)作用下,沥青与沥青混合料的粘弹性能随着频率的

变化情况[1]。通常使用的橡胶沥青的胶粉掺量为20%,美国各州胶粉掺量要求在17%~20%之间,南非废

胎胶粉剂量在18%~24%之间,澳大利亚废胎胶粉剂量在25%左右[2]。胶粉掺量达到30%、40%的橡胶沥

万方数据

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