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材料导报  2022, Vol. 36 Issue (13): 21010221-7    https://doi.org/10.11896/cldb.21010221
  无机非金属及其复合材料 |
透水沥青混合料动态模量影响因素分析
周志刚*, 周扬, 刘智仁
长沙理工大学道路结构与材料交通行业重点实验室,长沙 410114
Analysis of Influencing Factors on Dynamic Modulus of Porous Asphalt
ZHOU Zhigang*, ZHOU Yang, LIU Zhiren
Key Laboratory of Road Structure and Materials, Transportation Industry, Changsha University of Science and Technology, Changsha 410114,China
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摘要 为了给透水沥青路面结构分析、设计和养护提供依据,便于其工程推广应用,利用简单性能试验仪(SPT)开展透水沥青混合料(PA)动态模量的三轴压缩试验,研究空隙率、围压、加载频率、温度等因素对动态模量和相位角的影响规律,并对各因素进行灰色关联度分析。研究结果表明:空隙率对动态模量和相位角的综合影响最大,围压对两者的影响相对较小,而加载频率、温度分别主要影响动态模量、相位角。透水沥青混合料动态模量具有明显的热流变特性、频率特性和应力依赖性。动态模量随空隙率增大或温度升高而减小,随围压或加载频率增大而增大。动态模量在低温时的频率特性和高温时的应力依赖性均较强。相位角反映出不同条件下,透水沥青混合料黏弹性特征变化规律不同。随着温度的逐渐升高,黏性特征逐渐明显,在高频(低频)下,当温度升至25 ℃(40 ℃)之后,黏性特征又逐渐减弱。围压的增大会增强透水沥青混合料的弹性特征,而空隙率的增大会使其黏性特征明显。低温时,随着加载频率的增大,透水沥青混合料的黏性滞后特征减弱,高温时则相反。
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周志刚
周扬
刘智仁
关键词:  透水沥青混合料  动态模量  相位角  三轴压缩试验  影响因素  灰色关联度    
Abstract: The triaxial compression test of dynamic modulus of porous asphalt (PA) was carried out by using simple performance tester (SPT) to study the influence of air voids, confining pressure, loading frequency and temperature on dynamic modulus and phase angle in order to provide the basis for the structural analysis, design and maintenance of porous asphalt pavement, so as to promote its engineering application. Meanwhile, the grey correlation analysis was performed concurrently. The results show that the air voids has the greatest influence on the dynamic modulus and phase angle, while the confining pressure has relatively slight influence on them, and that the loading frequency and temperature mainly affect the dynamic modulus and phase angle respectively. The dynamic modulus of porous asphalt has obvious thermal and rheological properties, frequency characteristics and stress dependence. The dynamic modulus decreases with increasing void fraction or temperature and increases with increasing surrounding pressure or loading frequency. The dynamic modulus has strong frequency characteristics at low temperatures and stress dependence at high temperatures. The phase angle reflects that the viscoelastic characteristics of porous asphalt change differently under different conditions. With the increase of temperature, the viscosity characteristics become more obvious. When the temperature rises to 25 ℃(40 ℃) respectively at high frequency (low frequency), the viscosity characteristics gradually weaken. The increase of confining pressure will enhance the elastic characteristics of porous asphalt, while the increase of air voids can make the viscosity characteristics obvious. At low temperature, the viscosity hysteresis characteristics of porous asphalt abates with the increase of loading frequency, but it is opposite at high temperature.
Key words:  porous asphalt    dynamic modulus    phase angle    triaxial compression test    influence factors    grey correlation degree
出版日期:  2022-07-10      发布日期:  2022-07-12
ZTFLH:  U414  
通讯作者:  * zhou_zgcs@sina.com   
作者简介:  周志刚,教授,博导,国务院特殊津贴获得者,交通部首批新世纪“十百千人才工程”第一层次人选。1983年至1991年就读于清华大学,获工程力学与建筑结构工程工学双学士学位、固体力学工学硕士学位,毕业后一直在长沙交通学院从事道路工程教学与科研工作;2003年6月毕业于中南大学获得道路与铁道工程专业工学博士学位,现任长沙理工大学道路结构与材料交通行业重点实验室主任。主要从事道路工程领域研究。获得国家科技进步二等奖1项(排名第二),国家专利20余项,在国内外期刊发表论文200余篇,出版学术专著、教材4部,参编国家标准、规范2部。
引用本文:    
周志刚, 周扬, 刘智仁. 透水沥青混合料动态模量影响因素分析[J]. 材料导报, 2022, 36(13): 21010221-7.
ZHOU Zhigang, ZHOU Yang, LIU Zhiren. Analysis of Influencing Factors on Dynamic Modulus of Porous Asphalt. Materials Reports, 2022, 36(13): 21010221-7.
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http://www.mater-rep.com/CN/10.11896/cldb.21010221  或          http://www.mater-rep.com/CN/Y2022/V36/I13/21010221
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