摘要
为研究岩沥青-胶粉复合改性沥青混合料的黏弹特性,采用沥青混合料性能试验机(asphalt mixture performance testing,AMPT)对不同岩沥青用量的复合改性沥青混合料在不同试验条件下的单轴动态压缩模量和相位角进行了测试,构建了动态模量主曲线,建立了动态模量预测模型。结果表明:当试验温度增大或加载频率降低时,岩沥青-胶粉复合改性沥青混合料的动态模量逐渐降低;随着岩沥青掺量的增加,AC-20复合改性沥青混合料抗车辙性能提高,疲劳性能降低;测定的复合改性沥青混合料20℃动态模量接近于14000 MPa,符合高模量沥青混合料的技术要求;经测试,所构建动态模量预测模型的预测精度可达83%。
In order to examine the viscoelastic properties of rock asphalt-rubber composite modified asphalt mixture,the asphalt mix⁃ture performance testing machine(AMPT)was used to measure the phase angle and uniaxial dynamic compression modulus of the composite modified asphalt mixture’s various material compositions under various test conditions.The dynamic predictive modulus and primary dynamic modulus curve of the rock asphalt-rubber composite-modified asphalt mixture were established using the timetemperature equivalency approach.The results indicate that the dynamic modulus of the rock asphalt-rubber powder composite modi⁃fied asphalt mixture gradually decreases with the increased test temperature or loading frequency.The rutting resistance of the AC-20 composite modified asphalt mixture improves as the rock asphalt doping level increased,while the fatigue performance decreases.The dynamic modulus of the rock asphalt-rubber composite modified asphalt mixture is determined to be close to 14000 MPa at 20℃.The dynamic modulus prediction model created herein can reach 83%prediction accuracy,and the findings fulfill the high modulus technical criteria for asphalt mixtures.
作者
苏纪壮
刘玉梅
阚涛
吴思
王业飞
高国华
SU Jizhuang;LIU Yumei;KAN Tao;WU Si;WANG Yefei;GAO Guohua(Key Laboratory of Highway Technology and Safety Assessment of Shandong Province,Jinan 250002,China;The Research Center of Bulk Solid Waste Materials Recycled Using in Transportation Field,Jinan 250002,China;School of Transportation Engineering,Shandong Jianzhu University,Jinan 250101,China;Shandong Hi-Speed Engineering Test Co.,Ltd.,Jinan 250002,China)
出处
《中国科技论文》
CAS
2024年第4期475-482,共8页
China Sciencepaper
基金
山东省重点研发计划项目(2020CXGC011405)。
关键词
道路工程
复合改性沥青混合料
胶粉改性沥青
岩沥青
黏弹特性
road engineering
composite modified asphalt mixture
rubber modified asphalt
rock asphalt
viscoelastic properties
