摘要
为了准确评价乳化沥青流变特性对冷再生混合料路用性能的影响规律,从而为乳化沥青冷再生混合料性能指标的建立提供参考。采用界面流变和动态剪切流变的手段,以乳化沥青的界面扩张模量、黏性/弹性模量、相位角、黏性和弹性的转变点等流变参数为主要特征参数,考察其随频率和温度的变化情况以及对冷再生混合料性能的影响规律,并结合乳化沥青各组分的作用机理和流变模型分析,采用描述线性黏弹性流体的理想模型(即Maxwell流体模型)进行拟合计算,建立了多项流变参数与路用性能指标的构效关系,并进行乳化沥青冷再生混合料的性能评价。试验结果表明:所考察的流变性能参数与乳化沥青及冷再生混合料的性能有很好的相关性;界面扩张模量与乳化沥青的黏度和储存稳定性呈正相关性,其值越高,乳化沥青黏度越大,储存稳定性更佳;乳化沥青黏性-弹性的转变温度以及模量与冷再生混合料的强度和水稳定性呈正相关性,其值越大,乳化沥青冷再生混合料的强度越高,水稳定性更好;与经典的Maxwell流体模型相比,乳化沥青的cole-cole图(弹性模量对黏性模量作图)和G′/G″-ω图(弹性模量G′和黏性模量G″对频率ω作图)均与理论模型偏离,属于具有非单一结构松弛时间的非线性黏弹性流体。研究结果可为乳化沥青冷再生混合料的理论研究及性能指标的建立提供参考。
Interfacial rheology and dynamic shear rheology were employed to investigate the effect of rheological properties of emulsified asphalt on the performance index of cold recycled mixture with emulsified asphalt,as well as to provide guidance for establishing the performance index.The main characteristic parameters were set up,including interfacial dilational modulus,viscous/elastic modulus,phase angle,and viscous to elastic transition.The variations of all the parameters as functions of temperature and frequency,and their effects on the properties of cold recycled mixture were studied.The ideal Maxwell model was used to calculate the real model of the fluid.Based on the interaction mechanism and rheological model,the relationship between therheological parameters and the pavement properties of cold recycled mixture with emulsified asphalt was established,and it can be applied for the property evaluation of the cold recycled mixture.The results show that the rheological parameters related to the pavement properties of emulsified asphalt cold recycled mixture.The dilational modulus as well as viscosity has a positive correlation with the storage stability of the asphalt emulsion.A large dilational modulus and high viscosity result in favorable storage stability for the asphalt emulsion.The rheological parameters of the transition temperature from the viscous to elastic state and the modulus have a positive correlation with the strength and moisture stability of the cold recycled mixture.A high transition temperature and modulus of the emulsified asphalt result in high values of strength and moisture stability of the cold recycled mixture.Furthermore,the diagrams of cole-cole（elastic modulus versus viscous modulus）and G′/G″-ω（elastic modulus G′and viscous modulus G″versus frequencyω）deviate from the classical Maxwell fluid model,indicating a nonlinear viscoelastic fluid with a non-structural relaxation time.These results could provide a database for theoretical research and help to establish a perfo
作者
高新文
庞瑾瑜
GAO Xin-wen;PANG Jin-yu(School of Traffic and Transportation Engineering,Changsha University of Science and Technology,Changsha 410004,Hunan,China;Transport Department of Shanxi Province,Taiyuan 030001,Shanxi,China;Shanxi Transportation Research Institute,Taiyuan 030006,Shanxi,China)
出处
《长安大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第4期21-28,共8页
Journal of Chang’an University(Natural Science Edition)
基金
山西省应用基础研究计划项目(2015021054)
关键词
道路工程
乳化沥青冷再生
流变性能
界面流变
动态剪切流变
road engineering
emulsified asphalt cold recycled mixture
rheological property
interfacial rheology
dynamic shear rheology
