基于外加剂技术的沥青混合料动、静态模量及相关性能研究

发布时间：2018-03-24 02:40

本文选题：沥青混合料　切入点：抗压回弹模量　出处：《长安大学》2014年硕士论文

【摘要】：沥青混合料的高、低温性能与其静态模量联系密切，目前出现了许多外加剂对沥青混合料的高温、低温性能进行改善，但在外加剂与沥青混合料模量相关关系方面还缺乏系统的研究。另外，沥青路面在实际工作中经受车辆荷载、气候、水文等条件的反复作用，而现行的静态设计方法并不能准确体现沥青混合料真实的受力状况，在力学模型以及材料参数方面都与实际状况有所差别，在一定程度上限制了路面结构设计的发展。而从目前来看，采用动态参数能对这一状况有所改善，所以路面结构设计向动态方法的发展将是合理的趋势，从这一方面来说对沥青混合料的动态模量进行系统的试验研究是很有必要和有意义的。本文首先对添加抗车辙剂、新型橡维联、PR.M三种不同外加剂的沥青混合料进行了不同温度区段的抗压回弹模量试验，分析了静态模量及回弹变形随温度的变化规律，以及三种外加剂在不同温度区段对静态模量的改善效果，以确定不同沥青混合料在不同温度地区的适用性。其次，对几种沥青混合料进行了不同试验温度、加载频率下的动态模量试验，，分析了温度、频率、外加剂等因素对动态模量及相位角的影响规律，并结合静态模量试验结果利用SPSS软件进行了不同试验温度、加载频率时的动、静态模量相关性回归分析，得到不同沥青混合料的动态模量回归公式，可根据静态模量近似计算不同试验条件下的动态模量。再次，对几种沥青混合料进行了路用性能试验，并结合动、静态模量的试验结果，验证沥青混合料路用性能与模量之间的相关性。最后，进行了不同温度下的单轴静载蠕变试验，分析几种外加剂对沥青混合料粘弹性以及蠕变劲度模量的影响。
[Abstract]:Asphalt mixture of high, low temperature performance and static modulus of close contact, there are many additives on the asphalt mixture at high temperature, low temperature performance is improved, but also the lack of systematic research in admixture with asphalt mixture modulus relationship. In addition, the asphalt pavement under vehicle load, in the actual work climate, repeated action the hydrological conditions, while the static design method can not accurately reflect the current and actual stress condition of asphalt mixture, the mechanical model and the material parameters and the actual situation is different, to a certain extent, restrict the development of pavement structure design. From the current point of view, the dynamic parameters can be improved on this a condition, so the pavement structure design to the development of the dynamic method is reasonable, systematic test of the dynamic modulus of asphalt mixture in this respect It is necessary and meaningful to study the study.
Firstly, adding anti rutting agent, new oak dimension, the compressive modulus test of different temperature zones PR.M three different admixtures of asphalt mixture, the static modulus and rebound deformation with temperature variation were analyzed, and three kinds of additives in different temperature section of the static modulus effect, to determine the application in the different temperature regions of different asphalt mixture.
Secondly, on several kinds of asphalt mixture under different test temperature, loading frequency under dynamic modulus test, analysis of temperature, frequency, influence of additives and other factors on the dynamic modulus and phase angle, and combining the static modulus test results by using SPSS software for different test temperature, loading frequency of dynamic and static modulus correlation and regression analysis, the dynamic modulus of asphalt mixture can be obtained according to the regression equation, the static modulus of approximate calculation of dynamic modulus under different test conditions.
Thirdly, road performance tests of several asphalt mixtures were carried out, and the correlation between road performance and modulus of asphalt mixture was verified by combining test results of dynamic and static modulus.
Finally, the static uniaxial creep test under different temperature, analysis of several additives on asphalt mixture viscoelastic and creep stiffness modulus.

【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U414

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