沥青混合料动态模量的研究
发布时间：2018-12-25 14:49
【摘要】：改革开放以来我国的经济发展迅猛,与此同时我国的公路需求也在不断增大,因而我国不断完善公路系统并修建越来越多的公路投入运营。我国沥青路面的设计方法也相应的随着国民经济以及公路运输系统的发展而不断地完善,各有关部门、高等院校等都对改进沥青路面设计方法与设计指标加大了重视力度。动态条件作用下的沥青混合料,其力学性质与在静态作用条件下的力学性质相比具有比较大的差别,而路面实际的受力状态可以通过动态模量来反映出来,因而研究沥青混合料的动态模量来研究沥青路面真实的受力状态是具有重要的意义的。本文是在大量实验的基础上对动态模量进行尽量全面地研究的。首先是制备动态模量试件,这可以通过旋转压实仪等实验设备实现。为了增加试验的准确性以及影响因素的多样性,本文选择了12种沥青混合料包括三种沥青种类、四种混合料级配类型进行试验试件的制备。对得到的试验试件利用基本性能试验仪在六个频率5个温度下进行动态模量的试验。动态模量试验之后,我们通过数据处理分析得到各因素与沥青混合料动态模量相互关联的关系以及各因素对其影响的趋势和规律。同时,基于时—温等效原理建立沥青混合料的主曲线,又对研究得到规律进行了进一步印证。最后对动态模量预估模型进行研究,得到适宜本文各沥青混合料动态模量的预估模型以及各因素对修正预估模型的作用。本文对深入研究沥青混合料的动态模量影响因素和预估模型具有较大的参考作用,同时会产生一定的应用价值与经济价值。
[Abstract]:Since the reform and opening up, the economic development of our country is swift and violent, at the same time our country's highway demand is also increasing, so our country unceasingly consummates the highway system and builds more and more highways to put into operation. With the development of national economy and highway transportation system, the design method of asphalt pavement in our country has been improved continuously. The departments concerned and colleges and universities have paid more attention to improving the design method and design index of asphalt pavement. The mechanical properties of asphalt mixture under dynamic condition are quite different from those under static condition, and the actual stress state of pavement can be reflected by dynamic modulus. Therefore, it is of great significance to study the dynamic modulus of asphalt mixture to study the true stress state of asphalt pavement. On the basis of a large number of experiments, the dynamic modulus is studied as comprehensively as possible in this paper. First, the dynamic modulus specimen is prepared, which can be achieved by rotating compaction apparatus and other experimental equipment. In order to increase the accuracy of the test and the diversity of influencing factors, 12 kinds of asphalt mixture including three kinds of asphalt and four types of mixture gradation were selected to prepare the test samples. The dynamic modulus of the samples was tested at six frequencies and five temperatures by using the basic performance tester. After the dynamic modulus test, we get the relationship between each factor and the dynamic modulus of asphalt mixture through data processing analysis, as well as the trend and law of the influence of each factor on the dynamic modulus of asphalt mixture. At the same time, the main curve of asphalt mixture is established based on the principle of time-temperature equivalence. Finally, the dynamic modulus prediction model is studied, and the prediction model suitable for each asphalt mixture in this paper and the effect of various factors on the modified prediction model are obtained. This paper is of great reference to the further study of the dynamic modulus of asphalt mixture and the prediction model, and will produce certain application value and economic value at the same time.
【学位授予单位】：山东建筑大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U414
[Abstract]:Since the reform and opening up, the economic development of our country is swift and violent, at the same time our country's highway demand is also increasing, so our country unceasingly consummates the highway system and builds more and more highways to put into operation. With the development of national economy and highway transportation system, the design method of asphalt pavement in our country has been improved continuously. The departments concerned and colleges and universities have paid more attention to improving the design method and design index of asphalt pavement. The mechanical properties of asphalt mixture under dynamic condition are quite different from those under static condition, and the actual stress state of pavement can be reflected by dynamic modulus. Therefore, it is of great significance to study the dynamic modulus of asphalt mixture to study the true stress state of asphalt pavement. On the basis of a large number of experiments, the dynamic modulus is studied as comprehensively as possible in this paper. First, the dynamic modulus specimen is prepared, which can be achieved by rotating compaction apparatus and other experimental equipment. In order to increase the accuracy of the test and the diversity of influencing factors, 12 kinds of asphalt mixture including three kinds of asphalt and four types of mixture gradation were selected to prepare the test samples. The dynamic modulus of the samples was tested at six frequencies and five temperatures by using the basic performance tester. After the dynamic modulus test, we get the relationship between each factor and the dynamic modulus of asphalt mixture through data processing analysis, as well as the trend and law of the influence of each factor on the dynamic modulus of asphalt mixture. At the same time, the main curve of asphalt mixture is established based on the principle of time-temperature equivalence. Finally, the dynamic modulus prediction model is studied, and the prediction model suitable for each asphalt mixture in this paper and the effect of various factors on the modified prediction model are obtained. This paper is of great reference to the further study of the dynamic modulus of asphalt mixture and the prediction model, and will produce certain application value and economic value at the same time.
【学位授予单位】：山东建筑大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U414
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