大粒径透水性沥青混合料组成设计及适用性研究
发布时间：2018-09-14 19:01
【摘要】：近年来,由于受到“强基薄面”理论的影响,半刚性基层仍是我国高速公路路面结构类型中基层设计的首选方案。但当前交通荷载特性发展呈现重载化、快速化、渠道化的新趋势,半刚性基层路面结构类型自身缺陷造成沥青路面容易发生反射裂缝及水损害病害的问题日益突出。大粒径透水性沥青混合料(LSPM)作为沥青路面柔性基层,可以有效地缓解沥青路面反射裂缝普遍存在以及水损害过早发生的现状,是沥青路面柔性基层设计的一种新途径、新思路。本文参考国内外有关大粒径透水性沥青混合料的研究成果与实践经验,对大粒径透水性沥青混合料的组成设计及适用性进行了研究。首先对MAC改性沥青作为大粒径透水性沥青混合料胶结料的适用性进行了研究,测试了MAC改性沥青的静态流动性能、感温性能,及其混合料的析漏性能,并经过试验推荐了MAC改性沥青制备试样时的浇模温度;介绍了大粒径透水性沥青混合料的强度形成机理及级配设计方法,并对大马歇尔成型方法、体积参数测定及最佳沥青用量确定方法针对性地开展了研究;采用马歇尔试验级配设计方法,确定了LSPM-30的配合比,并对其高温稳定性、水稳定性、渗透性能及疲劳性能等路用性能进行对比分析;与AC-25密级配沥青混合料的经济性进行对比,分析评价了大粒径透水性沥青混合料的社会经济效益。实验室试验数据分析表明,大粒径透水性沥青混合料具有良好的高温稳定性、水稳定性、渗透性能及疲劳性能,可以有效缓解沥青路面反射裂缝普遍存在以及水损害过早发生的现状,与传统的半刚性基层材料相比,具有明显的技术优越性。
[Abstract]:In recent years, due to the influence of the theory of "strong foundation and thin surface", semi-rigid base is still the first choice in the design of highway pavement structure in China. However, the development of traffic load characteristics shows a new trend of heavy load, rapid development and channelization. The problem that asphalt pavement is prone to reflective cracks and water damage due to the defects of semi-rigid pavement structure type is becoming more and more prominent. As a flexible base of asphalt pavement, (LSPM) with large particle size permeable asphalt mixture can effectively alleviate the widespread existence of reflective cracks and the premature occurrence of water damage on asphalt pavement. It is a new way and a new way to design flexible base course of asphalt pavement. In this paper, the composition design and applicability of the large diameter permeable asphalt mixture are studied by referring to the research results and practical experience of the large diameter permeable asphalt mixture at home and abroad. Firstly, the applicability of MAC modified asphalt as the binder of large particle permeability asphalt mixture is studied, and the static fluidity, temperature sensing performance and leakage performance of MAC modified asphalt are tested. The pouring mold temperature of MAC modified asphalt is recommended through experiments, the strength forming mechanism and gradation design method of large particle permeability asphalt mixture are introduced, and the large Marshall forming method is introduced. The determination of volume parameters and the determination of the optimum asphalt content were studied, and the proportion of LSPM-30 was determined by Marshall test gradation design method, and the high temperature stability and water stability of LSPM-30 were determined. The road performance such as permeability and fatigue performance were compared and analyzed, and compared with the economy of AC-25 dense gradation asphalt mixture, the social and economic benefits of the large diameter permeable asphalt mixture were analyzed and evaluated. The analysis of laboratory test data shows that the large particle permeability asphalt mixture has good high temperature stability, water stability, permeability and fatigue performance. It can effectively alleviate the widespread existence of reflective cracks in asphalt pavement and the premature occurrence of water damage. Compared with the traditional semi-rigid base material, it has obvious technical advantages.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414
本文编号：2243601
[Abstract]:In recent years, due to the influence of the theory of "strong foundation and thin surface", semi-rigid base is still the first choice in the design of highway pavement structure in China. However, the development of traffic load characteristics shows a new trend of heavy load, rapid development and channelization. The problem that asphalt pavement is prone to reflective cracks and water damage due to the defects of semi-rigid pavement structure type is becoming more and more prominent. As a flexible base of asphalt pavement, (LSPM) with large particle size permeable asphalt mixture can effectively alleviate the widespread existence of reflective cracks and the premature occurrence of water damage on asphalt pavement. It is a new way and a new way to design flexible base course of asphalt pavement. In this paper, the composition design and applicability of the large diameter permeable asphalt mixture are studied by referring to the research results and practical experience of the large diameter permeable asphalt mixture at home and abroad. Firstly, the applicability of MAC modified asphalt as the binder of large particle permeability asphalt mixture is studied, and the static fluidity, temperature sensing performance and leakage performance of MAC modified asphalt are tested. The pouring mold temperature of MAC modified asphalt is recommended through experiments, the strength forming mechanism and gradation design method of large particle permeability asphalt mixture are introduced, and the large Marshall forming method is introduced. The determination of volume parameters and the determination of the optimum asphalt content were studied, and the proportion of LSPM-30 was determined by Marshall test gradation design method, and the high temperature stability and water stability of LSPM-30 were determined. The road performance such as permeability and fatigue performance were compared and analyzed, and compared with the economy of AC-25 dense gradation asphalt mixture, the social and economic benefits of the large diameter permeable asphalt mixture were analyzed and evaluated. The analysis of laboratory test data shows that the large particle permeability asphalt mixture has good high temperature stability, water stability, permeability and fatigue performance. It can effectively alleviate the widespread existence of reflective cracks in asphalt pavement and the premature occurrence of water damage. Compared with the traditional semi-rigid base material, it has obvious technical advantages.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414
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