矿料组成对沥青路面宏观纹理及抗滑性能的影响研究
发布时间：2018-10-24 08:25
【摘要】：随着沥青路面的大量建成使用,路面抗滑性能不足导致的安全问题日益突出。沥青路面表面的宏观纹理构造与沥青路面抗滑性能紧密相关。同时,不同的矿料组成建成的路面表面有不同的宏观纹理构造。因此,引入宏观纹理作为桥梁,可以更清楚地分析矿料组成与抗滑性能的关系,为沥青路面的抗滑设计方法的优化打下很好的基础。为研究不同矿料组成情况沥青混合料路面的宏观纹理构造情况和抗滑性能的关系,本文设计了4种类型共9组级配的沥青混合料。通过马歇尔试验确定了不同级配的最佳沥青用量。同时为更好的模拟实际路面,使用小型手扶式振动压路机成型了9块路面试件板。采用手持式3D高精度激光扫描仪,获取路面表面三维宏观构造图像;利用Geomagic Studio 12将沥青路面三维扫描图像转化成为高精度数字化模型;使用Matlab软件计算得到6种表征沥青路面宏观纹理三维特征的指标。为评价沥青路面表面的抗滑性能,使用摆式仪和铺砂法、DFT测试沥青路面试件。根据计算得到的6种三维宏观纹理特征,分析它们和矿料组成描述指标以及沥青路面抗滑性能间的相关性。最终筛选得到了11个敏感性高的描述指标。最后,分析了矿料组成情况对沥青路面抗滑性能的影响。
[Abstract]:With the extensive construction and use of asphalt pavement, the safety problems caused by insufficient anti-skid performance of asphalt pavement are becoming more and more prominent. The macroscopic texture structure of asphalt pavement surface is closely related to the anti-skid performance of asphalt pavement. At the same time, the surface of pavement made up of different mineral materials has different macroscopic texture structure. Therefore, the introduction of macro texture as a bridge can more clearly analyze the relationship between the composition of mineral aggregate and the anti-slide performance, and lay a good foundation for the optimization of anti-slide design method of asphalt pavement. In order to study the relationship between macroscopic texture and anti-skid performance of asphalt mixture pavement with different mineral composition, four kinds of asphalt mixtures with 9 groups of gradation were designed in this paper. The optimum asphalt content of different gradation was determined by Marshall test. At the same time, in order to better simulate the actual road surface, nine pavement test plates were formed by using a small walking vibratory roller. The 3D macro structure image of pavement surface was obtained by hand held 3D high precision laser scanner, and the 3D scanning image of asphalt pavement was transformed into high precision digital model by Geomagic Studio 12. Matlab software was used to calculate the six indexes representing the macroscopic texture of asphalt pavement. In order to evaluate the skid resistance of asphalt pavement surface, DFT was used to test the asphalt pavement specimen with pendulum and sand spreading method. According to the six kinds of 3D macroscopic texture features calculated, the correlation between them and the description index of mineral composition and the skid resistance of asphalt pavement is analyzed. Finally, 11 indicators with high sensitivity were obtained. Finally, the influence of mineral composition on the skid resistance of asphalt pavement is analyzed.
【学位授予单位】：北京工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.217
，
本文编号：2290857
[Abstract]:With the extensive construction and use of asphalt pavement, the safety problems caused by insufficient anti-skid performance of asphalt pavement are becoming more and more prominent. The macroscopic texture structure of asphalt pavement surface is closely related to the anti-skid performance of asphalt pavement. At the same time, the surface of pavement made up of different mineral materials has different macroscopic texture structure. Therefore, the introduction of macro texture as a bridge can more clearly analyze the relationship between the composition of mineral aggregate and the anti-slide performance, and lay a good foundation for the optimization of anti-slide design method of asphalt pavement. In order to study the relationship between macroscopic texture and anti-skid performance of asphalt mixture pavement with different mineral composition, four kinds of asphalt mixtures with 9 groups of gradation were designed in this paper. The optimum asphalt content of different gradation was determined by Marshall test. At the same time, in order to better simulate the actual road surface, nine pavement test plates were formed by using a small walking vibratory roller. The 3D macro structure image of pavement surface was obtained by hand held 3D high precision laser scanner, and the 3D scanning image of asphalt pavement was transformed into high precision digital model by Geomagic Studio 12. Matlab software was used to calculate the six indexes representing the macroscopic texture of asphalt pavement. In order to evaluate the skid resistance of asphalt pavement surface, DFT was used to test the asphalt pavement specimen with pendulum and sand spreading method. According to the six kinds of 3D macroscopic texture features calculated, the correlation between them and the description index of mineral composition and the skid resistance of asphalt pavement is analyzed. Finally, 11 indicators with high sensitivity were obtained. Finally, the influence of mineral composition on the skid resistance of asphalt pavement is analyzed.
【学位授予单位】：北京工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.217
，
本文编号：2290857
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