纤维碎石封层应用技术研究

发布时间：2019-03-16 12:42

【摘要】：纤维碎石封层技术是运用专门的机械设备,将沥青结合料和玻璃纤维一同撒布,然后再铺上碎石,最后经过压路机碾压成型。纤维碎石封层因为其具有特别好的防裂、抗滑、抗磨耗等优异性能,同时施工便捷、成本低廉,在未来的发展中有较好的应用前景。纤维碎石封层技术在现在的沥青路面施工技术规范里,并没有规定具体的施工技术方法,只是在纤维碎石封层的材料性能、配合比的设计、施工工艺和质量管理等方面进行了一部分的技术规定。纤维碎石封层施工时选取材料范围较广,配合比同时也是基于传统的经验法,施工工艺和质量管理只是对相关类似规范的复制,因此,对纤维碎石封层进行应用技术研究具有很重要的意义。为了更好的研究纤维碎石封层技术,通过不同的乳化沥青用量和不同的纤维用量进行纤维碎石封层构造深度实验、湿轮磨耗实验、负荷轮碾压实验、车辙变形实验以及力学性能实验,从而得出了各个指标的变化范围及趋势。经过对实验的结果分析,得出了以下结论：在纤维碎石封层配合比的实验中,纤维碎石封层的磨耗值、粘附砂值与乳化沥青用量和纤维用量的关系图并不是简单地递增递减的关系,而是出现了最佳用量数值。纤维碎石封层的抗变形能力和抗磨耗能力最佳时的乳化沥青的用量为1.7kg/m2,黏附砂值最小的乳化沥青用量为1.9kg/m2,纤维用量为75g/m2。纤维的用量一定时,随着乳化沥青用量的增加,纤维碎石封层的抗拉性也随之增强；反之,乳化沥青的用量一定时,随着纤维用量的增加,纤维碎石封层的抗磨耗性、抗滑性分别会有不同程度的增加,但是抗剪切性会下降,分析由试验室得出的数据结果表明纤维碎石封层具有较好的路面抗滑性能。
[Abstract]:Fiber macadam sealing technology is the use of special mechanical equipment, asphalt binder and glass fiber spread together, then spread the gravel, and finally through the roller rolling molding. Because of its excellent performance of anti-crack, anti-skid, anti-wear, convenient construction and low cost, the fiber-crushed stone sealing layer has a good application prospect in the future development. Fiber crushed stone seal layer technology in the present asphalt pavement construction technical specification, does not specify the concrete construction technology method, only in the fiber crushed stone seal layer material performance, the mix ratio design, Some technical regulations have been made in the aspects of construction technology and quality management. In the construction of fiber crushed stone seal layer, the selection of materials is wide, the mix ratio is also based on the traditional empirical method, the construction technology and quality management are only the replication of the relevant similar norms, therefore, the mixture ratio is also based on the traditional experience method. It is of great significance to study the application technology of fiber crushed stone sealing layer. In order to better study the sealing technology of fiber crushed stone, the structure depth experiment, wet wheel wear experiment and load wheel rolling experiment of fiber crushed stone seal layer were carried out by different amount of emulsified asphalt and different fiber dosage. Rut deformation experiment and mechanical properties experiment, so as to obtain the range and trend of each index. Through the analysis of the experimental results, the following conclusions are drawn: in the experiment of the mixture ratio of the fiber crushed stone seal layer, the wear value of the fiber crushed stone seal layer, The relationship between adhesion sand value and emulsified asphalt content and fiber content is not simply increasing and decreasing, but the optimum dosage value appears. The content of emulsified asphalt is 1.7 kg / m ~ 2, the content of emulsified asphalt with the lowest adhesion sand value is 1.9 kg / m ~ 2, and the content of fiber is 75 g / m ~ 2 when the anti-deformation and wear resistance of fiber-crushed stone seal layer is the best. With the increase of the content of emulsified asphalt, the tensile resistance of the fiber-crushed stone sealing layer is also enhanced when the amount of fiber is constant. On the contrary, when the dosage of emulsified asphalt is constant, the anti-wear and skid resistance of fiber-crushed stone sealing layer will increase to some extent with the increase of fiber content, but the shear resistance will decrease. The analysis of the data obtained from the laboratory shows that the fiber-crushed stone sealing layer has a good anti-skid performance.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.2

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