基于综合性能的ATB混合料组成设计方法研究

发布时间：2018-04-24 03:05

  本文选题：沥青混合料 + 组成设计方法　； 参考：《长沙理工大学》2014年硕士论文

【摘要】：目前,国内外对ATB混合料设计方法的研究甚少,现有的沥青混合料设计方法中并不能很好的平衡每个路用性能之间的关系,某个路用性能较好可能会导致相对应的路用性能较差,从ATB混合料综合性能出发,研究基于综合性能的ATB组成设计方法,对我国的重载交通高等级公路的施工和建设具有重大意义。在借鉴国内外研究的基础上,本文通过室内试验与数据分析,对ATB混合料路用性能的影响因素进行深入分析,并研究了基于综合性能的ATB混合料组成设计方法。理论分析了沥青路面病害现象,包括车辙、低温开裂、水损害与反射裂缝,研究了病害产生机理与影响因素。在理论分析的基础上,提出了ATB混合料应具备的综合技术特性。理论上对比分析沥青混合料路用性能的试验方法,在试验基础上,选取适合ATB混合料高温、低温与水稳性能的试验方法与评价指标,并提出混合料抗反射裂缝试验方法与评价指标。通过试验对比分析粗细集料比对ATB混合料综合性能的影响,基于粗细集料比与ATB混合料综合性能的关系,,综合平衡各个方面的路用性能,推荐粗细集料比在62/38-71/29时,ATB混合料满足全部技术要求。在试验的基础上,分析不同沥青、粉胶比与沥青膜厚度对ATB混合料综合性能的影响。设计ATB混合料时,建议通常情况下选用SBS改性沥青,粉胶比取1.0～1.2,沥青膜厚度取11-9μm；在高温性能要求较高的道路建议选用低标号基质沥青或者SBS改性沥青,粉胶比取1.2～1.4,沥青膜厚度取10-9μm；对寒区道路建议选用高标号基质沥青或者SBS改性沥青,粉胶比取0.8-1.0,沥青膜厚度取11-10gm。采用抗剪强度、弯拉应变与综合抗裂度确定最佳沥青用量,从原材料选择、级配设计、沥青用量的确定与路用性能验证四个方面出发,提出了基于综合性能的ATB混合料组成设计方法。
[Abstract]:At present, there is little research on ATB mixture design method at home and abroad. The existing asphalt mixture design method can not balance the relationship between each road performance. A better road performance may lead to poor road performance. Based on the comprehensive performance of ATB mixture, the design method of ATB composition based on comprehensive performance is studied. It is of great significance to the construction and construction of heavy-haul high-grade highway in China. On the basis of domestic and foreign research, this paper deeply analyzes the influencing factors of ATB mixture pavement performance through indoor test and data analysis, and studies the design method of ATB mixture composition based on comprehensive performance. The phenomena of asphalt pavement diseases, including rutting, low temperature cracking, water damage and reflection cracks, are analyzed theoretically, and the mechanism and influencing factors of the disease are studied. On the basis of theoretical analysis, the comprehensive technical characteristics of ATB mixture are put forward. The test methods of asphalt mixture road performance are compared and analyzed theoretically. On the basis of the test, the test methods and evaluation indexes suitable for high temperature, low temperature and water stability of ATB mixture are selected. At the same time, the test method and evaluation index of anti-reflection crack of mixture are put forward. The influence of the ratio of coarse aggregate to fine aggregate on the comprehensive performance of ATB mixture is compared and analyzed. Based on the relationship between the ratio of coarse and fine aggregate and the comprehensive performance of ATB mixture, the road performance of each aspect is comprehensively balanced. It is recommended that ATB mixture meet all technical requirements at 62 / 38-71 / 29. On the basis of experiments, the effects of different asphalt, binder ratio and asphalt film thickness on the comprehensive properties of ATB mixture are analyzed. In the design of ATB mixture, it is suggested that SBS modified asphalt should be selected, the ratio of powder to binder is 1.0 渭 m, the thickness of asphalt film is 11-9 渭 m, and the low grade base asphalt or SBS modified asphalt is recommended for the road with high temperature performance. The ratio of powder to binder is 1.2 ~ 1.4 and the thickness of asphalt film is 10 ~ (-9) 渭 m. It is suggested that high grade base asphalt or SBS modified asphalt should be used for cold road, the ratio of powder to binder is 0.8-1.0, and the thickness of asphalt film is 11-10 g 路m ~ (-1). The optimum asphalt content is determined by shear strength, flexural strain and comprehensive crack resistance, starting from four aspects: raw material selection, gradation design, asphalt dosage determination and road performance verification. The composition design method of ATB mixture based on comprehensive performance is put forward.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U414
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本文编号：1794840