宽温域改性沥青高低温性能及其混合料力学性能研究

发布时间：2018-01-11 15:38

本文关键词：宽温域改性沥青高低温性能及其混合料力学性能研究　出处：《北京科技大学》2015年博士论文　论文类型：学位论文

【摘要】：针对当前大多数沥青混合料不能很好解决我国沥青路面低温抗开裂、高温抗车辙之间矛盾,本论文开展了基于高低温性能均衡的宽温域改性沥青及混合料专项研究以期有效解决沥青路面高低温性能矛盾问题。本论文研究内容包括： 1、基于高低温性能均衡的宽温域改性沥青配方设计及机理性能分析。根据不同改性剂在沥青改性中的作用,论文进行不同材料组成、不同配比的改性沥青配方设计及性能检验并分析其高低温性能。然后综合试验结果提出高低温性能均衡的宽温域改性沥青配方,并对其进行机理及性能分析。 2、宽温域改性沥青高低温性能的新型试验方法及评价指标设计。针对现有试验方法及评价指标体系不能准确有效的评价改性沥青的高低温性能,本论文提出并阐述了高温流淌试验和低温拉伸试验及对应的指标体系来评价宽温域改性沥青的高低温性能,并对宽温域改性沥青进行了低温拉伸本构关系构建、曲线拟合等研究。 3、宽温域改性沥青施工性能研究。研究对宽温域改性沥青的施工黏度-温度、高温存储老化等施工性能进行探索后提出了相应合理的施工建议。 4、基于高低温性能均衡的宽温域改性沥青混合料的研究。研究在阐述了基于矿料最紧密状态的级配设计方法并完整提出该方法下油石比确定流程及一种改进的测定混合料试件毛体积密度的方法-刷蜡法后对宽温域改性沥青混合料的高低温性能、水稳定性能等路用性能进行了分析。 5、宽温域改性沥青混合料力学性能研究。论文在对宽温域改性沥青混合料的单轴压缩及间接拉伸动态模量进行研究后以单轴静载压缩蠕变试验对其黏弹性能进行了分析。 6、铺筑实体工程验证高低温性能均衡的宽温域改性沥青及混合料技术。
[Abstract]:At present, most asphalt mixtures can not solve the contradiction between low temperature crack resistance and high temperature rutting resistance of asphalt pavement in China. In this paper, the special research on wide temperature modified asphalt and its mixture based on high and low temperature performance equilibrium is carried out in order to effectively solve the contradiction of high and low temperature performance of asphalt pavement. The contents of this thesis are as follows: 1. Formula design and mechanism performance analysis of wide temperature range modified asphalt based on high and low temperature performance equilibrium. According to the function of different modifiers in asphalt modification, the composition of different materials is carried out in this paper. The formulation design and performance test of modified asphalt with different proportions were carried out and its high and low temperature properties were analyzed. Then, a wide temperature range modified asphalt formula with balanced high and low temperature performance was put forward, and its mechanism and performance were analyzed. 2. New test method and evaluation index design for high and low temperature performance of modified asphalt in wide temperature range. In view of the existing test methods and evaluation index system can not accurately and effectively evaluate the high and low temperature performance of modified asphalt. In this paper, high temperature flow test, low temperature tensile test and corresponding index system are proposed to evaluate the high and low temperature performance of wide temperature modified asphalt, and the constitutive relationship between low temperature and low temperature tensile of modified asphalt is constructed. Curve fitting and other research. 3. Study on construction performance of modified asphalt in wide temperature range. The construction properties of modified asphalt in wide temperature range such as viscosity temperature high temperature storage aging and so on are studied and some reasonable construction suggestions are put forward. 4. Research on wide-temperature modified asphalt mixture based on high-and low-temperature performance equilibrium. In this paper, the gradation design method based on the closest state of mineral aggregate is expounded, and the flow of determining the ratio of oil to stone under this method and an improved method to determine the bulk bulk density of mixture sample, which is modified by wax brushing method, are put forward in the wide temperature range. High and low temperature performance of asphalt mixture. Water stability and other road performance are analyzed. 5. Mechanical properties of modified asphalt mixture in wide temperature range. In this paper, the uniaxial compression and indirect tensile dynamic modulus of modified asphalt mixture in wide temperature range are studied, and the viscoelastic properties of modified asphalt mixture under uniaxial static compression creep test are analyzed. 6. The paving solid engineering verifies the wide temperature range modified asphalt and mixture technology with balanced high and low temperature performance.
【学位授予单位】：北京科技大学
【学位级别】：博士
【学位授予年份】：2015
【分类号】：U414

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