半刚性基层长寿命沥青路面典型沥青混合料疲劳性能研究

发布时间：2018-03-04 16:07

本文选题：半刚性基层　切入点：长寿命　出处：《交通部公路科学研究院》2014年硕士论文　论文类型：学位论文

【摘要】：长寿命沥青路面是目前国际上路面研究的热点，而半刚性基层沥青路面是我国最典型的高速公路结构形式。在总结国内外长寿命路面宝贵经验的基础上修筑符合我国国情的半刚性基层长寿命沥青路面是一个重要目标，而对于典型结构中常用材料的疲劳性能的研究，是保证其满足长寿命路面路用性能要求的关键。本文首先对SAC系列沥青混合料进行无侧限抗压强度和抗压回弹模量试验，，全面分析了沥青品种、级配、最大公称粒径等变量对混合料力学性能的影响，建立了材料、体积参数与混合料力学性能之间的回归方程，为进一步全面评价SAC系列混合料疲劳性能提供参考。然后从沥青混合料室内疲劳试验入手，分析了目前疲劳试验方法、疲劳破坏标准、疲劳寿命预估等方面差异对沥青混合料疲劳性能评价的影响。针对半刚性基层长寿命沥青路面典型结构的两种典型沥青混合料，利用四点弯曲疲劳试验对两种材料在不同控制模式、温度的疲劳性能进行了评价；同时提出了两种材料在不同温度下的疲劳耐久极限，并运用BISAR软件验算材料在结构中是否满足结构要求。此外，本文还开发了一套全新的实时温度-应变采集系统，对两种典型材料的线收缩系数进行了试验测试；同时运用温度收缩应变和弯拉应变叠加的原理，将原有的疲劳方程进行了修正。
[Abstract]:Long-life asphalt pavement is a hot spot in the international pavement research. The semi-rigid asphalt pavement is the most typical form of expressway structure in China. It is an important goal to construct the semi-rigid base asphalt pavement with long life on the basis of summing up the valuable experience of domestic and foreign long-life pavement. The research on fatigue performance of common materials in typical structures is the key to meet the road performance requirements of long life pavement. In this paper, the unconfined compressive strength and modulus of resilience of SAC series asphalt mixture are tested, and the influence of asphalt varieties, gradation and maximum nominal particle size on the mechanical properties of asphalt mixture is analyzed, and the material is established. The regression equation between volume parameters and mechanical properties provides a reference for further comprehensive evaluation of fatigue properties of SAC series mixtures. Then starting with the indoor fatigue test of asphalt mixture, the current fatigue test method, fatigue failure standard, The influence of fatigue Life Prediction on fatigue performance Evaluation of Asphalt mixture. Two kinds of typical Asphalt mixture with long Life Asphalt pavement with Semi-rigid Base course, The fatigue properties of two kinds of materials under different control modes and temperatures were evaluated by four-point bending fatigue test, and the fatigue endurance limits of two kinds of materials at different temperatures were put forward. And the BISAR software is used to check whether the material meets the structural requirements in the structure. In addition, a new real-time temperature-strain acquisition system is developed to test the linear shrinkage coefficients of two typical materials, and the principle of superposition of temperature shrinkage strain and flexural strain is applied. The original fatigue equation is modified.
【学位授予单位】：交通部公路科学研究院
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U414;U416.217

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