【作者】 牛智华；

【导师】 郑南翔；

【作者基本信息】 长安大学 ， 材料学， 2011， 硕士

【摘要】 本文针对水泥混凝土路面白改黑中的应力吸收层展开研究,对防止旧水泥混凝土路面裂缝的反射、提高白改黑路面的使用性能和延长使用寿命均具有重要的使用价值；同时,对于应力吸收层结合料采用废旧轮胎橡胶粉改性沥青,实现废旧轮胎的循环再生利用,既能节约工程造价,又能保护环境,具有重要的经济效益、社会效益、环境效益。本文首先使用ABAQUS对应力吸收层的结构进行分析,建立模型对应力吸收层的受力状态进行了模拟,提出了应力吸收层合理的模量和厚度的范围。通过对橡胶沥青的试验研究,运用沥青常规指标以及锥入度,低温弯曲指标综合分析确定了应力吸收层所用橡胶沥青橡胶粉的掺量、无机外加剂优化方案以及高粘剂掺量,最后设计出了高性能橡胶沥青。通过对橡胶沥青混合料的研究,利用低温弯曲试验、韧度试验、层间粘结试验来综合评价橡胶沥青混合料的性能。最终确定了新型应力吸收层形式——SATI (Stress Absorbing Toughness Interlayer),一种高韧性,低模量以橡胶沥青作为结合料的应力吸收层形式。最后通过对SATI和砂粒式沥青混凝土应力吸收层的材料和成本进行分析,对SATI的实际工程可行性进行了考证。更多还原

【Abstract】 The essay researched on stress absorbing layer when cement concrete pavement additionally paved with asphalt concrete; the research plays a significant role in preventing early cement concrete pavement cracks reflection, improving additional asphalt concrete pavement service performance and prolonging its life expectancy. Meanwhile, the essay applies waste tire rubber modified asphalt in stress absorbing layer binder; this method is construction cost-saving and environment-friendly, which would not only fulfill waste tire cyclic utilization, but also be of great significance to economical, social, and environmental benefits.The essay first applies ABAQUS to analyze stress absorbing layer structure, and builds model to simulate stress state of stress absorbing layer, and then put forward a reasonable stress absorbing layer modulus and thickness range.Through the experiment research on rubber asphalt, applying conventional indicators of asphalt, cone penetration, and the index of low temperature flexibility, the essay comprehensively analyzes, then defines the qualities of rubber ashes and high viscosity added in rubber asphalt stress absorbing layer, and optimal plan of inorganic additives, finally arrive at a high-performance rubber asphalt.Through the research on rubber asphalt mixture, applying Low temperature flexibility test, toughness test, interlayer bonding test, the essay is able to comprehensively evaluate the propriety of rubber asphalt mixture. Conclusively, the author determine to take the new style—SATI (Stress Absorbing Toughness Interlayer) as the form of absorbing layer, which is a kind of high toughness, low modulus absorbing layer form taken rubber asphalt as mixture.Finally, the essay verifies the SATI real practices feasibility through the analysis of SATI and sand asphalt concrete materials and costs.更多还原