【作者】 李兵；

【导师】 郑南翔；

【作者基本信息】 长安大学 ， 材料学， 2008， 硕士

【摘要】 应力吸收层在延缓或抑制旧水泥混凝土路面反射裂缝方面具有不同于一般防裂措施的优越性,成为旧水泥混凝土路面沥青加铺层结构采用的一种重要技术方案。本文根据深圳市市政道路工程实体要求,通过对国内外应力吸收层的种类、材料及存在问题的分析,提出新型应力吸收层——同步碎石应力吸收层,并对其进行了深入研究。首先,利用ANSYS有限元对应力吸收层加铺结构进行了理论力学分析,综合确定了同步碎石应力吸收层合理厚度、合理模量范围。其次,通过分析同步碎石应力吸收层碎石特征,提出同步碎石应力吸收层所用碎石技术标准;再次,通过高温剪切、拉拔试验,低温疲劳试验,对同步碎石应力吸收层沥青结合料进行了优选。提出以层间抗剪强度为指标的混合料设计方法,确定同步碎石应力吸收层混合料最佳沥青用量、最佳碎石用量。然后,对同步碎石应力吸收层的路用性能进行了综合研究,得出同步碎石应力吸收层具有优良的粘结性能、抗反射裂缝性能,以及低温抗裂性能。最后,对同步碎石应力吸收层施工工艺、施工质量评价进行了研究,并对其经济性进行了分析。本文系统的研究了同步碎石应力吸收层,对其在全国的推广运用具有一定的参考作用。更多还原

【Abstract】 As an important technology for the old cement concrete pavement overlaying, Stress-absorbing interlays have a superior function in the field of delaying or restraining the reflective cracking of the old cement concrete pavement surface. Basing on Shenzhen’s municipal administration road project, through analyzing the traditional stress-absorbing interlays on their classes, materials and existed problems, this essay recommends a new kind of stress-absorbing interlays----synchronous pavement stress-absorbing interlays , and studies it thoroughly.First, this thesis analyses the old cement concrete overlay by the ANSYS finite element method and gets the rational range both thickness and modulus of stress absorbing interlayer. Second, by analyzing the characteristic of crushed stone of synchronous pavement stress-absorbing interlays, it advises the standard requirement for the crushed stone fringe;. By high temperature shearing, drawing experiments, low temperature fatigue tests, this thesis selects the excellent asphalt for the synchronous pavement stress-absorbing interlays. Third, it Suggests the shear strength as index of the commixture designing method to decide the optimum dosages both crushed stone and asphalt. Fourth, through researching the performances of synchronous pavement stress-absorbing interlays, the paper proves the overwhelming priority of the synchronous pavement stress-absorbing interlays on the aspects of joining, resisting rifts, and the low temperature reflecting resisting of crack. At last, the article also discusses the construction handbook, quality evaluating and the economy analyzing.The research result will even play an active role to generalize the synchronous pavement stress-absorbing interlays in the whole country.更多还原