S221渭河大桥水泥混凝土桥面沥青铺装技术研究

发布时间：2018-07-11 15:46

  本文选题：水泥混凝土桥面 + 沥青混合料铺装　； 参考：《长安大学》2017年硕士论文

【摘要】：铺装沥青混合料与桥面混凝土在性能上存在较大差异,易导致沥青铺装层产生早期损坏,这不仅妨碍了车辆公路交通运输安全,还会造成巨大的经济损失。论文依托S221渭河大桥,开展水泥混凝土桥面沥青铺装技术研究具有重要的实用价值和现实意义。论文分析了水泥混凝土桥面沥青铺装层间病害形式和成因,主要病害形式有沥青铺装层推移、脱落、车辙和拥包、裂缝等,车辆荷载大、黏结层材料强度低性能差、高温的影响、水的作用和施工质量控制不严等是引起水泥混凝土桥面沥青铺装层间病害的主要原因。对AC-16改性沥青混合料和AC-20沥青混合料配合比进行了优化设计,性能试验结果表明,设计的沥青混合料具有优良的路用性能,其中动稳定度分别为5263次/min和3666次/min。采用剪切试验,研究了不同法向力、不同配方、不同洒布量和不同温度条件下的水性环氧乳化沥青黏结层的抗剪强度,确定了不同温度条件下的抗剪强度指标c和φ值;采用拉拔试验,研究了不同配方、不同洒布量和不同温度条件下的水性环氧乳化沥青黏结层的抗拔强度。由此确定了水性环氧乳化沥青黏结层的最佳洒布量和最佳配方,其中最佳配方为Ⅱ组,即A(环氧树脂):B(固化剂):C(乳化沥青)=16:4:80,最佳洒布量为0.6kg/m2。研究提出了水泥混凝土桥面沥青铺装施工技术。通过本文的研究以期水泥混凝土桥面沥青铺装技术水平的提高,改善桥面铺装结构的使用性能,防止早期病害,延长使用寿命。
[Abstract]:There is a great difference between pavement asphalt mixture and bridge deck concrete in performance, which can easily lead to early damage of asphalt pavement, which not only hinders the safety of vehicle traffic and transportation, but also causes huge economic losses. It is of great practical value and practical significance to study asphalt pavement technology of cement concrete bridge deck based on S 221 Weihe River Bridge. The paper analyzes the form and cause of asphalt pavement disease on cement concrete bridge deck. The main disease forms are asphalt pavement, shedding, rutting and packing, cracks, high vehicle load, low strength of adhesive layer, and so on. The influence of high temperature, the action of water and the lax control of construction quality are the main causes of asphalt pavement diseases on cement concrete bridge deck. The mixture ratio of AC-16 modified asphalt mixture and AC-20 asphalt mixture is optimized. The performance test results show that the designed asphalt mixture has excellent pavement performance, in which the dynamic stability is 5263 / min and 3666 / min respectively. The shear strength of waterborne epoxy emulsified asphalt adhesive layer under different normal forces, different formulations, different sprinkling amount and different temperature was studied by shear test, and the shear strength indexes c and 蠁 were determined under different temperature conditions. The pull-out strength of waterborne epoxy emulsified asphalt adhesive layer with different formulation, different distribution amount and different temperature was studied by drawing test. Thus, the optimum distribution and formulation of waterborne epoxy emulsified asphalt adhesive layer are determined. The optimum formula is group 鈪，

本文编号：2115732