【作者】 陈卫峰；

【导师】 高培伟；

【作者基本信息】 南京航空航天大学 ， 道路与铁道工程， 2008， 硕士

【摘要】 本文在现有机场混凝土道面裂缝研究的基础上,结合混凝土道面实际受力状况、裂缝的特征及修补材料现状,采用本课题组研制的新型道面裂缝修补材料JC对机场道面混凝土裂缝进行修补,并与某进口新型修补材料RW、环氧树脂(EP)和聚合物改性水泥(PAE)进行对比,以评价机场道面混凝土裂缝修补后的性能。论文全面系统地研究了JC、EP、RW、PAE四种修补材料对机场道面混凝土裂缝修补后的力学性能、抗冲击性能、耐久性能,运用有限元分析机场道面水泥混凝土开裂修补前后的力学性能响应。本研究是导师申请的国家自然科学基金项目(批准号60672166)的子课题,主要研究内容如下:1.系统研究了四种修补材料对机场道面混凝土裂缝修补后的力学性能影响,研究结果表明:除PAE外,其他三种修补材料对道面裂缝修补后的各项力学性能指标均不低于原基体强度的80%,课题组研制的JC的裂缝修补效果较好;2.研究了裂缝修补后混凝土的抗氯离子渗透和硫酸盐侵蚀性能。试验中选用了氯化钠、硫酸钠溶液作为腐蚀性介质,以浸泡后的抗折、抗压强度损失率做为耐腐蚀性指标,试验结果表明:JC的修补后抗氯离子渗透和硫酸盐侵蚀性能较好;3.采用ANSYS分析了机场道面混凝土开裂修补前后的力学性能响应,比较分析裂缝修补前后的力学性能变化。更多还原

【Abstract】 A new patching material JC was used to repair surface cracks in airport cement concrete pavement. In this article, the actual stress conditions, features of crack and repairing material performance were analysized based on the current research results of cracks. The performance of airport concrete after repairing was evaluated by comparing the repairing material with an imported new repair material RW, epoxy resin (EP) and polymer modified cement (PAE).In this paper, the mechanical properties including impact resistance, and durability of JC, epoxy resin (EP), RW and polymer modified cement (PAE) used as repair material for airport pavement concrete cracks were investigated. The finite element analysis was used to determine the mechanical responses of airport pavement concrete cracks before and after repair, too. As a subtopic of the project of National Natural Science Foundation, the research work was supported by National Natural Science Foundation of China (60672166). The major contents are mainly summarized as follows:1. The mechanical properties of the four repairing materials when used to repaire cracks were studied and the results showed that except the polymer (PAE) modified cement, the mechanical properties of specimens repaired with the other three material is not lower than 80% of concrete specimen without cracks, and the JC is better;2. The resistances to chloride ion difussion and the sulfate attack after repairing were studied. The flexural or compressive strength losses of specimens were determined after sodium chloride and sodium sulfate solution immergence. It was indicated that JC was not as good as RW, but better than EP and PAE;3. ANSYS was used to analyze the mechanical property response of airport surface concrete crack before and after repairing.更多还原