道路灌缝材料低温粘附性试验方法和影响因素研究

发布时间：2018-06-16 08:26

本文选题：沥青路面 + 灌缝材料　；参考：《哈尔滨工业大学》2014年硕士论文

【摘要】：沥青类灌缝材料是目前应用最广泛的路面裂缝修补材料，通过对裂缝进行修补，防止水和其他杂质进入裂缝中，对面层或基层产生危害。但在大温差地区，灌缝材料常因为低温性能不满足要求而在施工后较短时期内就失效。灌缝材料的失效一般有两种形式：粘附性破坏和粘聚性破坏。其中，粘附性破坏是灌缝材料失效的主要形式。但是，目前对灌缝材料的粘附性破坏还没有公认的、合理的评价方法。因此，本文主要对灌缝材料的低温粘附性能进行研究，提出灌缝材料低温粘附性能的试验方法，并在此基础上分析低温粘附性能的影响因素。本文的主要内容如下：首先，对黑龙江省各温度区划内的裂缝失效情况进行了现场调查，分析了灌缝材料粘附性失效、粘聚性失效比例，结果表明，黑龙江省的灌缝材料失效率很高，高达70%。然后，在现有国外灌缝材料路用性能评价方法的基础上，针对黑龙江省灌缝材料失效的情况，提出了灌缝材料现场性能的评价指标。其次，针对黑龙江省灌缝材料粘附性高失效率的现状，基于现有的道路灌缝材料低温性能测定仪，开发了适用于低温粘附性试验的新型夹具，并提出了灌缝材料低温粘附性的试验方法。在此基础上，通过研究试件尺寸、试验温度和加载速率等参数对灌缝材料低温性能的影响，提出了适用的粘附性试验参数和评价方法。再次，基于提出的灌缝材料粘附性评价方法，对灌缝材料与沥青混凝土试块粘结面进行了分析，，并分析了粘结面处石料、胶浆和孔隙的分布状况、粘结面的级配类型和粘结面处掺入砂石等情况对灌缝材料低温粘附性的影响。结果表明：采用不同级配的沥青混凝土试块进行试验时，灌缝材料的粘附性破坏形式存在差别，破坏的机理也不相同。通过掺砂试验发现，粘结面有砂会降低灌缝材料的粘附性能。最后，通过灌缝材料粘附性实验，评价了五种灌缝材料的低温粘附性，分析了灌缝材料的自身材料参数对粘附性的影响，结果表明：常规的沥青材料低温性能评价方法及粘度等指标与其低温粘附性有一定相关性，其中，玻璃化转变温度与灌缝材料低温性能相关性较好。并根据灌缝材料失效情况的调查结果和室内试验的结果，提出了改善灌缝材料粘附性能的建议。
[Abstract]:Asphalt jointing material is the most widely used pavement crack repair material at present. By repairing the crack, water and other impurities can be prevented from entering the crack, and the opposite layer or base course will cause harm. However, in the large temperature difference area, the jointing material often fails in the short period after construction because of the low temperature performance. There are generally two forms of failure of jointing materials: adhesive failure and cohesive failure. Among them, adhesive failure is the main form of failure of jointing materials. However, at present, there is no accepted and reasonable evaluation method for the adhesion damage of grouting joint materials. Therefore, this paper mainly studies the low-temperature adhesion property of the jointing material, and puts forward the test method of the low-temperature adhesion property of the jointing material, and then analyzes the influencing factors of the low-temperature adhesion property. The main contents of this paper are as follows: firstly, the field investigation of fracture failure in various temperature divisions of Heilongjiang Province is carried out, and the failure ratio of adhesion and cohesion of filling joint materials is analyzed. The results show that, The failure rate of jointing materials in Heilongjiang Province is very high, as high as 70. Then, on the basis of the existing overseas evaluation methods of the pavement performance of the jointing materials, the evaluation index of the field performance of the jointing materials in Heilongjiang Province is put forward. Secondly, aiming at the current situation of high failure rate of adhesion of jointing materials in Heilongjiang Province, a new type of fixture suitable for low temperature adhesion test is developed based on the existing low-temperature performance tester of jointing materials for road irrigation. A test method for the low temperature adhesion of the jointing material was proposed. On this basis, the effects of the parameters such as specimen size, test temperature and loading rate on the low temperature properties of jointing materials were studied, and the suitable adhesion test parameters and evaluation methods were put forward. Thirdly, based on the proposed method for evaluating the adhesion of jointing materials, this paper analyzes the bonding surfaces of grouting materials and asphalt concrete test blocks, and analyzes the distribution of stone, mortar and pores at the bonding surfaces. The influence of the gradation type of the bonding surface and the addition of sand and stone on the low temperature adhesion of the filling joint material. The results show that when the asphalt concrete test blocks with different gradation are used, the adhesion failure forms of the filling joint materials are different, and the failure mechanism is also different. It is found that the bonding surface with sand can reduce the adhesion of the filling joint material. Finally, the low temperature adhesion of five kinds of jointing materials was evaluated by the adhesion experiment of the filling joint material, and the influence of the material parameters on the adhesion was analyzed. The results show that the low temperature performance evaluation method and viscosity of asphalt materials have some correlation with their low temperature adhesion, among which the glass transition temperature has a good correlation with the low temperature properties of the jointing materials. According to the results of the investigation and the laboratory tests, some suggestions for improving the adhesion of the jointing materials are put forward.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U414

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