道路灌缝材料低温粘聚性—粘附性统一评价及失效判别方法研究

发布时间：2019-05-06 14:04

【摘要】：目前,在我国灌缝维修是最为广泛应用的一种路面病害治理方法。实践证明,对于沥青路面产生早期病害尤其是早期线状裂缝的情况,通过裂缝修补的方法可有效延长路面的使用寿命。而近年来在灌缝胶使用过程中,普遍出现了早期失效现象,尤其是在低温与交通荷载共同条件下,出现以粘附性和粘聚性失效为主的损坏现象。因此,有必要对灌缝材料的失效程度判别方法以及灌缝材料粘聚性-粘附性统一评价体系的建立展开相对应的研究。主要内容如下:首先,基于已开发的道路灌缝材料低温性能测试仪,研制开发了适用于灌缝材料低温粘聚性-粘附性统一评价试验夹具及模具。在此基础上,采用室内试验模拟方法,研究了不同种类的灌缝胶的粘聚性及粘附性性能参数(破坏应变、破坏应力等)随试验温度、加载速率、试件尺寸等试验参数的变化规律,确定统一的粘聚性-粘附性试验参数及试验方法。之后,通过室内试验结果,研究确定灌缝胶低温粘聚性-粘附性统一评价指标(破坏应力、破坏应变、应变能等),并对各指标的影响分别进行分析。针对灌缝胶的自身性能,分析灌缝胶的老化特性、粘度、玻璃态转化温度Tg等参数对粘聚性、粘附性统一评价指标的影响规律。针对裂缝壁特性,分析了石料的种类对灌缝材料低温粘聚性-粘附性的影响。最后,选取黑龙江地区典型路段进行了灌缝材料失效情况的跟踪调查工作,设计了一种新的适用于长期调查的方法,结果表明,灌缝胶的早期失效以粘聚性失效与粘附性失效为主,在现场实际中,同样可使用开裂宽度为评价指标对其进行统一评价,结合实际情况,提出了灌缝材料失效的评价方法。
[Abstract]:At present, grouting joint maintenance is one of the most widely used pavement disease treatment methods in China. It has been proved in practice that the service life of asphalt pavement can be prolonged effectively by means of crack repair in the case of early disease, especially in the case of early linear cracks. In recent years, early failure has occurred in the process of grouting adhesive, especially under the condition of low temperature and traffic load, the failure of adhesion and cohesion is the main failure phenomenon. Therefore, it is necessary to study the method of judging the failure degree of the joint material and the establishment of the unified evaluation system of the cohesion and adhesion of the joint material. The main contents are as follows: firstly, based on the developed low-temperature performance tester for road joint materials, a uniform test fixture and die for low-temperature cohesion-adhesion evaluation of joint materials is developed. On the basis of this, the cohesion and adhesion performance parameters (failure strain, failure stress, etc.) of different kinds of stitch adhesive were studied with the experimental temperature and loading rate, by means of laboratory test simulation method. The uniform cohesion-adhesion test parameters and test methods are determined according to the variation rule of test parameters such as specimen size and so on. After that, the unified evaluation indexes (failure stress, failure strain, strain energy, etc.) of low-temperature cohesion-adhesion of grout glue are determined by laboratory test results, and the influence of each index is analyzed separately. In this paper, the influence of aging characteristics, viscosity and glass state transition temperature (Tg) on adhesion and adhesion of stitch adhesive was analyzed in accordance with its own properties, and the influence of parameters such as aging property, viscosity and glass state transition temperature on the unified evaluation index of adhesion and adhesion was analyzed. According to the characteristics of crack wall, the influence of the type of stone on the low-temperature cohesion-adhesion of the grouted material was analyzed. Finally, a new method suitable for long-term investigation is designed to track and investigate the failure of filling joint materials in typical sections of Heilongjiang Province. The results show that: In the field practice, the crack width can be used as the evaluation index to evaluate the early failure of the joint adhesive. Combined with the actual situation, the evaluation method of the failure of the joint material is 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】：2015
【分类号】：U414

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