乳化沥青冷再生混合料水稳定性影响因素研究

发布时间：2018-09-10 11:43

【摘要】：随着我国沥青混凝土路服务期的增长,越来越多的路面进入大中修时期,维护、维修量不断增加,很多废旧铣刨料需要妥善处理,各种各样的再生技术也应用其中,新的技术及科研成果也在这一过程中不断产生和得到利用。这其中就包括在我国应用越来越广泛的厂拌乳化沥青冷再生技术。乳化沥青再生混合料中既有废旧路面材料,又有新材料的加入,新旧材料的组合使其具有新的性能特性。其中,路面材料的水稳定性是工程界特别关心的问题,并且其影响因素较多,因素之间关系复杂。本文首先以与水损害所有关的沥青混凝土路面病害种类和水损害发生的原因机理展开讨论,简要概括了国内外学者对乳化沥青冷再生混合料的相关研究近况。以厂拌乳化沥青冷再生的技术特点为重点,介绍了乳化沥青冷再生混合料的常规使用范围以及其技术自身的优缺点。阐述了其路面使用性能和强度形成机理,并且对集料与乳化沥青之间的粘结剥落原理进行了分析,提出了主要因素与厂拌乳化沥青冷再生水稳定性相关。采用正交试验的方法减少试验数目,探索各个与乳化沥青冷再生混合料水稳定性有关的主要因素的显著性大小和是否在各因素之间存在明显的交互影响。试验设计为三因素三水平,表采用L27(313)正交表,按L27(313)交互用表设计表头。选用的主要影响因素是水泥添加量、乳化沥青用量、水的使用量,都以RAP用量为基础作外比。紧密结合本文依托项目,考虑相关学者试验方法,确定各因素的水平变化范围:水泥水平为1%、2%、3%,水用量为3%、4%、5%,乳化沥青沥青用量为2%、3%、4%。以浸水劈裂强度与劈裂强度比来表征抗水损害能力的大小。为了定量确定各影响因素的显著水平大小和各个因素之间的交互作用强弱,使用SPSS19软件进行多因素方差分分析,并进一步探讨试验结果可能的原因,揭示各因素间潜在的非线性关系,讨论产生这种关系的原因。以试验分析结果为基础,对混合料主要影响因素和交互作用做出论断,以期望按照此论断设计出的混合料在抵抗水损害方面有更出色的表现。
[Abstract]:With the increase of service period of asphalt concrete road in our country, more and more pavement has entered the period of large and medium repair, and the maintenance and maintenance quantity is increasing constantly. Many waste milling and planing materials need to be properly treated, and a variety of recycling technologies are also applied. New technologies and scientific research achievements have been produced and utilized in this process. This includes cold recycling technology of emulsified asphalt which is widely used in our country. Emulsified asphalt recycled mixture has both waste pavement materials and new materials. The combination of new and old materials makes it have new performance characteristics. Among them, the water stability of pavement materials is of special concern to the engineering field, and its influence factors are many, and the relationship between factors is complex. In this paper, the types of asphalt concrete pavement diseases related to water damage and the cause mechanism of water damage are discussed, and the recent researches on emulsified asphalt cold recycled mixture are briefly summarized. Focusing on the technical characteristics of cold recycling of emulsified asphalt, the conventional application range of cold recycled asphalt mixture and its own advantages and disadvantages are introduced. This paper expounds the pavement performance and strength formation mechanism, analyzes the principle of bond spalling between aggregate and emulsified asphalt, and points out that the main factors are related to the stability of cold reclaimed water of mixed emulsified asphalt. The orthogonal test method was used to reduce the number of tests and to explore the significance of the main factors related to the water stability of emulsified bitumen cold recycled mixture and whether there was obvious interaction between the factors. The design of the test is three factors and three levels. The table adopts the L27 (313) orthogonal table and the head is designed according to the L27 (313) interactive table. The main factors affecting the selection are cement content, emulsified asphalt content and water usage, all of which are based on the RAP content as the external ratio. Based on the project of this paper, considering the experimental methods of relevant scholars, the range of the level change of each factor is determined: the cement level is 1 and the level of the cement is 2%, and the quantity of water is 3% and 4%, and the amount of emulsified asphalt is 2% 3% and 4%. The ratio of splitting strength to splitting strength is used to characterize the ability of water damage resistance. In order to determine quantitatively the significant level of each factor and the interaction between each factor, the multivariate variance analysis was carried out with SPSS19 software, and the possible causes of the test results were discussed. Reveal the potential nonlinear relationships among factors and discuss the causes of such relationships. Based on the results of test and analysis, this paper makes a conclusion on the main factors and interaction of mixture, in order to expect that the mixture designed according to this conclusion will have better performance in resisting water damage.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414

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