沥青混合料生产配合比变异性控制研究

发布时间：2018-06-21 08:43

本文选题：沥青路面 + 变异性　；参考：《东北林业大学》2014年硕士论文

【摘要】：近年来,我国的高速公路建设规模日益扩大,而且由于沥青路面的诸多优点所建高速公路绝大多数为沥青路面。高速公路沥青路面虽然已形成一套比较成熟完整的施工方法,但在各个施工工艺的质量控制方面还不够完善包括沥青混合料的拌和质量控制、沥青混合料的运输质量控制、沥青混合料的摊铺以及碾压过程中的质量控制等问题。沥青混合料变异性过大会使得路用性能变异性过大,难以保证路面质量和服务水平的均一,更能严重影响路面的使用寿命。沥青混合料生产配合比变异存在于材料的选择、混合料拌和、运输等环节中。在拌和过程中,混合料的颗粒离析极易造成级配变异,沥青加热温度和喷入量造成混合料品质变异,混合料的拌和温度和拌和时间变异也影响到混合料品质的稳定性。本文依托依七高速公路,根据中心实验室给出的目标配合比及工程的生产配合比试拌结果,通过绘制均值控制图和极差控制图,从控制图的变化趋势中判断施工过程是否处于稳定状态,有无异常趋势。另外,通过引入数理统计的方法和原理,进行统计质量控制,有效的控制了沥青混合料生产配合比变异性。本文对依七高速公路生产配合比中的沥青用量、关键性筛孔的通过百分率以及整体变异性产生的原因进行了分析,并对可能发生和已经发生的情况提出了相应的解决措施,为路面的施工提供了优质混合料,对依七高速公路工程建设起到了积极的作用。
[Abstract]:In recent years, the scale of expressway construction in our country is expanding day by day, and most of the highways built due to the advantages of asphalt pavement are asphalt pavement. Although a set of mature and complete construction methods have been formed on the asphalt pavement of expressway, the quality control of each construction process is not perfect, including the mixing quality control of asphalt mixture, the quality control of transportation of asphalt mixture, Paving of asphalt mixture and quality control in rolling process. Due to the excessive variability of asphalt mixture, it is difficult to ensure the uniformity of pavement quality and service level, which can seriously affect the service life of pavement. The mix ratio variation of asphalt mixture production exists in material selection, mixture mixing, transportation and so on. In the mixing process, the segregation of mixture particles is easy to cause gradation variation, asphalt heating temperature and injection amount lead to the mixture quality variation, mixture mixing temperature and mixing time variation also affect the stability of mixture quality. In this paper, we draw the mean value control chart and range control chart according to the target mix ratio given by the central laboratory and the production mix test result of the project based on the Yiqi Expressway. Judging whether the construction process is in a stable state or not and whether there is an abnormal trend from the changing trend of the control chart. In addition, through the introduction of mathematical statistics methods and principles, statistical quality control, effective control of asphalt mixture production mix variability. In this paper, the asphalt dosage, the percentage of critical sieve holes and the causes of overall variability in the production mix ratio of Yi-Qi Expressway are analyzed, and the corresponding solutions to the possible and existing situations are put forward. It provides high-quality mixture for pavement construction and plays an active role in the construction of Yi-Qi Expressway.
【学位授予单位】：东北林业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U414

【参考文献】