水泥粉媒灰稳定碎石基层的工程应用

发布时间：2018-06-28 18:27

本文选题：基层 + 配合比　；参考：《西安建筑科技大学》2017年硕士论文

【摘要】：基层是路面结构主要承重层,基层质量的好坏对路面的使用寿命有重要影响。在我国,半刚性基层是最广泛应用的基层形式,但是半刚性基层的裂缝等问题制约了其发展,经过近年的试验研究和工程应用,发现水泥粉煤灰稳定碎石基层的路用性能非常优异,不仅在抗裂方面有明显的优势,而且抗冲刷性能好,造价较低。本文以石安改扩建工程为依托,参考其他类型基层的施工工艺,吸收已建成的水泥粉煤灰稳定碎石基层的成功经验,在原材料性能检测合格的前提下,通过分析胶凝材料在混合料中的作用,混合料结构型式的优劣,确定了水泥掺量、水泥粉煤灰比例、集料级配范围,提出了适合本工程的配合比。通过基层试验段施工,根据施工中出现的问题和各项检测结果,明确了设备配置和人员分工,确定了拌和设备、摊铺机、压路机等的作业参数,提出了胶轮压路机和单钢轮强振结合的压实工艺,总结了水泥粉煤灰稳定碎石基层的施工工艺。通过采用双层连铺的施工工艺,提出了双层连铺中应重点注意的问题,与传统单层施工比较,双层连铺层间结合好,并且节省了人力物力,缩短了施工周期。针对施工中经常出现的混合料离析、平整度不佳等质量问题,从集料级配、拌合设备、混合料运输、摊铺和压实等方面,分析了这些问题的影响因素,并提出解决方案。最后,结合设计和规范要求,提出了施工过程中质量控制要点以及工程实体的检验标准。
[Abstract]:The base level is the main bearing layer of the pavement structure, the quality of the base level has an important influence on the service life of the pavement. In our country, the semi-rigid base is the most widely used basic form, but the cracks in the semi-rigid base have restricted its development. The cement fly ash stabilized macadam base has been found through the research and engineering application in recent years. It has excellent road performance, not only has obvious advantages in anti cracking, but also has good anti scouring performance and low cost. Based on the construction technology of other types of base, this paper takes the construction technology of other types of base course and absorbs the successful experience of the stabilized macadam base of cement fly ash. After analyzing the function of the cementitious material in the mixture and the structure type of the mixture, the cement content, the proportion of cement fly ash and the aggregate gradation range are determined, and the fit ratio suitable for this project is put forward. Through the construction of the basic test section, the equipment configuration and personnel division are clearly defined according to the problems in the construction and the results of each item. The working parameters of mixing equipment, paver, roller and so on are fixed, the compaction technology of combination of rubber roller and single steel wheel is put forward, and the construction technology of cement fly ash stabilized macadam base is summed up. Through the construction technology of double deck continuous paving, the key problems should be paid attention to in double deck continuous shop, which are compared with the traditional single layer construction. The combination of layers and layers is good, and the manpower and material resources are saved and the construction period is shortened. According to the quality problems such as aggregate segregation, mixing equipment, mixing material transportation, paving and compaction, the influence factors of these problems are analyzed, and the solutions are put forward in the end. The quality control points in the construction process and the inspection standards of the engineering entities are put forward.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U416.2

【参考文献】