青海省沥青路面施工质量控制研究

发布时间：2018-02-02 04:29

本文关键词： 青海省原材料混合料性能质量控制　出处：《长安大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着青海省公路建设的持续深入,沥青路面施工问题导致的质量隐患越来越受到重视,本文结合青海的环境和资源特点,对沥青路面质量控制进行了系统研究。集料的性质直接关系着沥青路面的施工和使用质量。集料强度、颗粒形状、表面纹理、化学性质和集料的吸水率都影响着沥青路面的使用性能。青海省碎石岩性复杂,导致沥青路面施工时原材料的使用性能不尽相同,本文重点研究了不同区域沥青路面施工时对碎石的选用要求,对沥青和集料的技术要求进行研究,提出青海省碎石加工工艺的质量要求和沥青的选用标准。青海省地域辽阔,气候复杂,沥青混合料的使用质量与其息息相关,调查我省不同地区沥青混合料性能指标的适应性;主要研究了沥青混合料的水稳性能、低温稳定性能和高温稳定性能。建议适当调高青南高原大部分地区,以及祁连山脉西北部山区的水稳定性检验技术要求控制,海西地区、祁连山地部分矿产资源丰富地区的沥青混合料高温稳定性能指标相对于现行规范要求,整体上予以适当提高。针对青海省沥青路面施工过程中存在的问题,结合沥青混合料的压实特点,提出了施工工艺各环节的改进方法和质量控制要点,包括原材料的管理,分析了拌和厂生产与控制、沥青混合料的运输、摊铺和碾压各环节存在的问题,同时研究了不同摊铺温度下沥青混合料的老化现象,探索了温拌技术在青海省施工中的应用,室内研究发现温度引起的老化现象较明显,温拌技术可以有效降低沥青混合料的施工温度,其施工性能依然良好。根据研究成果,本课题铺设了试验路,经检测,混合料级配良好,路面的压实效果理想,达到了预期的要求,为青海省后续工程沥青路面的质量控制提供了经验参考。
[Abstract]:With the continuous deepening of highway construction in Qinghai Province, more and more attention has been paid to the quality hidden danger caused by the construction problems of asphalt pavement. This paper combines the environmental and resource characteristics of Qinghai. The quality control of asphalt pavement is systematically studied. The properties of aggregate are directly related to the construction and use quality of asphalt pavement, aggregate strength, particle shape and surface texture. Chemical properties and water absorption of aggregates affect the performance of asphalt pavement. The lithology of crushed stone in Qinghai Province is complex, which leads to the different performance of raw materials in asphalt pavement construction. This paper focuses on the requirements for the selection of crushed stone in different areas of asphalt pavement construction, and the technical requirements of asphalt and aggregate. The paper puts forward the quality requirements of stone processing technology and the selection standard of asphalt in Qinghai Province, which has a vast territory and complex climate, and the use quality of asphalt mixture is closely related to it. To investigate the adaptability of asphalt mixture performance index in different areas of our province; This paper mainly studies the water stability, low temperature stability and high temperature stability of asphalt mixture. In addition, the technical requirements of water stability inspection in the northwestern mountains of Qilian Mountains are controlled, and the performance indexes of asphalt mixtures with high temperature stability in some mineral resource rich areas in Hercynian and Qilian Mountains are relative to the requirements of current codes. In view of the problems existing in the construction process of asphalt pavement in Qinghai Province, combined with the compaction characteristics of asphalt mixture, the improvement methods and quality control points of each link of construction technology are put forward. Including the management of raw materials, the production and control of mixing plant, the transportation of asphalt mixture, the problems of paving and rolling are analyzed, and the aging phenomenon of asphalt mixture under different spreading temperature is studied. The application of warm mixing technology in construction of Qinghai Province is explored. Indoor research shows that the aging phenomenon caused by temperature is obvious, and warm mixing technology can effectively reduce the construction temperature of asphalt mixture. Its construction performance is still good. According to the research results, the subject laid a test road, after testing, the mixture gradation is good, the compaction effect of the pavement is ideal, reached the expected requirements. It provides experience reference for quality control of asphalt pavement in Qinghai province.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.217

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