青川岩沥青改性沥青及其混合料技术性能研究

发布时间：2018-08-17 18:56

【摘要】：青川岩沥青是地壳中的石油类物质在地质环境长期作用下,经过复杂的物理、化学变化后所形成的产物。作为一种自然资源,青川岩沥青不但储量丰富,且路用性能良好,施工工艺简便,价格经济合理,符合我国大力倡导的“资源节约型、环境友好型”社会发展战略。就目前而言,国内在青川岩沥青的工程应用技术方面还不够成熟,对青川岩沥青所具有的实际应用价值还需进行进一步的系统研究。本文结合实际工程需要,对青川岩沥青改性沥青及其混合料的路用性能及其施工技术进行研究,取得的主要研究成果如下:1、通过查阅大量的文献资料,对青川岩沥青的物理力学特性进行了分析,并从微观层面对青川岩沥青的改性机理进行了探讨,为系统了解青川岩沥青改性沥青及其混合料的路用性能提供了一定的基础。2、通过对不同掺量(6%、8%、10%、12%)的青川岩沥青改性沥青进行路用性能试验研究和动态蠕变性能试验研究,并与基质沥青和SBS改性沥青进行了对比分析,发现青川岩沥青的掺加可明显改善沥青的高温稳定性能、水稳定性能、抗老化性能、感温性能及施工和易性能,但对其低温性能存在一定的不利影响。特别是青川岩沥青改性沥青的延度指标与当量脆点T1.2指标的结果不一致,在青川岩沥青改性沥青的低温性能评价方面应结合沥青混合料的低温性能进行合理评价。3、针对实际工程需要,以AC-16C型沥青混合料为基础,对不同掺量(6%、8%、10%)的青川岩沥青改性沥青混合料进行了较为系统的路用性能试验研究,并与同类型的基质沥青混合料和SBS沥青混合料进行了对比分析,研究结果表明,青川岩沥青对沥青混合料的抗永久变形能力、抗水损性能及抗疲劳性能具有良好的改善作用。为了保证青川岩沥青改性沥青混合料的低温抗裂性能,建议岩沥青的掺量最好不要超过8%。在此基础上,对AC-16C型基质沥青混合料及掺量为8%的青川岩沥青改性沥青混合料进行了配合比设计试验研究,为实际工程应用提供了技术依据。4、通过“G207锡海线洛阳境火神凹至参驾店段大修工程”试验路的铺筑,总结了青川岩沥青改性沥青的施工工艺,并对其经济效益及社会效益的进行评价分析,从而对促进青川岩沥青的进一步推广应用具有一定的指导作用。
[Abstract]:Qingchuan rock asphalt is the product of petroleum in the crust after complex physical and chemical changes under the long-term effect of geological environment. As a natural resource, Qingchuan rock asphalt is not only rich in reserves, but also has good road performance, simple construction technology and reasonable price, which conforms to the "resource-saving type" advocated by China. At present, the engineering application technology of Qingchuan rock asphalt in China is not mature enough, and the practical application value of Qingchuan rock asphalt needs further systematic study. The main research results are as follows: 1. Through consulting a large number of documents, the physical and mechanical properties of Qingchuan rock asphalt are analyzed, and the modification mechanism of Qingchuan rock asphalt is discussed from the micro-level, which can provide a systematic understanding of the pavement performance of Qingchuan rock asphalt modified asphalt and its mixture. The pavement performance test and dynamic creep test of modified asphalt with different content of Qingchuan rock asphalt (6%, 8%, 10%, 12%) were carried out. The results showed that the addition of Qingchuan rock asphalt could obviously improve the high temperature stability and water stability of asphalt. In particular, the ductility index of Qingchuan rock asphalt modified asphalt is inconsistent with that of equivalent brittle point T1.2. The evaluation of low temperature performance of Qingchuan rock asphalt modified asphalt should be combined with the low temperature performance of asphalt mixture. Physical evaluation. 3. Based on AC-16C asphalt mixture, the pavement performance of Qingchuanyan rock asphalt modified asphalt mixture with different content (6%, 8%, 10%) was studied systematically. The results showed that Qingchuanyan rock asphalt modified asphalt mixture was better than the same type of matrix asphalt mixture and SBS asphalt mixture. In order to ensure the low temperature crack resistance of Qingchuan rock asphalt modified asphalt mixture, it is suggested that the content of rock asphalt should not exceed 8%. On this basis, the AC-16C base asphalt mixture and Qingchuan asphalt mixture with the content of 8% should be used. The mix proportion design test of rock asphalt modified asphalt mixture is carried out, which provides technical basis for practical engineering application. 4. Through the paving of the test road of "the major repair project from Huoshenwa to Shenjiadian section in Luoyang border of Xihai Line G207", the construction technology of Qingchuan rock asphalt modified asphalt is summarized, and its economic and social benefits are carried out. Evaluation and analysis will play a guiding role in promoting the further popularization and application of Qingchuan rock asphalt.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U414

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