温拌阻燃沥青及其混合料技术性能研究

发布时间：2018-11-08 10:00

【摘要】：随着我国高等级公路的快速发展,长大隧道工程越来越多。沥青路面具有噪音低和行车舒适等优点,作为典型的路面结构在公路工程中得到广泛应用。由于沥青是可燃材料,需要进行阻燃处理才能够在隧道路面工程中进行应用,因此,隧道沥青路面的防火安全问题受到国内外的广泛关注。温拌沥青混合料可以解决路面施工过程中的高排放和高能耗问题,对于隧道路面可以显著改善施工环境。本文以满足实际工程需要为主要目的,对温拌阻燃沥青及其混合料的技术性能进行了较为系统的研究,取得的主要研究成果如下:1、基于SBS改性沥青,分别采用沥青常规性能试验和Superpave性能试验,对温拌阻燃沥青的技术性能进行了研究,分析了不同掺量的阻燃剂和温拌剂对沥青性能的影响,并通过极限氧指数试验评价了温拌阻燃沥青的阻燃性能。研究结果表明:掺加阻燃剂不仅可以提高沥青的阻燃性能,同时可以有效改善其高温性能,提高其PG高温等级,但对沥青的低温性能会产生一定的不利影响。2、针对实际工程情况,分别对SBS改性沥青混合料和温拌阻燃沥青混合料进行了配合比设计,通过高温车辙试验、水稳定性试验、低温弯曲小梁试验及疲劳试验对沥青混合料的路用性能进行了研究,分析了不同阻燃剂掺量对沥青混合料路用性能的影响,并通过燃烧试验评价了温拌阻燃沥青混合料的阻燃性能。研究结果表明:掺加阻燃剂可以提高沥青混合料的高温抗车辙能力和疲劳性能,对混合料低温抗裂性能的影响并不显著,但对混合料水稳定性具有一定不利的影响。综合试验结果,推荐阻燃剂的最佳掺量为沥青用量的8%。3、通过对试验路铺筑情况进行综合分析,总结了温拌阻燃沥青混合料的施工工艺,分析了温拌阻燃沥青路面的节能减排效果,并对温拌阻燃沥青的经济效益和环境效益进行了评价分析。本文的研究成果已在郑州市中原路西延工程项目中得到成功应用,能够为相关类似工程提供一定的技术参考。
[Abstract]:With the rapid development of high-grade highway in China, there are more and more tunnel projects. Asphalt pavement has the advantages of low noise and comfortable driving. As a typical pavement structure, it is widely used in highway engineering. Because asphalt is a combustible material, flame retardant treatment is needed to be used in tunnel pavement engineering. Therefore, the fire safety of tunnel asphalt pavement is widely concerned at home and abroad. Warm mix asphalt mixture can solve the problems of high emission and high energy consumption during pavement construction, and can improve the construction environment of tunnel pavement significantly. In order to meet the needs of practical engineering, the technical properties of warm mix flame retardant asphalt and its mixture are studied systematically in this paper. The main research results are as follows: 1, based on SBS modified asphalt, The technical properties of warm mix flame retardant asphalt were studied by conventional performance test and Superpave performance test, and the effects of different amount of flame retardant and warm mix agent on asphalt performance were analyzed. The flame retardancy of warm-mixed flame-retardant asphalt was evaluated by limiting oxygen index test. The results show that the addition of flame retardant can not only improve the flame retardancy of asphalt, but also improve its high temperature performance and PG grade effectively, but it will have a certain adverse effect on the low temperature performance of asphalt. According to the actual engineering situation, the mixture ratio design of SBS modified asphalt mixture and warm mix flame retardant asphalt mixture was carried out, and the high temperature rutting test and water stability test were carried out. The pavement performance of asphalt mixture was studied by low temperature bending trabecular test and fatigue test, and the influence of different content of flame retardant on pavement performance of asphalt mixture was analyzed. The flame-retardance of warm-mixed flame-retardant asphalt mixture was evaluated by combustion test. The results show that the addition of flame retardant can improve the rutting resistance and fatigue performance of asphalt mixture at high temperature, and the effect on the low temperature crack resistance of asphalt mixture is not significant, but it has a certain adverse effect on the water stability of the mixture. According to the comprehensive test results, the best amount of flame retardant is recommended as 8. 3 of the asphalt content. Through the comprehensive analysis of the paving condition of the test road, the construction technology of the warm mix flame retardant asphalt mixture is summarized. The energy saving and emission reduction effect of warm mix flame-retardant asphalt pavement is analyzed, and the economic and environmental benefits of warm mix flame-retardant asphalt are evaluated and analyzed. The research results of this paper have been successfully applied in the project of west extension of Zhongyuan Road in Zhengzhou, which can provide some technical reference for similar projects.
【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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