基于预拌—增强技术的环保型沥青混合料研发与应用
发布时间：2018-10-17 15:20
【摘要】：建设资源节约型、环境友好型社会是我国一项长期的战略任务，，在道路工程建设中，我国《交通运输“十二五”发展规划》把温拌沥青铺路技术作为了公路建设节能减排示范推广工程。但是目前国内外温拌技术在降低沥青混合料生产施工温度的同时，也会一定程度上损坏混合料的部分路用性能，而且温拌剂价格普遍昂贵，同时需要添加特殊的生产设备，阻碍了其推广应用。 为了开发一种拥有自主知识产权的环保型沥青混合料技术，并实现温拌沥青混合料技术的大规模推广应用，本文针对软质沥青预拌、岩沥青粉末复拌加强的环保技术路线展开了研究，提出预拌-增强技术环保型混合料的组成设计方法和制备工艺关键控制条件，并对环保型混合料的社会效益和经济效益予以分析，为其推广应用提供指导和参考依据。 首先，分析现有温拌技术的降粘机理和所存在的问题，调查岩沥青在道路工程中的应用情况及其特点，针对岩沥青对基质沥青的改性机理展开研究，结果表明岩沥青可以显著改善基质沥青的性能。 其次，对软硬沥青复合胶结料性能指标和环保型沥青混合料路用性能展开研究，验证基于预拌-增强技术环保型沥青混合料的应用可行性。结果表明环保型混合料在显著降低沥青混合料拌和温度30℃条件下，能够达到与同类型普通热拌沥青混合料相同甚至更优的路用性能。 然后，分析研究预拌-增强技术环保型混合料的制备工艺，包括拌和时间、拌和温度、养护时间以及添加工艺、工序等加工条件对环保型沥青混合料性能的影响规律，总结提出预拌-增强技术环保型混合料的组成设计方法和制备工艺关键控制条件。 最后，分析预拌-增强技术环保型沥青混合料的社会经济效益和应用前景，提出沥青混合料在生产加热过程中的能耗计算方法，综合对比其他温拌技术和普通热拌沥青混合料，结果表明基于预拌-增强技术的环保型沥青混合料具有节能减排、性能优良、建设成本低等优点，具有良好的推广应用价值。
[Abstract]:Building a resource-conserving and environment-friendly society is a long-term strategic task in China. The 12th Five-Year Plan of Transportation in China takes the warm mix asphalt paving technology as the demonstration and extension project of energy saving and emission reduction in highway construction. However, at present, the domestic and foreign warm mix technology can reduce the construction temperature of asphalt mixture, but also damage some of the pavement performance of the mixture to some extent, and the price of warm mix agent is generally expensive, and special production equipment is needed at the same time. It hinders its popularization and application. In order to develop an environmentally friendly asphalt mixture technology with independent intellectual property rights, and to realize the large-scale popularization and application of warm mix asphalt mixture technology, this paper aims at soft asphalt pre-mixing. The environmental protection technical route of rock asphalt powder remixing is studied, and the composition design method and the key control conditions of the preparation technology are put forward. The social and economic benefits of environment-friendly mixture are analyzed to provide guidance and reference for its popularization and application. Firstly, the viscosity reduction mechanism and existing problems of existing warm mixing technology are analyzed, the application and characteristics of rock asphalt in road engineering are investigated, and the modification mechanism of rock asphalt to matrix asphalt is studied. The results show that rock asphalt can significantly improve the performance of base asphalt. Secondly, the performance index of soft and hard asphalt binder and the road performance of environmental protection asphalt mixture are studied to verify the feasibility of environmental friendly asphalt mixture based on ready-reinforced technology. The results show that the environmental friendly mixture can achieve the same or better road performance as the same type of common hot mix asphalt mixture under the condition of significantly reducing the mixing temperature of the asphalt mixture at 30 鈩
本文编号：2277097
[Abstract]:Building a resource-conserving and environment-friendly society is a long-term strategic task in China. The 12th Five-Year Plan of Transportation in China takes the warm mix asphalt paving technology as the demonstration and extension project of energy saving and emission reduction in highway construction. However, at present, the domestic and foreign warm mix technology can reduce the construction temperature of asphalt mixture, but also damage some of the pavement performance of the mixture to some extent, and the price of warm mix agent is generally expensive, and special production equipment is needed at the same time. It hinders its popularization and application. In order to develop an environmentally friendly asphalt mixture technology with independent intellectual property rights, and to realize the large-scale popularization and application of warm mix asphalt mixture technology, this paper aims at soft asphalt pre-mixing. The environmental protection technical route of rock asphalt powder remixing is studied, and the composition design method and the key control conditions of the preparation technology are put forward. The social and economic benefits of environment-friendly mixture are analyzed to provide guidance and reference for its popularization and application. Firstly, the viscosity reduction mechanism and existing problems of existing warm mixing technology are analyzed, the application and characteristics of rock asphalt in road engineering are investigated, and the modification mechanism of rock asphalt to matrix asphalt is studied. The results show that rock asphalt can significantly improve the performance of base asphalt. Secondly, the performance index of soft and hard asphalt binder and the road performance of environmental protection asphalt mixture are studied to verify the feasibility of environmental friendly asphalt mixture based on ready-reinforced technology. The results show that the environmental friendly mixture can achieve the same or better road performance as the same type of common hot mix asphalt mixture under the condition of significantly reducing the mixing temperature of the asphalt mixture at 30 鈩
本文编号：2277097
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