【作者】 李慧川；

【导师】 廖利；

【作者基本信息】 华中科技大学 ， 环境工程， 2006， 硕士

【摘要】 本文在了解目前国内外改性沥青的研究现状及发展趋势的基础上,分析了城市生活垃圾中的废旧包装PE塑料改性道路沥青的可行性以及利用废旧包装PE塑料改性道路沥青来处理城市生活垃圾中的废塑料的优势,得出了研究废旧包装PE改性沥青对提高沥青路面的使用性能和回收利用废旧包装PE均有着重要意义,也是我国道路建设发展的迫切需要的结论。本文从废旧包装PE塑料改性沥青的路用性能入手,详细分析了基质沥青被废旧包装PE塑料改性后的性能变化情况,证实了废旧包装PE塑料改性沥青的可行性。考察了改性前后沥青的软化点、针入度以及低温延度的变化情况,并对实验数据进行处理,分别考察了改性前后沥青的感温性、高温稳定性和低温抗裂性能的变化情况,证实改性后沥青的各项路用性能均得到不同程度的改善,尤其是沥青的感温性和高温稳定性得到大幅度的改善。同时,考察了不同的废旧包装PE塑料用量、反应时间以及反应温度对改性沥青性质的影响,并对有关工艺参数进行了优化。本文分析了废旧包装PE塑料改性沥青的改性机理,机理分析主要从改性沥青机理、影响沥青改性效果的因素两方面进行了论述。对改性沥青机理分别从相容性、溶胀、新胶体结构等三个方面进行了探讨,对影响沥青改性效果的因素则分别从废旧包装PE改性剂、基质沥青和改性工艺三个因素入手进行了探讨。更多还原

【Abstract】 Based on the present research and developing trend of modified asphalt in our country and outsides, this paper analyses the feasibility that use the waste plastic-package PE(Polyethylene) from urban waste as road bitumen modifier and the superiority that use the waste plastic-package PE as road bitumen modifier to deal with the waste plastics in the urban waste, and had a result that research the waste plastic-package PE as road bitumen modifier was not only had great importance to improve quality of road asphalt and reuse of the waste plastic-package PE from urban waste, but also had great necessity for our country’s progress in road construction.This paper analyses waste plastic-package PE modified asphalt that improves quality in application of radices,analyses in detail that the changes of asphalt’s properties before and after the modify by the waste plastic-package PE, confirmed the feasibility that use the waste plastic-package PE as road bitumen modifier. The studies are focused on the changes of modified asphalt’s softening point, penetration and low-temperature ductility, and also analyses the experiment data, focused on the changes of modified asphalt’s temperature-sensibility and high-and-low temperature performance. It confirmed that all of asphalt’s properties had been improved, especially the temperature-sensibility and high temperature performance. Meanwhile, studied how the following factors effect the performance of the properties of he modified asphalt: different dosage of waste plastic-package PE, reaction temperature and residual time, and also optimize the process parameters.This paper analyses the mechanism of the waste plastic-package PE modified asphalt. From the mechanism of asphalt modify and the factors affect the modify results, modification mechanism can be analyzed. Analyses the mechanism of asphalt modify from three factors: compatibility, swelling and new structure of colloidal. Analyses the factors affect the modify results also from three factors: waste plastic-package PE modifier, matrix asphalt and modification.更多还原