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纳米粒子作为一种对改性沥青性能有所提高的新型材料,已经逐渐的成为改性沥青研究的新方向。本文主要将纳米ZnO粒子和橡胶粉同时加入处于熔融状态的基质沥青中,先普通搅拌然后高速剪切制备纳米ZnO/橡胶粉改性沥青。对纳米ZnO/橡胶改性沥青的常规技术指标和温度影响进行对比与评价,同时分别研究橡胶对改性沥青的改性机理、纳米ZnO对改性沥青的改性机理,以及他们综合改性机理的研究与探讨,并对改性剂材料进行可行性经济分析。结果表明,同时采用搅拌和高速剪切法制得的纳米ZnO/橡胶粉改性沥青可以很好发挥纳米ZnO的特点,改善橡胶粉在沥青中的分散效果,从而使改性沥青的各项性能(特别是高低温性能)有明显的改善与提高,并且指导施工过程中的温度控制和经济可行性。
As a new type of material with improved properties, nano-particles have gradually become the new direction of the research on modified asphalt. In this paper, the nano-ZnO particles and rubber powder are added to the matrix asphalt in a molten state at the same time, and then nano-ZnO / rubber powder modified bitumen is prepared by ordinary stirring followed by high-speed shearing. The conventional technical indexes and temperature influence of nano-ZnO / rubber modified asphalt were compared and evaluated. At the same time, the modification mechanism of rubber on modified asphalt, the modification mechanism of nano-ZnO on modified asphalt, and their comprehensive modification mechanism Of the research and discussion, and modifier material feasibility economic analysis. The results show that the nano-ZnO / rubber modified bitumen obtained by the method of mixing and high-speed shearing can give play to the characteristics of nano-ZnO and improve the dispersing effect of rubber powder in bitumen, so that the properties of modified bitumen Especially high and low temperature performance) has been significantly improved and improved, and to guide the construction process of temperature control and economic feasibility.