直投式改性剂的厂拌混合料性能试验研究
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    摘要:

    在排水路面中应用的改性沥青,一般采用湿法工艺,湿法改性的沥青拥有着良好的性能。但随着湿法改性沥青的应用,改性沥青面临着易离析、成本高、质量难控制等一些问题。直投式改性剂的应用是采用干法工艺,其先与集料进行拌和,后加入沥青等材料制备得到沥青混合料。直投式改性剂的应用,避免了湿法工艺带来的不足,本次研究选取了对各方面性能表现优异的直投型高粘直投式改性剂,采用干法工艺对沥青混合料进行厂拌,包括其在室内拌合中干拌时间,干拌温度对混合料性能的影响,指导厂拌干法工艺的确定。并选取试验工程中的沥青混合料进行取样分析,研究厂拌干法工艺制备的混合料性能与室内混合料性能差异。

    Abstract:

    The modified asphalt used in permeable pavement generally adopts wet process, and the wet modified asphalt has good performance. However, with the application of wet modified asphalt, modified asphalt is facing some problems, such as easy segregation, high cost and difficult quality control. The application of direct injection modifier adopts dry process, which is mixed with aggregate first, and then asphalt and other materials are added to prepare asphalt mixture. The application of direct feed modifier avoids the shortcomings brought by wet process. In this study, 直投型高粘 direct feed modifier with excellent performance in all aspects is selected to use dry process for plant mixing of asphalt mixture, including the influence of dry mixing time and dry mixing temperature on mixture performance in indoor mixing, so as to guide the determination of plant mixing dry process. The asphalt mixture in the test project is selected for sampling and analysis to study the performance difference between the mixture prepared by plant mixing dry process and indoor mixture.

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  • 收稿日期:2021-10-19
  • 最后修改日期:2021-10-19
  • 录用日期:2021-10-29
  • 在线发布日期: 2022-07-21
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