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Assessment of the digestion time of asphalt rubber binder based on microscopy analysis

机译：基于显微镜分析的沥青胶黏剂消解时间评估

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摘要

One of the most promising techniques for increasing the performance of pavement rehabilitation is the use of asphalt rubber mixtures, which utilize crumb rubber from used tires for modifying the asphalt to produce asphalt rubber binder. Crumb rubber can be produced by two different types of grinding, ambient and cryogenic. The asphalt rubber binder used in asphalt rubber mixtures can be obtained through two different processes, terminal blending (produced at a refinery) and continuous blending (produced in a plant). Because the performance of the asphalt rubber binder depends on the elastomeric properties of the crumb rubber, the manufacturing process, especially the digestion time, influences these properties. The digestion time is responsible for the interaction between the crumb rubber and the straight asphalt, which is characterized by the amount of elastomeric properties transferred to the straight asphalt. This paper presents an assessment of the digestion time using conventional performance-related tests and scanning electron microscopy analyses, which examined the surface of asphalt rubber binder. In this study, two straight asphalts with different penetrations and two crumb rubbers, an ambient crumb rubber and a cryogenic crumb rubber, were considered. The asphalt rubber binders studied in this work were produced using different contents of crumb rubber and different digestion times. The objective of this work is to contribute to the assessment of the digestion time of asphalt rubber binder based on microscopy analysis. This paper concluded that scanning electron microscopy is an important tool for defining the digestion time of asphalt rubber binder.
机译：提高路面修复性能的最有前途的技术之一是使用沥青橡胶混合物，该混合物利用废旧轮胎的碎屑橡胶来改性沥青以生产沥青橡胶粘合剂。可以通过环境和低温两种不同类型的研磨来生产粒状橡胶。沥青橡胶混合物中使用的沥青橡胶粘合剂可以通过两种不同的方法获得：末端共混（在炼油厂生产）和连续共混（在工厂生产）。由于沥青橡胶粘合剂的性能取决于粒状橡胶的弹性，因此制造过程（尤其是消解时间）会影响这些性能。消解时间决定了碎屑橡胶和直馏沥青之间的相互作用，其特征在于转移到直馏沥青中的弹性体的数量。本文介绍了使用常规性能相关测试和扫描电子显微镜分析对消解时间的评估方法，该方法检查了沥青橡胶粘合剂的表面。在这项研究中，考虑了具有不同渗透率的两种直馏沥青和两种碎胶，一种环境碎胶和一种低温碎胶。在这项工作中研究的沥青橡胶粘合剂是使用不同含量的粒状橡胶和不同的消化时间生产的。这项工作的目的是基于显微镜分析有助于评估沥青橡胶粘合剂的消解时间。本文得出结论，扫描电子显微镜是确定沥青橡胶粘合剂消解时间的重要工具。

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  • 来源
    《Construction and Building Materials》 |2013年第10期|431-440|共10页
  • 作者

    Liseane P. Thives; Jorge C. Pais; Paulo A.A. Pereira; Glicerio Triches; Sara R. Amorim;

  • 作者单位

    University Federal of Santa Catarina, Department of Civil Engineering, Rua Joao Pio Duarte, 88040-970 Florianopolis, Santa Catarina, Brazil;

    University of Minho, Department of Civil Engineering, Campus of Azurem, 4800-058 Guimaraes, Portugal;

    University of Minho, Department of Civil Engineering, Campus of Azurem, 4800-058 Guimaraes, Portugal;

    University Federal of Santa Catarina, Department of Civil Engineering, Rua Joao Pio Duarte, 88040-970 Florianopolis, Santa Catarina, Brazil;

    University of Minho, Department of Civil Engineering, Campus of Azurem, 4800-058 Guimaraes, Portugal;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Asphalt rubber; Crumb rubber; Digestion time; Scanning electron microscopy;

    机译：沥青橡胶;橡胶屑消化时间;扫描电子显微镜;

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