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A micromechanical model to evaluate the impact of air void content and connectivity in the oxidation of asphalt mixtures

机译:评估空隙率和连通性对沥青混合料氧化影响的微力学模型

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摘要

Asphalt oxidation is a chemical reaction between asphalt binders and oxygen that causes irreversible changes in the properties of asphalt materials used in pavement structures. This paper explores the influence of the air void phase of asphalt mixtures on oxidation. Microstructures of an asphalt mixture with probable internal air void structures were generated and implemented in finite elements, and they were used in combination with oxygen diffusion and chemical kinetics models to estimate the changes generated in the mechanical properties of the material. The results confirm that the air void phase strongly impacts the stiffening processes caused by oxidation in asphalt mixtures.
机译:沥青氧化是沥青粘合剂与氧气之间的化学反应,会导致路面结构所用沥青材料的性能发生不可逆转的变化。本文探讨了沥青混合料的气孔相对氧化的影响。具有有限内部元素的沥青混合料的微观结构已生成并实现为有限元,并与氧扩散和化学动力学模型结合使用以估计材料机械性能的变化。结果证实,气孔相强烈影响由沥青混合物中的氧化引起的硬化过程。

著录项

  • 来源
    《Construction and Building Materials》 |2014年第30期|181-190|共10页
  • 作者单位

    Department of Civil and Environmental Engineering, Universidad de los Andes (Bogota), Carrera 1 Este # 19A-40 Edificio ML, Bogota, Colombia;

    Department of Civil and Environmental Engineering, Universidad de los Andes (Bogota), Carrera 1 Este # 19A-40 Edificio ML, Bogota, Colombia;

    Department of Mechanical Engineering, Universidad de Los Andes (Bogota), Carrera 1 Este # 19A-40 Edificio ML, Bogota, Colombia;

    GRODCO, Calle 100 # 13-21, 8th Floor, Bogota, Colombia;

  • 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 mixtures; Oxidation; Micromechanical model; Air voids;

    机译:沥青混合料;氧化;微机械模型;空气空隙;

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