Investigation on the Bulk Performance and Microstructure of Emulsion-Based, Cold In-Place Recycling Mixtures

    Volume 37, Issue 5 (September 2009)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Published Online: 17 July 2009

    Page Count: 6


    Yan, Jinhai
    School of Transportation, Southeast Univ., Nanjing, Jiangsu Province

    Ni, Fujian
    School of Transportation, Southeast Univ., Nanjing, Jiangsu Province

    Jia, Jonathan
    Emulsion Field Support Manager, Shell (China), Limited, Chao Yang District, Beijing,

    Tao, Zhuohui
    Technical Engineer, Shanghai Application Center, MeadWestvaco Corporation,

    (Received 19 December 2008; accepted 1 June 2009)

    Abstract

    Cold in-place recycling (CIR) using asphalt emulsion is a cost-effective method for the preventive and corrective maintenance of existing pavements. The objectives of this study were to evaluate the recycling mixture’s macroscopic performance and to analyze the microstructure of the mastics using a scanning electron microscope (SEM). The overall performance of the recycling material was evaluated for retained stability, immersed freeze-thaw indirect tension tests, and rut testing. Additionally, the surface micro-profiles of three mastic classes were analyzed using SEM. The results of the bulk property analyses indicated that the addition of cement improved the performance of the recycling mixtures. The SEM analyses showed that cement has an effect similar to fiber-reinforcement in cement-treated asphalt emulsion CIR mixtures. Further, the results indicated that the mechanism of cement action is consistent with the results of the overall mixture performance properties.


    Paper ID: JTE000344

    DOI: 10.1520/JTE000344

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    Title Investigation on the Bulk Performance and Microstructure of Emulsion-Based, Cold In-Place Recycling Mixtures
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