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    Volume 46, Issue 5 (February 2018)

    Cohesive Property Evaluation of Crack Sealants Using a Low-Temperature Tensile Tester

    (Received 4 December 2015; accepted 25 April 2017)

    Published Online: 15 February 2018

    CODEN: JTEVAB

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    Abstract

    This paper presents a new test method that was developed to evaluate the cohesive properties of crack sealants at low temperatures. The low-temperature tensile tester (LTTT) used in this test method was self-developed as a result of field-investigation experiences. Field investigations of crack expansion were conducted in four climate regions in Heilongjiang Province, China, to understand the actual working environment. The LTTT, highly efficient and equipped with a wide measurement range, was then developed. The cohesive specimen is dog-bone shaped and 24 × 24 mm in width and thickness, a size selected based on the test results of various specimen dimensions. The optimal elongation rate was 100 mm/h, and displacement-at-failure emerged as the evaluation index, having been derived from the analysis of test results at various temperatures and elongation rates. According to the results of field investigation, the threshold values of displacement-at-failure were 84, 60, 36, and 28.8 mm, from the lowest to the highest temperature region. The cohesive properties of six types of sealant were assessed on the threshold-evaluation values of the various regions. This test method can effectively differentiate the cohesive properties of various sealants and can be applied in a diversity of climate regions.

    Author Information:

    Xue, Hengxiao
    School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin,

    Cao, Liping
    School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin,

    Hou, Xiangchen
    School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin,

    Tan, Yiqiu
    School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin,


    Stock #: JTE20160319

    ISSN:0090-3973

    DOI: 10.1520/JTE20160319

    Author
    Title Cohesive Property Evaluation of Crack Sealants Using a Low-Temperature Tensile Tester
    Symposium ,
    Committee C24