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Development of Freeze-Thaw Water Retention Test Apparatus for Coarse Granular Materials

  • Tomoyuki AoyagiEmail author
  • Jiaqiang Yang
  • Shingo Matsutani
  • Tatsuya Ishikawa
  • Takahisa Nakamura
  • Yoshitsugu Momoya
Conference paper
Part of the Lecture Notes in Civil Engineering book series (LNCE, volume 29)

Abstract

With time passing, the performance of railway ballasted track and road pavement gradually degrades along with the degradation in railroad ballast and base course layer. However, the Japanese design standard does not consider the age-related deterioration of ballasted track and asphalt pavement. To establish a rational maintenance method of aged ballasted track and road pavement, this study focused on the water retentivity. In this paper, a water retention test apparatus was newly developed to carry out water retention test for coarse granular materials subjected to freeze-thaw. The test samples are Toyoura sand, clean and fouled ballast, and new and aged crusher runs. First, the performance of the newly developed test apparatus was examined by comparing the test results of water retention tests of this paper with the past researches. Second, the influence of age-related degradation for coarse granular materials on the water retentivity was discussed by comparing the test results for aged test samples with the new ones. As a result, the following findings were obtained: (a) The developed test apparatus can carry out highly accurate water retention tests in a wide suction range and greatly shorten the testing time. (b) SWCC is seriously affected by the intrusion of fouling materials, regardless of the sample.

Keywords

Water retention Age-related deterioration Coarse granular materials 

References

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Tomoyuki Aoyagi
    • 1
    Email author
  • Jiaqiang Yang
    • 1
  • Shingo Matsutani
    • 1
  • Tatsuya Ishikawa
    • 2
  • Takahisa Nakamura
    • 3
  • Yoshitsugu Momoya
    • 3
  1. 1.Graduate School of EngineeringHokkaido UniversitySapporoJapan
  2. 2.Faculty of EngineeringHokkaido UniversitySapporoJapan
  3. 3.Railway Technical Research InstituteTokyoJapan

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