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Investigation of the Bond and Deformation Characteristics between an Asphalt layer and a Concrete Slab used as the Trackbed Foundation of an Embedded Rail System for Wireless Trams

무가선 트램용 매립형궤도 아스팔트 포장층의 부착특성 및 변형발생특성 분석

Cho, Hojin;Kang, Yunsuk;Lee, Suhyung;Park, Jeabeom;Lim, Yujin
조호진;강윤석;이수형;박재범;임유진

  • Received : 2016.04.11
  • Accepted : 2016.04.21
  • Published : 2016.04.30

Abstract

Embedded Railway Systems (ERS) will be adapted for wireless trams and will be constructed along city roadways. An asphalt layer should be overlaid on top of the concrete slab used as the trackbed structure in order to ensure smoothness and surface levels equal to those of existing road pavement in downtown city areas. However, the characteristics of an asphalt layer when used as overlay pavement for an ERS are complicated and the behavior of this material is not yet well defined and understood. Therefore, in this study, laboratory shear and tensile bond strength tests were conducted to investigate the bonding behavior of an asphalt layer in a multilayered trackbed section of an ERS. For the laboratory tests, a waterproof coating material was selected as a bonding material between the asphalt overlay and a concrete specimen. Valuable design parameters could be obtained based on the tensile and shear bond strength test results, providing information about the serviceability and durability of the overlaid pavements to be constructed alongside the ERS for wireless trams. In addition, a deformation analysis to assess the tensile strain generated due to truck axle loads at the interface between the asphalt layer and the concrete slab was conducted to verify the stability and performance of the asphalt layer.

Keywords

Wireless tram;Embedded Rail System;Asphalt pavement;Bond strength;Railway trackbed

References

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Acknowledgement

Grant : 무가선 저상트램 실용화

Supported by : 국토교통부