Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Study of structural properties and development of high strength Cured-In-Place Pipe (CIPP) liner for sewer pipes using glass fiber

유리섬유를 이용한 하수관의 고강도 현장경화 비굴착 보수 공법 재료의 개발 및 물성 특성 연구

  • Ji, Hyon Wook (Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology) ;
  • Koo, Dan Daehyun (Department of Engineering Technology, Indiana University-Purdue University Indianapolis) ;
  • Yoo, Sung Soo (Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology) ;
  • Kang, Jeong-Hee (Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology)
  • 지현욱 (한국건설기술연구원 국토보전연구본부) ;
  • ;
  • 유성수 (한국건설기술연구원 국토보전연구본부) ;
  • 강정희 (한국건설기술연구원 국토보전연구본부)
  • Received : 2020.02.14
  • Accepted : 2020.03.31
  • Published : 2020.04.15
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Abstract

Cured-in-place-pipe(CIPP) is the most adopted trenchless application for sewer rehabilitation to extend the life of the existing sewer without compromising both direct construction and indirect social costs especially applied in the congested urban area. This technology is globally and domestically known to be the most suitable for partial and full deteriorated pipe structure rehabilitation in a sewer system. The typical design of CIPP requires a significant thickness of lining to support loading causing sewage flow interruption and increasing material cost. This paper presents development of a high strength glass fiber composite lining material for the CIPP application and structural test results. The test results exhibit that the new glass fiber composite lining material has 12 times of flexural strength, 6.2 times of flexural modulus, and 0.5 Creep Retention Factor. These test results can reduce lining design thickness 35% at minimum. Even though taking into consideration extra materials such as outer and inner films for actual field applications, the structural capacity of the composite material significantly increases and it reduces 20 percent or more line thickness as compared to the conventional CIPP. We expect that the newly developed CIPP lining material lowers material costs and minimizes flow capacity reduction, and fully replaceable to the conventional CIPP lining materials.

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References

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