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.

ABSTRACT
1. 서 론
2. 실험 재료 및 방법
    2.1 단기특성시험
    2.2 장기특성시험
3. 결과 및 고찰
    3.1 단기강도특성
    3.2 장기강도특성
4. 결 론
References

• 지현욱(한국건설기술연구원 국토보전연구본부) | Hyon Wook Ji (Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology)
• Dan Daehyun Koo(Indiana University-Purdue University Indianapolis, Department of Engineering Technology)
• 유성수(한국건설기술연구원 국토보전연구본부) | Sung Soo Yoo (Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology)
• 강정희(한국건설기술연구원 국토보전연구본부) | Jeong-Hee Kang (Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology) Corresponding author