Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Assessment of Residual Tensile Strength on Cast Iron Water Pipes

주철관의 잔존강도 평가에 관한 연구

  • 배철호 (한국수자원공사 수자원연구원 상하수도연구소) ;
  • 김주환 (한국수자원공사 수자원연구원 상하수도연구소) ;
  • 김정현 (한국수자원공사 수자원연구원 상하수도연구소) ;
  • 홍성호 (숭실대학교 환경화학공학과)
  • Received : 2006.08.22
  • Accepted : 2006.11.24
  • Published : 2006.12.15
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Abstract

The goal of this study is to assess cast iron pipes (CIPs) and present a residual tensile strength prediction model using pit characteristics and fracture toughness. The results is the followings. First, average pit depths of collected CIPs were in the range from 0.63 to 6.49 mm, loss of tensile strength compared with net metallic tensile strength were from -7.06 to 67.91 percent. Second, fracture toughness for NS-CR-1, NS-CR-2, and NS(2)-CR-1 were in the range from 62.85 to $89.39kgf/mm^2{\sqrt{mm}}$, and average of those samples was $73.69kgf/mm^2{\sqrt{mm}}$ on CIPs. Third, the models developed in this study by using pit characteristics and fracture toughness showed a little good correlation for measured residual tensile strength, and the results will be expected to help for water utilities to manage CIPs in the aspect of rehabilitation and assessment of structural safety on CIPs.

Keywords

References

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