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The Prediction of Remaining Service Life of Land Concrete Due to Steel Corrosion

철근부식에 의한 육지 콘크리트의 잔존수명 예측

  • 정우용 ((주) 동일기술공사 부설 기술연구소 연구원) ;
  • 윤영수 (고려대학교 토목환경공학과) ;
  • 송하원 (연세대학교 토목공학과) ;
  • 변근주 (연세대학교 토목공학과)
  • Published : 2000.10.01

Abstract

This paper presents the prediction of remaining service life of the concrete due to steel corrosion caused by the following three cases; carbonation, using sea sand and using deicing salts. The assessment of initiation period was generalized considering the existing perdiction models in the literature, corrosion experiment and field assessment. To evaluate the prediction equation of rust growth, the corrosion accelerating experiments was performed. The polarization resistance was measured by potentiostat and the conversion coefficient of polarzation resistance to corrosion rate was determined by the measurement of real mass loss. Chloride content, carbonation, cover depth, relative humidity, water-cement ratio(W/C), and the use of deicing salts were taken into account and the resulting prediction equation of rust growth was proposed on the basis of these properties. The proposed equation is to predict the rust growth during any specified period of time and be effective in particular for predicting service life of concrete in the case of using sea sand.

Keywords

References

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