지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국콘크리트학회 International Journal of Concrete Structures and Materials International Journal of Concrete Structures and Materials Vol.5 No.1
- 발행연도
- 2011.6
- 수록면
- 65 - 73 (9page)
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초록· 키워드
오류제보하기
Corrosion of steel bars embedded in concrete admixed with 0%, 2% and 4% calcium nitrite (CN), having compressive strengths of 20 and 46 MPa was investigated. Reinforced concrete specimens were immersed in 3% NaCl solutions for 1, 7 and 15 days where 0.4A external current was applied to accelerate the chemical reactions. Corrosion rate was measured by retrieving electrochemical data via potentiodynamic polarization technique. Pull-out tests of reinforced concrete specimens were then conducted to assess the corroded steel-concrete bond characteristics. Experimental results showed that corrosion rate of steel bars and steel-concrete bond strength were dependent on concrete strength, amount of CN added and accelerated corrosion period. As concrete strength increased from 20 to 46 MPa, corrosion rate of embedded steel decreased. The addition of 2% CN to concrete of 20 MPa was not effective in retarding corrosion of steel at long time of exposure. However, the combination of higher strength concrete and 2% or 4% CN appear to be a desirable approach to reduce the effect of chloride-induced corrosion of steel reinforcement. After 1 day of corrosion acceleration, specimens without CN showed higher bond strength in both concrete mixes than those with CN. After 7 and 15 days of exposure, the higher concentration of CN, the higher bond strength in both concrete mixes achieved, except for the concrete specimen of 20 MPa compressive strength with 2% CN that recorded the highest deterioration in bond strength at 15 days of exposure.
목차
Abstract
1. Introduction
2. Expermental program
3. Expermental results
4. Discussions
References
참고문헌 (22)
참고문헌 신청
1. [학술지(정기간행물)] - Page, C. L. / 1982 / Aspects of Electrochemistry of Steel in Concrete / Nature 297 : 109 ~ 116
2. [학술지(정기간행물)] - Valcarece, M. B. / 2008 / Carbon Steel Passivity Examined in Alkaline Solutions: The Effect of Chloride and Nitrite Ions / Electrochimica Acta 53 : 5007 ~ 5015
3. [학술지(정기간행물)] - Cabrera, J. / 1996 / Deterioration of Concrete due to Reinforcement Steel Corrosion / Cement and Concrete Composites 18 : 47 ~ 59
4. [학술지(정기간행물)] - Chung, L. / 2008 / Bond strength prediction for reinforced concrete members with highly corroded reinforcing bars / CEMENT & CONCRETE COMPOSITES 30 : 603 ~ 611
5. [학술지(정기간행물)] - Rashid, M. / 2010 / Effect of Strength and Covering on Concrete Corrosion / European Journal of Scientific Research 40 : 492 ~ 499
2. [학술지(정기간행물)] - Valcarece, M. B. / 2008 / Carbon Steel Passivity Examined in Alkaline Solutions: The Effect of Chloride and Nitrite Ions / Electrochimica Acta 53 : 5007 ~ 5015
3. [학술지(정기간행물)] - Cabrera, J. / 1996 / Deterioration of Concrete due to Reinforcement Steel Corrosion / Cement and Concrete Composites 18 : 47 ~ 59
4. [학술지(정기간행물)] - Chung, L. / 2008 / Bond strength prediction for reinforced concrete members with highly corroded reinforcing bars / CEMENT & CONCRETE COMPOSITES 30 : 603 ~ 611
5. [학술지(정기간행물)] - Rashid, M. / 2010 / Effect of Strength and Covering on Concrete Corrosion / European Journal of Scientific Research 40 : 492 ~ 499
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UCI(KEPA) : I410-ECN-0101-2014-530-002799733