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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국콘크리트학회 International Journal of Concrete Structures and Materials International Journal of Concrete Structures and Materials Vol.9 No.2
- 발행연도
- 2015.6
- 수록면
- 241 - 254 (14page)
이용수
초록· 키워드
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A lot of reinforced concrete (RC) structures in Syria went out of service after a few years of construction. This was mainly due to reinforcement corrosion or chemical attack on concrete. The use of blended cements is growing rapidly in the construction industry due to economical, ecological and technical benefits. Syria is relatively rich in scoria. In the study, mortar/concrete specimens were produced with seven types of cement: one plain Portland cement (control) and six blended cements with replacement levels ranging from 10 to 35 %. Rapid chloride penetration test was carried in accordance with ASTM C 1202 after two curing times of 28 and 90 days. The effect on the resistance of concrete against damage caused by corrosion of the embedded steel has been investigated using an accelerated corrosion test by impressing a constant anodic potential. The variation of current with time and time to failure of RC specimens were determined at 28 and 90 days curing. In addition, effects of aggressive acidic environments on mortars were investigated through 100 days of exposure to 5 % H₂SO₄, 10 % HCl, 5 % HNO₃ and 10 % CH₃COOH solutions. Evaluation of sulfate resistance of mortars was also performed by immersing in 5 % Na₂SO₄ solution for 52 weeks. Test results reveal that the resistance to chloride penetration of concrete improves substantially with the increase of replacement level, and the concretes containing scoria based-blended cements, especially CEM II/B-P, exhibited corrosion initiation periods several times longer than the control mix. Further, an increase in scoria addition improves the acid resistance of mortar, especially in the early days of exposure, whereas after a long period of continuous exposure all specimens show the same behavior against the acid attack. According to results of sulfate resistance, CEM II/B-P can be used instead of SRPC in sulfate-bearing environments.
목차
Abstract
1. Introduction
2. Experimental Procedure
3. Discussion of Results
4. Conclusion
References
참고문헌 (53)
참고문헌 신청
[학술지(정기간행물)] - / 1991 / ACI Committee 201. Guide to durable concrete / ACI Materials Journal 88 : 551 ~ 554
[학술지(정기간행물)] - al-Amoudi, O. S. B. / 2002 / Attack on plain and blended cements exposed to aggressive sulfate environments / Cement Concrete Composites 24 : 304 ~ 316
[학술지(정기간행물)] - Al-Chaar, G. K. / 2013 / Natural pozzolan as a partial substitute for cement in concrete / The Open Construction and Technology Journal 7 : 33 ~ 42
[학술지(정기간행물)] - Al-Dulaijan, S. U. / 2003 / Sulfate resistance of plain and blended cements exposed to varying concentrations of sodium sulfate / Cement Concrete Composites 25 : 429 ~ 437
[학술지(정기간행물)] - Al-Tayyib, A. J. / 1990 / Corrosion of steel reinforcement in polypropylene fiber reinforced concrete structures / ACI Materials Journal 87 (2) : 108 ~ 113
[학술지(정기간행물)] - al-Amoudi, O. S. B. / 2002 / Attack on plain and blended cements exposed to aggressive sulfate environments / Cement Concrete Composites 24 : 304 ~ 316
[학술지(정기간행물)] - Al-Chaar, G. K. / 2013 / Natural pozzolan as a partial substitute for cement in concrete / The Open Construction and Technology Journal 7 : 33 ~ 42
[학술지(정기간행물)] - Al-Dulaijan, S. U. / 2003 / Sulfate resistance of plain and blended cements exposed to varying concentrations of sodium sulfate / Cement Concrete Composites 25 : 429 ~ 437
[학술지(정기간행물)] - Al-Tayyib, A. J. / 1990 / Corrosion of steel reinforcement in polypropylene fiber reinforced concrete structures / ACI Materials Journal 87 (2) : 108 ~ 113
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UCI(KEPA) : I410-ECN-0101-2016-532-001923688