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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.12 No.2
- 발행연도
- 2018.2
- 수록면
- 167 - 178 (12page)
이용수
초록· 키워드
오류제보하기
Chloride ions diffuse through the concrete cover and interact with the cement hydration products. As a result, some chloride ions become chemically and/or physically bound. Free chloride ions are the primary cause of steel corrosion in reinforced concrete structures. In this study, ultrasound was used to detect the presence and binding of chloride ions in cement pastes that contained supplementary cementing materials. Four cement pastes with w/c ratio of 0.55 were prepared and cast into cylindrical specimens that were moist cured for 254 days before being oven dried at 105 ℃. The dried specimens were vacuum-saturated with NaCl solutions at various concentrations. Through-transmission ultrasonic measurements were performed as a function of time using 500 kHz longitudinal wave transducers. The results indicated exponential relationships between energy/amplitude weighted average frequency and the amount of chloride chemically bound by the cement pastes.
목차
Abstract
1. Introduction
2. Experimental Investigation
3. Results and Discussion
4. Conclusions
References
참고문헌 (57)
참고문헌 신청
ACI Committee 228. (2003). In-Place Methods to Estimate Concrete Strength. ACI Committee Reports, (228, 1R), p. 41.
Aggelis, D. G., Shiotani, T., Momoki, S., & Hirama, A. (2009). Acoustic emission and ultrasound for damage characterization of concrete elements. ACI Materials Journal, 106(6), 509?514. https://doi.org/10.14359/51663333.
Al-Mattarneh, H. (2016). Determination of chloride content in concrete using near- and far-field microwave non-destructive methods. Corrosion Science, 105(Supplement C), 133?140. https://doi.org/10.1016/j.corsci.2016.01.010.
Andrade, C., d’Andrea, R., & Rebolledo, N. (2014). Chloride ion penetration in concrete: The reaction factor in the electrical resistivity model. Cement and Concrete Composites, 47(Supplement C), 41?46. https://doi.org/10.1016/ j.cemconcomp.2013.09.022.
Angst, U., & Vennesland, Ø. (2009). Detecting critical chloride content in concrete using embedded ion selective electrodes? effect of liquid junction and membrane potentials. Materials and Corrosion, 60(8), 638?643. https://doi.org/ 10.1002/maco.200905280.
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UCI(KEPA) : I410-ECN-0101-2018-532-001807812