Steel Corrosion Induced by Chloride or Carbonation in Mortar with Bending Cracks or Joints
Source abstract
Abstract
Steel in concrete may corrode due to chloride or carbonation especially at cracks and joints. The objective of this study is to experimentally investigate comprehensively the pattern of corrosion cell formation (macrocell and microcell) as well as the corrosion rate using mortar specimens with defects simulating cracks and/or joints. The three important factors are listed as follows: 1) supply position of chloride ions or carbon dioxide, 2) environmental conditions, and 3) water-cement ratio of mortar. The results indicate that, in the case of chloride induced corrosion, decreasing the water-cement ratio (0.3) increased the activity of macrocell prominent corrosion. On the other hand, increasing the water-cement ratio (0.7) increased the activity of microcell prominent corrosion. Therefore, in the presence of defects, a high corrosion rate might be promoted even at a low water-cement ratio. The study also reveals that, in the case of carbonation induced corrosion, macrocell prominent corrosion occurred regardless of the water-cement ratio, and the lower the water-cement ratio, the lower the corrosion rate. Finally, the study proves that the corrosion rate induced by chloride was higher than that induced by carbonation.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Concrete Corrosion and Durability · Corrosion Behavior and Inhibition · Smart Materials for Construction
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Kanazawa Institute of Technology, Hakusan, Ishikawa Prefecture, Japan.
Department of International Department Engineering, Tokyo Institute of Technology, Tokyo, Japan.
References (10)
Show source-provided references
1. Andrade, C., Maribona, I. R., Feliu, S., Gonázlez, J. A. and Feliu, Jr., S. (1992). ”The effect of macrocells between active and passive areas of steel reinforcements.” Corrosion science, 33(2), 237-249.10.1016/0010-938X(92)90148-V ↗
2. Beeby, A. W. (1983). “Cracking, cover, and corrosion of reinforcement.” Concrete International, 5(2), 35-40.
3. Kamiyama, H. (1972). “Cracks in concrete and corrosion of steel bars.” JCA Proceedings of Cement & Concrete, 491-493. (in Japanese)
4. Kiuchi, Y., Miyagawa, T. and Okada, K. (1983). “Electric resistance and oxygen permeation of the concrete.” Annual Report of Japan Society of Civil Engineers, 38(5), 265-266. (in Japanese)
5. Miyagawa, T., Takewaka, K., Demura, K., Masuda, Y. and Moriwake, A. (1998). “Technical committee report on the rehabilitation of concrete structures.” Proceedings of the Japan Concrete Institute, 20(1), 39-48. (in Japanese)
6. Ominda, N. and Kato, Y. (2009). “Macro-cell corrosion in reinforcement of concrete under non-homogeneous chloride environment.” Journal of Advanced Concrete Technology, 7(1), 31-40.10.3151/jact.7.31 ↗
7. Otsuki, N., Marish, S. Madlangbayan, Nishida, T., Saito, T. and Baccay, M. A. (2009). “Temperature dependency of chloride induced corrosion in concrete.” Journal of Advanced Concrete Technology, 7(1), 41-50.10.3151/jact.7.41 ↗
8. Sanjuan, M. A., Andrade, C. and Bentur, A. (1997). “Effect of crack control in mortars containing polypropylene fibers on the corrosion of steel in a cementitious matrix.” ACI Materials Journal, 94(2), 134-141.
9. Schiebl, P. and Raupach, M. (1997). “Laboratory studies and calculations on influence of crack width on chloride induced corrosion of steel in concrete.” ACI Materials Journal, 94(1), 56-62.
10. Tsuru, T., Maeda, R. and Haruyama, S. (1979). “Application of A-C corrosion monitor to localized corrosion.” Corrosion Engineering, 28(12), 638-644. (in Japanese)10.3323/jcorr1974.28.12_638 ↗