Browse > Article
http://dx.doi.org/10.21289/KSIC.2022.25.2.289

A Study on Corrosion Resistance of CA2-Mixed Paste  

Kim, Jae-Don (Dept. of Civil engineering, Kumoh national Institute of Technology)
Jang, Il-Young (Dept. of Civil engineering, Kumoh national Institute of Technology)
Publication Information
Journal of the Korean Society of Industry Convergence / v.25, no.2_2, 2022 , pp. 289-297 More about this Journal
Abstract
Deterioration in durability of structures due to the steel corrosion is difficult to determine whether or not corrosion is initiated and how much propagated, and moreover, repair and maintenance are not easy to deal with. Therefore, preventive treatments can be the best option to avoid the deterioration. Various methods for preventing corrosion of steel, such as electrochemical treatments, anti-corrosion agents and steel surface coatings, are being developed, but economic and environmental aspects make it difficult to apply them to in-situ field. Thus, the purpose of this study was to improve corrosion resistance by using CA-based clinker that are relatively simple and expected to be economically profitable Existing CA-based clinkers had problems such as flash setting and low strength development during the initial hydration process, but in order to solve this problem, CA clinker with low initial reactivity were used as binder in this study. The cement paste used in the experiments was replaced with CA2 clinker for 0%, 10%, 20%, and 30% in OPC. And the mixture used in the chloride binding test for the extraction of water-soluble chloride was intermixed with Cl- 0.5%, 1%, 2%, and 3% by weight of binder content. To evaluate characteristic of hydration heat evolution, calorimetry analysis was performed and simultaneously chloride binding capacity and acid neutralization capacity were carried out. The identification of hydration products with curing ages was verified by X-ray diffraction analysis. The free chloride extraction test showed that the chlorine ion holding ability improved in order OC 10 > OC 30 > OC 20 > OC 0 and the pH drop resistance test showed that the resistance capability in pH 12 was OC 0 > OA 10 > OA 20 > OA 30. The XRD analyses showed that AFm phase, which can affect the ability to hold chlorine ions, tended to increase when CA2 was mixed, and that in pH12 the content of calcium hydroxide (Ca(OH)2), which indicates pH-low resistance, decreased as CA2 was mixed
Keywords
$CA_2$; Sreel Corrosion; Chloride Binding;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Pei, Xiaofei, et al. "Cementitious coatings for improved corrosion resistance of steel reinforcement." Surface and Coatings Technology 315 (2017): 188-195.   DOI
2 Mohammed, Tarek Uddin, Hidenori Hamada, and Toru Yamaji. "Performance of seawater-mixed concrete in the tidal environment." Cement and concrete research 34.4 (2004): 593-601.   DOI
3 윤일로, and 권용길. "철근콘크리트기둥의 손상지표 설정과 손상도 평가." 한국산업융합학회 논문집 10.3 (2007): 149-155.
4 Choi, Yoon Suk, et al. "Effect of corrosion method of the reinforcing bar on bond characteristics in reinforced concrete specimens." Construction and Building Materials 54 (2014): 180-189.   DOI
5 Hussain, S. Ehtesham, and Ahmed S. Al-Gahtani. "Influence of sulfates on chloride binding in cements." Cement and Concrete Research 24.1 (1994): 8-24.   DOI
6 Ahn, S. H., et al. "Localized corrosion mechanisms of the multilayered coatings related to growth defects." Surface and Coatings Technology 177 (2004): 638-644.   DOI
7 Montes-Garcia, Pedro, V. Jimenez-Quero, and H. Lopez-Calvo. "Assessment of high performance concrete containing fly ash and calcium nitrite based corrosion inhibitor as a mean to prevent the corrosion of reinforcing steel." Journal of Physics: Conference Series. Vol. 582. No. 1. IOP Publishing, 2015.
8 Dias, W. P. S., G. A. P. S. N. Seneviratne, and S. M. A. Nanayakkara. "Offshore sand for reinforced concrete." Construction and Building Materials 22.7 (2008): 1377-1384.   DOI
9 Faustino, Pedro, Ana Bras, and Thomaz Ripper. "The effect of corrosion inhibitors on the modelling of design lifetime of RC structures." Materials and Structures 48.5 (2015): 1303-1319.   DOI
10 Liu, Zhiyong, Lei Yu, and Qingzhong Li. "Synergic mechanism of an organic corrosion inhibitor for preventing carbon steel corrosion in chloride solution." Journal of Wuhan University of Technology-Mater. Sci. Ed. 30.2 (2015): 325-330.   DOI
11 Dong, ShiGang, et al. "Corrosion behavior of epoxy/zinc duplex coated rebar embedded in concrete in ocean environment." Construction and Building Materials 28.1 (2012): 72-78.   DOI
12 Pollmann, Herbert. "Calcium aluminate cements-raw materials, differences, hydration and properties." Reviews in Mineralogy and Geochemistry 74.1 (2012): 1-82.   DOI
13 Kirca, Onder. "Temperature effect on calcium aluminate cement based composite binders." (2006).
14 Matschei, Thomas, Barbara Lothenbach, and F. P. Glasser. "The AFm phase in Portland cement." Cement and concrete research 37.2 (2007): 118-130.   DOI
15 Puerta-Falla, Guillermo, et al. "Monovalent ion exchange kinetics of hydrated calcium-alumino layered double hydroxides." Industrial & Engineering Chemistry Research 56.1 (2017): 63-74.   DOI
16 Ann, Ki Yong, and Chang-Geun Cho. "Corrosion resistance of calcium aluminate cement concrete exposed to a chloride environment." Materials 7.2 (2014): 887-898.   DOI
17 Harrisson, Arthur Michael. "Constitution and Specification of Portland Cement." Lea's Chemistry of Cement and Concrete 5 (2019): 87-155.   DOI
18 Florea, M. V. A., and H. J. H. Brouwers. "Chloride binding related to hydration products: Part I: Ordinary Portland Cement." Cement and Concrete Research 42.2 (2012): 282-290.   DOI
19 Hussain, S. Ehtesham, and S. S. Al-Saadoun. "Effect of tricalcium aluminate content of cement on chloride binding corrosion of reinforcing steel in concrete." Materials Journal 89.1 (1993): 3-12.
20 Hussain, S. E., A. Al-Musallam, and A. S. Al-Gahtani. "Factors affecting threshold chloride for reinforcement corrosion in concrete." Cement and Concrete Research 25.7 (1995): 1543-1555.   DOI
21 Daigle, Edward, Pratheesh George, and Chris Gilmore. "Evaluation and Analysis of Coatings for Rebar and Prestressed Concrete Strands." MATERIALS PERFORMANCE 54.4 (2015): 36-40.