[논문]CA2 혼입 페이스트의 부식저항성에 관한 연구

김재돈; 장일영

doi:10.21289/ksic.2022.25.2.289

CA2 혼입 페이스트의 부식저항성에 관한 연구
A Study on Corrosion Resistance of CA2-Mixed Paste 원문보기

한국산업융합학회 논문집 = Journal of the Korean Society of Industry Convergence, v.25 no.2/1, 2022년, pp.289 - 297

김재돈 (금오공과대학교 토목공학과) , 장일영 (금오공과대학교 토목공학과)

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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

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표/그림 (7)

표 Table 1. Physical and chemical properties of CA₂
표 Table 2. Mix design of CA₂-mixed paste
그림 Fig. 1 Cumulative heat of hydration according to substitution rate
그림 Fig. 2 Cumulative heat of hydration according to substitution rate2
그림 Fig. 3 Binding capacity
그림 FIg. 4 Acid neutralization capacity
그림 Fig. 5 XRD Pattern of CA2-mixed paste

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CA2 혼입 페이스트의 부식저항성에 관한 연구
A Study on Corrosion Resistance of CA2-Mixed Paste 원문보기

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CA2 혼입 페이스트의 부식저항성에 관한 연구 A Study on Corrosion Resistance of CA2-Mixed Paste 원문보기

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CA2 혼입 페이스트의 부식저항성에 관한 연구
A Study on Corrosion Resistance of CA2-Mixed Paste 원문보기

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