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A Study on Survey of Carbonation for Sound, Cracked, and Joint Concrete in RC Column in Metropolitan City  

Kwon, Seung Jun (비앤티 엔지니어링)
Park, Sang Sun (비앤티 엔지니어링)
Nam, Sang Hyuk (연세대학교 토목공학과)
Cho, Ho Jin (대림산업(주) 기술연구소)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.11, no.3, 2007 , pp. 116-122 More about this Journal
Abstract
The concrete structures in Metropolitan city are usually exposed to carbonation and corrosion of embedded steel occurs due to the carbonation. In inspection and diagnosis of concrete structures, carbonation depth in sound concrete is mainly evaluated and service life for concrete structure is predicted based on the result. Generally, however, mass concrete structures such as columns have construction joint for suitable placing and also have cracks in early-age. In this study, carbonation depth in RC columns used for 20 years in metropolitan city is evaluated and also analyzed by considering the local conditions like sound, cracked, and joint area. The carbonation depth in cracked and joint area is more rapid than that in sound area, and it is thought to be more desirable to consider this effect in concrete structures with small cover depth. Furthermore, the technique for carbonation prediction in cracked concrete is derived in terms of crack width and the results from this technique are verified by comparing those from previous research.
Keywords
Carbonation; Concrete; Service life; Crack; Construction joint;
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