An Experimental Investigation on Minimum Compressive Strength of Early Age Concrete to Prevent Frost Damage for Nuclear Power Plant Structures in Cold Climates

고경택; 박천진; 류금성; 박정준; 김도겸; 이장화

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자료유형: 학술저널

저자정보: 고경택 박천진 류금성 박정준 김도겸 이장화

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제45권 제3호

발행연도: 2013.1

수록면: 393 - 400 (8page)

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Concrete undergoing early frost damage in cold weather will experience significant loss of not only strength, but also of permeability and durability. Accordingly, concrete codes like ACI-306R prescribe a minimum compressive strength and duration of curing to prevent frost damage at an early age and secure the quality of concrete. Such minimum compressive strength and duration of curing are mostly defined based on the strength development of concrete. However, concrete subjected to frost damage at early age may not show a consistent relationship between its strength and durability. Especially,since durability of concrete is of utmost importance in nuclear power plant structures, this relationship should be imperatively clarified. Therefore, this study verifies the feasibility of the minimum compressive strength specified in the codes like ACI-306R by evaluating the strength development and the durability preventing the frost damage of early age concrete for nuclear power plant. The results indicate that the value of 5 MPa specified by the concrete standards like ACI-306R as the minimum compressive strength to prevent the early frost damage is reasonable in terms of the strength development, but seems to be inappropriate in the viewpoint of the resistance to chloride ion penetration and freeze-thaw. Consequently, it is recommended to propose a minimum compressive strength preventing early frost damage in terms of not only the strength development, but also in terms of the durability to secure the quality of concrete for nuclear power plants in cold climates.

#Cold Weather Concrete #Early Age Frost Damage #Minimum Compressive Strength #Strength Development #Durability

참고문헌 (19)

참고문헌 신청

/ 2001 / JASS 5N, Japanese Architectural Standard Specification, JASS 5N Reinforced Concrete Works at Nuclear Power Plant

/ 2010 / ACI Committee 232, Use of Fly Ash in Concrete

/ 2010 / ACI Committee 306-88, Cold weather concreting

/ 2010 / Code Requirements for Nuclear Safety- Related Concrete Structure and Commentary

A. Nykanen / 1956 / Hardening of concrete at different temperature especially blow the freezing point / RILEM Symposium on Winter Concreting