• Received : 2012.07.20
  • Accepted : 2012.12.18
  • Published : 2013.06.25


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.


Supported by : Korea Institute of Energy Technology Evaluation and Planning (KETEP)


  1. A.G.A. Saul, "Principles underlying the steam curing of concrete at atmospheric pressure", Magazine of Concrete Research, Vol.2, pp.127-140 (1951)
  2. A. Nykanen, "Hardening of concrete at different temperature especially blow the freezing point, RILEM Symposium on Winter Concreting, Session B (1956)
  3. KHNP Report, Durability Improvement of N.P.P Concrete through the Alternation of Cement Type" (2002)
  4. ACI Committee 349, Code Requirements for Nuclear Safety- Related Concrete Structure and Commentary, American Concrete Institute (2010)
  5. JASS 5N, Japanese Architectural Standard Specification, JASS 5N Reinforced Concrete Works at Nuclear Power Plant", Architectural Institute of Japan (2001)
  6. P.K. Mehta, P.J.M. Monteiro, Concrete, Microstructure, Properties and Materials, 3rd Edition, McGraw-Hill (2006)
  7. G.C. Lee, M.C. Han, D.H. Baek, K.T. Koh, "Effect of heat curing on the temperature history and strength development of slab concrete for nuclear power plant structures in cold climates", Nuclear Engineering and Technology, Vol.44, No.5, pp.523-534 (2012)
  8. ACI Committee 232, Use of Fly Ash in Concrete, American Concrete Institute (2010)
  9. ACI Committee 306-88, Cold weather concreting (2010)
  10. K.T. Koh, I. Iwaki, and T. Miura, "Reduction of quality and countermeasure of self-compacting concrete incorporating ground granulated blast-furnace slag due to initial frost damage, Journal of Japan Society of Civil Engineering, No.641, V-46, pp.1-13(2000)
  11. G. Moller, "Resistance of concrete to early frost action, Summary report prepared for RILEM Committee on winter concreting, RILEM, 1960.
  12. A.M. Neville, Properties of Concrete, Fourth & Final Edition, Prentice Hall (2002)
  13. V.M. Malhotra, C. Berwanger, "Effect of below freezing temperatures on strength development of concrete," ACI Journal, No.74, 37-58 (1973)
  14. T.C. Powers, "Prevention of frost damage to green concrete", RILEM Bulletin, NO.4, pp.120-124 (1962)
  15. C.J. Bernhardt, "Damage due to freezing of fresh concrete", Journal of American Concrete Institute, No.52, pp.573-580 (1956)
  16. S.T. Yi, S.W. Pae, J.K. Kim, "Minimum curing time prediction of early-age concrete to prevent frost damage", Construction and Building Materials, No.25, pp.1439-1449 (2011)
  17. K.T. Koh, D.G. Kim, M.S. Cho, and Y.C. Song, "A study on the deterioration prediction method of concrete structures subjected to cyclic freezing and thawing, Journal of the Korea Institute for Structural Maintenance and Inspection, Vol.5, No.1, pp.131-140 (2001)
  18. N.S. Berke and M.C. Hicks, "Predicting chloride profiles in concrete", Corrosion, pp.234-239 (1994)
  19. P. Klieger, "Effect of mixing and curing temperature on concrete strength", ACI Journal, Vol.54, pp1063-1082 (1958)