Evaluation on Surface Scaling and Frost Resistance for concrete Deteriorated due to Cyclic Freezing and Thawing with Inherent Chloride

  • Kim, Gyu Yong (Dept. of Architectural Engineering, Chungnam National University) ;
  • Cho, Bong Suk (Dept. of Architectural Engineering, Chungnam National University) ;
  • Lee, Seung Hoon (The Chief Engineer of Samsung Corporation) ;
  • Kim, Moo Han (Dept. of Architectural Engineering, Chungnam National University)
  • Published : 2007.08.01

Abstract

The purpose of this study is to evaluate freezing-thawing and surface scaling resistance in order to examine the frost durability of concrete in a chloride-inherent environment. The mixing design for this study is as follows: 3 water binder ratios of 0.37, 0.42, and 0.47; 2-ingredient type concrete (50% OPC concrete and 50% ground granulated blast-furnace slag), and 3-ingredient type concrete (50% OPC concrete, 15% fly ash, and 35% ground granulated blast-furnace slag). As found in this study, the decrease of durability was much more noticeable in combined deterioration through both salt damage and frost damage than in a single deterioration through either ofthese; when using blast-furnace slag in freezing-thawing seawater, the frost durability and surface deterioration resistance was evaluated as higher than when using OPC concrete. BF 50% concrete, especially, rather than BFS35%+FA15%, had a notable effect on resistance to chloride penetration and freezing/expansion. It has been confirmed that surface deterioration can be evaluated through a quantitative analysis of scaling, calculated from concrete's underwater weight and surface-dry weight as affected by the freezing-thawing of seawater.

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References

  1. H.J. Gibbs, J.P. Bara, ASTM STP 322, 277 (1962)
  2. J.E. Jennings, K. Knight, Proc. 4th Int. Conf. on soil Mech. and Found. Eng. 1, 316 (1957)
  3. S. Leroueil, J.P. Magnan, Tavenas F. Remblais sur argiles molles., Technique et Documentation - Lavoisier, p.342, Paris, 1985
  4. E.L. Matyas, H.S. Radhakrishna, Geotechnique 18, 432 (1968)
  5. K. Terzaghi, R.B. Peck Soil Mechanics in engineering practice, J. Wiley, New York, 1967
  6. K. Kropp, Performance Criteria for Concrete Durability, RILEM Report 12, 1995
  7. W. F. Cole and B. Kroone, ACI Journal, 31, 1275 (2001)
  8. M.H. Kim, et al, Cement technology contest, 126 (1983)
  9. H. Mihashi, S. Iwagami, Y. Kaneko, Concrete Research and Technology, 10, 143 (1999)