Computers and Concrete

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Effects of loading conditions and cold joint on service life against chloride ingress

  • Yang, Keun-Hyeok (Department of Plant Architectural Engineering, Kyonggi University) ;
  • Mun, Ju-Hyun (Department of Plant Architectural Engineering, Kyonggi University) ;
  • Yoon, Yong-Sik (Department of Civil and Environmental Engineering, Hannam University) ;
  • Kwon, Seung-Jun (Department of Civil and Environmental Engineering, Hannam University)
  • Received : 2018.02.22
  • Accepted : 2018.09.04
  • Published : 2018.09.25
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Abstract

RC (Reinforced Concrete) members are always subjected to loading conditions and have construction joints when constructed on a big scale. Service life for RC structure exposed to chloride attack is usually estimated through chloride diffusion test in sound concrete, however the test is performed without consideration of effect of loading and joint. In the present work, chloride diffusion coefficient is measured in concrete cured for 1 year. In order to evaluate the effect of applied load, cold joint, and mineral admixtures, OPC (Ordinary Portland Cement) and 40%-replaced GGBFS (Ground Granulated Blast Furnace Slag) concrete are prepared. The diffusion test is performed under loading conditions for concrete containing cold joint. Investigating the previous test results for 91 days-cured condition and the present work, changing diffusion coefficients with applied stress are normalized considering material type and cold joint. For evaluation of service life in RC continuous beam with 2 spans, non-linear analytical model is adopted, and service life in each location is evaluated considering the effects of applied stress, cold joint, and GGBFS. From the work, varying service life is simulated under various loading conditions, and the reduced results due to cold joint and tensile zone are quantitatively evaluated. The effect of various conditions on diffusion can provide more quantitative evaluation of chloride behavior and the related service life.

Keywords

Acknowledgement

Supported by : National Research Foundation of Korea (NRF)

References

  1. Abe, Y. (1999), "Result of reference review on crack width effect to carbonation of concrete", Proc. Symp.: Rehab. Concrete Struct., 1(1), 7-14.
  2. ACI 224.3R-95 (2001), Joints in Concrete Construction, USA, American Concrete Institute, 389, Reapproved.
  3. Arya, C. and Newmann, J.B. (1990), "Assessment of four methods of determining the free chloride content of concrete", Mater. Struct., 23(5), 319-330. https://doi.org/10.1007/BF02472710
  4. Banthia, N., Biparva, A. and Mindess, S. (2005), "Permeability of concrete under stress", Cement Concrete Compos., 35(9), 1651-1655. https://doi.org/10.1016/j.cemconres.2004.10.044
  5. Broomfiled, J.P. (1997), Corrosion of Steel in Concrete: Understanding, Investigation and Repair, E&FN, London.
  6. Choi, S.J., Kang, S.P., Kim, S.C. and Kwon, S.J. (2015), "Analysis technique on water permeability in concrete with cold joint considering micro pore structure and mineral admixture", Adv. Mater. Sci. Eng., 2015, 1-10.
  7. Erdem, T.K. and Kirca, O. (2008), "Use of binary and ternary blends in high strength concrete", Constr. Build. Mater., 22(7), 1477-1483. https://doi.org/10.1016/j.conbuildmat.2007.03.026
  8. Escalante, J.I., Gomez, L.Y., Johal, K.K., Mendoza, G., Mancha, H. and Mendez, J. (2001), "Reactivity of blast-furnace slag in Portland cement blends hydrated under different conditions", Cement Concrete Res., 31(10), 1403-1409. https://doi.org/10.1016/S0008-8846(01)00587-7
  9. Hoseini, M., Bindiganabile, V. and Banthia, N. (2009), "The effect of mechanical stress on permeability of concrete: a review", Cement Concrete Compos., 31(4), 213-220. https://doi.org/10.1016/j.cemconcomp.2009.02.003
  10. Ishida, T. and Maekawa, K. (2003), "Modeling of durability performance of cementitious materials and structures based on thermohygro physics", Proceedings of the 2nd International RILEM Workshop on Life Prediction and Aging Management of Concrete Structures, Paris, France.
  11. Ishida, T., Maekawa, K. and Kishi, T. (2007), "Enhanced modeling of moisture equilibrium and transport in cementitious materials under arbitrary temperature and relative humidity history", Cement Concrete Res., 37(4), 565-578. https://doi.org/10.1016/j.cemconres.2006.11.015
  12. Jang, S.Y., Karthick, S. and Kwon, S.J. (2017), "Investigation on durability performance in early aged high-performance concrete containing GGBFS and FA", Adv. Mater. Sci. Eng., 2017, 1-11.
  13. JSCE- Japan Society of Civil Engineering (2000), Concrete Library, Concrete Cold Joint Problems and Countermeasures.
  14. JSCE- Japan Society of Civil Engineering (2007), Standard Specification for Concrete Structures-Materials and Construction.
  15. Kim, D.H., Lim, N.G. and Horiguchi, T. (2009), "Effect of compressive loading on the chloride penetration of concrete mixed with granulated blast furnace slag", J. Korea Inst. Build. Constr., 9(6), 71-78. https://doi.org/10.5345/JKIC.2009.9.6.071
  16. Kwon, S.J. and Na, U.J. (2011), "Prediction of durability for RC columns with crack and joint under carbonation based on probabilistic approach", Int. J. Concrete Struct. Mater., 5(1), 11-18. https://doi.org/10.4334/IJCSM.2011.5.1.011
  17. Kwon, S.J., Na, U.J., Park, S.S. and Jung, S.H. (2009), "Service life prediction of concrete wharves with early-aged crack: Probabilistic approach for chloride diffusion", Struct. Saf., 31(1), 75-83. https://doi.org/10.1016/j.strusafe.2008.03.004
  18. Lee, B.Y., Ismail, M.A., Kim, H.J., Yoo, S.W. and Kwon, S.J. (2017), "Numerical technique for chloride ingress with cover concrete property and time effect", Comput. Concrete, 20(2), 185-196. https://doi.org/10.12989/CAC.2017.20.2.185
  19. Mun, J.M. (2016), Evaluation of Chloride Diffusion Coefficients in Cold Joint Concrete Considering Loading Conditions and Slag, Master's Degree, Hannam University.
  20. Oh, K.S. and Kwon, S.J. (2017), "Chloride diffusion coefficient evaluation in 1 year-cured OPC concrete under loading conditions and cold joint", J. Korea Inst. Struct. Maint. Insp, 21(5), 21-29. https://doi.org/10.11112/JKSMI.2017.21.5.021
  21. Poulsen, E. (1993), "On a model of chloride ingress into concrete, nordic miniseminar-chloride transport", Department of Building Materials, Chalmers University of Technology, Gothenburg.
  22. RILEM (1994), "Durability design of concrete structures", Report of RILEM Technical Committee 130-CSL, E&FN, 28-52.
  23. Song, H.W. and Kwon, S.J. (2009), "Evaluations of chloride penetration in high performance concrete using neural network algorithm and micro pore structure", Cement Concrete Res., 39(9), 814-824. https://doi.org/10.1016/j.cemconres.2009.05.013
  24. Tang, L. and Joost, G. (2007), "On the mathematics of time-dependent apparent chloride diffusion coefficient in concrete", Cement Concrete Res., 37(4), 589-595. https://doi.org/10.1016/j.cemconres.2007.01.006
  25. Tang, L. and Nilsson, L.O. (1992), "Rapid determination of the chloride diffusivity in concrete by applying an electrical field", ACI Mater. J., 89(1), 49-53.
  26. Thomas, M.D.A. and Bamforth, P.B. (1999), "Modeling chloride diffusion in concrete: Effect of fly ash and slag", Cement Concrete Res., 29(4), 487-495. https://doi.org/10.1016/S0008-8846(98)00192-6
  27. Thomas, M.D.A. and Bentz, E.C. (2002), Computer Program for Predicting the Service Life and Life-Cycle Costs of Reinforced Concrete Exposed to Chlorides, Life365 Manual, SFA, 12-56.
  28. Tsao, W.H., Huang, N.M. and Liang, M.T. (2015), "Modelling of chloride diffusion in saturated concrete", Comput. Concrete, 15(1), 127-140. https://doi.org/10.12989/cac.2015.15.1.127
  29. Yang, K.H. and Kang, T.H.K. (2011), "Equivalent-strain distribution factor for unbonded tendon stress at ultimate", ACI Struct. J., 108(2), 217-226.
  30. Yang, K.H., Cheon, J.H. and Kwon, S.J. (2017), "Modeling of chloride diffusion in concrete considering wedge-shaped single crack and steady-state condition", Comput. Concrete, 19(2), 211-216. https://doi.org/10.12989/cac.2017.19.2.211
  31. Yang, K.H., Mun, J.H., Cho, M.S. and Kang, T.H.K. (2014), "A stress-strain model for various unconfined concrete in compression", ACI Struct. J., 111(4), 819-826.
  32. Ye, H., Fu, C., Jin, N. and Jin, X. (2015), "Influence of flexural loading on chloride ingress in concrete subjected to cyclic drying-wetting condition", Comput. Concrete, 15(2), 183-198. https://doi.org/10.12989/cac.2015.15.2.183
  33. Yoo, S.Y. and Kwon, S.J. (2016), "Effects of cold joint and loading conditions on chloride diffusion in concrete containing GGBFS", Constr. Build. Mater., 115(2016), 247-255. https://doi.org/10.1016/j.conbuildmat.2016.04.010

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