Computers and Concrete

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Study on moisture transport in concrete in atmospheric environment

  • Zhang, Weiping (Department of Structural Engineering, Tongji University) ;
  • Tong, Fei (Department of Structural Engineering, Tongji University) ;
  • Gu, Xianglin (Department of Structural Engineering, Tongji University) ;
  • Xi, Yunping (Department of Structural Engineering, Tongji University)
  • Received : 2015.03.02
  • Accepted : 2015.11.12
  • Published : 2015.11.25
⟨ Previous Next ⟩

Abstract

Moisture transport in concrete in atmospheric environment was studied in this paper. Based on the simplified formula of the thickness of the adsorbed layer, the pore-size distribution function of cement paste was calculated utilizing the water adsorption isotherms. Taking into consideration of the hysteresis effect in cement paste, the moisture diffusivity of cement paste was obtained by the integration of the pore-size distribution. Concrete is regarded as a two-phase composite with cement paste and aggregate, neglecting the moisture diffusivity of aggregate, then moisture diffusivity of concrete was evaluated using the composite theory. Finally, numerical simulation of humidity response during both wetting and drying process was carried out by the finite difference method of partial differential equation for moisture transport, and the numerical results well capture the trend of the measured data.

Keywords

References

  1. Ababneh, A., Benboudjema, F. and Xi, Y.P. (2003), "Chloride penetration in nonsaturated concrete", J. Mater. Civ. Eng., 15(2), 183-191. https://doi.org/10.1061/(ASCE)0899-1561(2003)15:2(183)
  2. Barrett, E.P., Joyner, L.G. and Halenda, P.P. (1951), "The determination of pore volume and area distributions in porous substances. I. computations from nitrogen isotherms", J. Am. Chem. Soc, 73(1), 373-380. https://doi.org/10.1021/ja01145a126
  3. Bazant, Z.P. and Najjar, L.J. (1972), "Nonlinear water diffusion in nonsaturated concrete", Mater. Struct., 5(1), 3-20.
  4. Brunauer, S., Emmett, P.H. and Teller, E. (1938), "Adsorption of gases in multimolecular layers", J. Am. Chem. Soc, 60(2), 309-319. https://doi.org/10.1021/ja01269a023
  5. Brunauer, S., Skalny, J. and Bodor, E.E. (1969), "Adsorption on nonporous solids", J. Colloid Interface Sci., 30(4), 546-552. https://doi.org/10.1016/0021-9797(69)90423-8
  6. Cranston, R.W. and Inkley, F.A. (1957), "The determination of pore structures from nitrogen adsorption isotherms", Advan. Catal., 9, 143-154.
  7. Daian, J.F. (1988), "Condensation and isothermal water transfer in cement mortar, part I - pore size distribution, equilibrium water condensation and imbibition", Trans. Porous Media, 3(6), 563-589. https://doi.org/10.1007/BF00959103
  8. Daian, J.F. (1989), "Condensation and isothermal water transfer in cement mortar, part II - transient condensation of water vapor", Trans. Porous Media, 4(1), 1-16. https://doi.org/10.1007/BF00134739
  9. Eskandari-Ghadi, M., Zhang, W.P., Xi, Y.P. and Stein, S. (2013), "Modeling of moisture diffusivity of concrete at low temperatures", J. Eng. Mech., 139(7), 903-915. https://doi.org/10.1061/(ASCE)EM.1943-7889.0000432
  10. Garrabrants, A.C. and Kosson, D.S. (2003), "Modeling moisture transport from a Portland cement-based material during storage in reactive and inert atmospheres", Dry. Technol., 21(5), 775-805. https://doi.org/10.1081/DRT-120021686
  11. Gawin, D., Majorana, C.E. and Schrefler, B.A. (1999), "Numerical analysis of hygro-thermal behavior and damage of concrete at high temperature", Mech. Cohes.-Frict.Mater., 4(1), 37-74. https://doi.org/10.1002/(SICI)1099-1484(199901)4:1<37::AID-CFM58>3.0.CO;2-S
  12. Guo, B.H. (2013), "Carbonation model of concrete considering coupling transfer of heat and moisture", Master Disserration, Tongji University, Shanghai. (in Chinese)
  13. Hall, C. and Hoff, W.D. (2012), Water transport in brick, stone and concrete, 2nd Edition, CRC Press, Boca Raton, FL., USA.
  14. Hillerborg, A. (1985), "A modified absorption theory", Cement Concrete Res., 15(5), 809-816. https://doi.org/10.1016/0008-8846(85)90147-4
  15. 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
  16. Kondo, S., Ishikawa, T. and Abe, I. (2005), Adsorption science, 2nd Edition, Translated by Li, G.X., Chemical Industry Press, Beijing. (in Chinese)
  17. Leech, C., Lockington, D. and Dux, P. (2003), "Unsaturated diffusivity functions for concrete derived from NMR images", Mater. Struct., 36(6), 413-418. https://doi.org/10.1007/BF02481067
  18. Li, C.Q. and Li, K.F. (2010), "Moisture transport in concrete cover under drying-wetting cycles: theory, experiment and modeling", J. Chin. Ceram. Soc., 38(7), 1151-1159. (in Chinese)
  19. Li, C.Q. (2009), "Study on water and ionic transport processes in cover concrete under drying-wetting cycles", Ph.D. Dissertation, Tsinghua University, Beijing. (in Chinese)
  20. Maekawa, K., Ishida, T. and Kishi, T. (2009), Multi-scale modeling of structural concrete, Taylor & Francis, London and New York.
  21. Quenard, D. and Sallee, H. (1992), "Water vapour adsorption and transfer in cement-based materials: a network simulation", Mater. Struct., 25(9), 515-522. https://doi.org/10.1007/BF02472447
  22. Rose, D.A. (1963), "Water movement in porous materials: part 2 - the separation of the components of water movement", Brit. J. Appl. Phys., 14(8), 491-496. https://doi.org/10.1088/0508-3443/14/8/310
  23. Sakata, K. (1983), "A study on moisture diffusion in drying and drying shrinkage of concrete", Cem. Concr. Res., 13(2), 216-224. https://doi.org/10.1016/0008-8846(83)90104-7
  24. Shen, C.H. (2007), "Researches on the moisture transport of cement-based materials", Ph.D. Dissertation, Wuhan University of Technology, Wuhan. (in Chinese)
  25. Siegesmund, S. (2011), Stone in architecture: properties, durability, 4th Edition, Springer-Verlag Berlin Heidelberg, Berlin, Germany.
  26. Ramachandran, V.S. and Feldman, R.F. (1984), Concrete admixture handbook-properties, science, and technology, 2nd Edition, Noyes Publication, Park Ridge, NJ, USA.
  27. Welty, J.R., Wicks, C.E., Wilson, R.E. and Rorrer, G.L. (2009), Fundamentals of momentum, heat, and mass transfer, 5th Edition, John Wiley &Sons, Inc, Hoboken, NJ, USA.
  28. Winkler, E.M. (1994), Stone in architecture: properties, durability, Springer-Verlag, Berlin, Germany.
  29. Xi, Y.P., Bazant, Z.P. and Jennings, H.M. (1994a), "Moisture diffusion in cementitious materials moisture capacity and diffusivity", Adv. Cem. Based Mater., 1(6), 258-266. https://doi.org/10.1016/1065-7355(94)90034-5
  30. Xi, Y.P., Bazant, Z.P. and Jennings, H.M. (1994b), "Moisture diffusion in cementitious materials moisture adsorption isotherms", Adv. Cem. Based Mater., 1(6), 248-257. https://doi.org/10.1016/1065-7355(94)90033-7
  31. Zhang, Q.Z. (2012), "Study on similarity of accelerated corrosion tests for concrete in tidal zone", Ph.D. Dissertation, Tongji University, Shanghai. (in Chinese)
  32. Zhang, Q.Z., Gu, X.L., Zhang, W.P. and Huang, Q.H. (2012), "Model on capillary pressure-saturation relationship for concrete", J. Tongji Univ.: Nat. Sci. Ed., 40(12), 1753-1759. (in Chinese)

Cited by

  1. A simple practical method for determination of moisture transfer coefficient of mature concrete using a combined experimental-numerical approach vol.18, pp.3, 2016, https://doi.org/10.12989/cac.2016.18.3.367
  2. Localisation of embedded water drop in glass composite using THz spectroscopy vol.21, pp.6, 2018, https://doi.org/10.12989/sss.2018.21.6.751
  3. An experimental and numerical study on long-term deformation of SRC columns vol.22, pp.3, 2015, https://doi.org/10.12989/cac.2018.22.3.261
  4. Determination of the diffusion coefficient and the hydraulic conductivity of porous media based on embedded humidity sensors vol.263, pp.None, 2020, https://doi.org/10.1016/j.conbuildmat.2020.120092
  5. Research on Cracking Mechanism of Early-Age Restrained Concrete under High-Temperature and Low-Humidity Environment vol.14, pp.15, 2021, https://doi.org/10.3390/ma14154084