Computers and Concrete

  • 제4권4호
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  • Pages.273-284
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  • 2007
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Mechanisms of sulfate ionic diffusion in porous cement based composites

  • Gospodinov, P. (Institute of Mechanics, Bulgarian Academy of Sciences) ;
  • Mironova, M. (Central Laboratory of Physico-Chemical Mechanics, Bulgarian Academy of Sciences) ;
  • Kazandjiev, R. (Institute of Mechanics, Bulgarian Academy of Sciences)
  • 투고 : 2006.07.06
  • 심사 : 2007.08.08
  • 발행 : 2007.08.25
⟨ 이전 논문 다음 논문 ⟩

초록

The paper considers a theoretical model for the study of the process of transfer of sulfate ions in saturated porous media - mineral composites. In its turn, the model treats diffusion of sulfate ions into cement based composites, accounting for simultaneous effects such as filling of micro-capillaries with ions and chemical products and liquid push out of them. The proposed numerical algorithm enables one to account for those simultaneous effects, as well as to model the diffusive behavior of separate sections of the considered volume, such as inert fillers. The cases studied illustrate the capabilities of the proposed model and those of the algorithm developed to study diffusion, considering the specimen complex configuration. Computations show that the theoretical assumptions enable one to qualitatively estimate the experimental evidence and the capabilities of the studied composite. The results found can be used to both assess the sulfate corrosion in saturated systems and predict and estimate damage of structures built of cement-based mineral composites.

키워드

참고문헌

  1. Gospodinov, P. (2005), "Numerical simulation of 3D sulfate ion diffusion and liquid push out of the material capillaries in cement composites", Cement Concrete Res., 35(3), 520-526. https://doi.org/10.1016/j.cemconres.2004.07.005
  2. Gospodinov, P., Kazandjiev, R., Partalin, T. and Mironova, M. (1999), "Diffusion of sulfate ions into cement stone regarding simultaneous chemical reactions and resulting effects", Cement Concrete Res., 29(10), 1591-1596. https://doi.org/10.1016/S0008-8846(99)00138-6
  3. Kazandjiev, R., Gospodinov, P. and Mironova, M. (2005), "Assessment of the mechanical characteristics of cement stone subjected to sulfate attack of various intensity", Proceedings of the 10-th Nat. Congress on Theor. and Appl. Mechanics, Varna 2005, 1, 236-240.
  4. Marchand, J., Samson, E. and Maltais, Y. (2001), "Modeling ionic diffusion mechanisms in saturated cement-based materials - an overview", Material Science of Concrete - Ion and Mass Transport in Cement-Based Materials, American Ceram. Society (USA), D. Hooton et al. eds., 97-111.
  5. Marchand, J., Samson, E. and Beaudoin J. J. (2002), "Modeling ion transport mechanisms in unsaturated porous media", Encyclopedia of Surface and Coloid Science, New York, USA, M. Dekker.
  6. Mironova, M., Gospodinov, P. and Kazandjiev, R. (2002), "The effect of liquid push out of the material capillaries under sulfate ion diffusion in cement composites", Cement Concrete Res., 32(1), 9-15. https://doi.org/10.1016/S0008-8846(01)00621-4
  7. Samson, E., Lemaire, G., Marchand, J. and Beaudoin, J. J. (1999a), "Modeling chemical activity effects in strong ionic solutions", Comput. Mater. Sci., 15, 285-294. https://doi.org/10.1016/S0927-0256(99)00017-8
  8. Samson E. and Marchand J. (1999), "Numerical solution of the extended Nernst-Planck model", J. Colloid Interface Sci., 215, 1-8. https://doi.org/10.1006/jcis.1999.6145
  9. Samson, E., Marchand, J. and Beaudoin, J. J. (1999b), "Describing ion diffusion mechanisms in cement-based materials using the homogenization technique", Cement Concrete Res., 29(10), 1341-1345. https://doi.org/10.1016/S0008-8846(99)00101-5
  10. Samson, E., Marchand, J., Robert, J.-L. and Bournazel, J.-P., (1999c), "Modelling ion diffusion mechanisms in porous media", Int. J. Numer. Mech. Eng. 46, 2043-2060. https://doi.org/10.1002/(SICI)1097-0207(19991230)46:12<2043::AID-NME795>3.0.CO;2-7
  11. Stanish, K., Hooton, R.D. and Thomas, M. D. A. (2004), "A novel method for describing chloride ion transport due to an electrical gradient in concrete: Part 1. Theoretical description", Cement Concrete Res. 34(1), 43-49. https://doi.org/10.1016/S0008-8846(03)00191-1

피인용 문헌

  1. Modeling of damage in cement paste subject to external sulfate attack vol.16, pp.6, 2015, https://doi.org/10.12989/cac.2015.16.6.847
  2. Numerical investigation of the external sulfate attack induced expansion response of cement paste by using crystallization pressure vol.27, pp.2, 2019, https://doi.org/10.1088/1361-651X/aaf76a
  3. Multiscale Numerical Simulation of Expansion Response of Hardened Cement Paste at Dormant Period of External Sulfate Attack vol.145, pp.7, 2007, https://doi.org/10.1061/(asce)em.1943-7889.0001622