Computers and Concrete

  • 제11권3호
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  • Pages.201-222
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  • 2013
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Coupled diffusion of multi-component chemicals in non-saturated concrete

  • 투고 : 2011.05.26
  • 심사 : 2012.02.03
  • 발행 : 2013.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

A comprehensive simulation model for the transport process of fully coupled moisture and multi-species in non-saturated concrete structures is proposed. The governing equations of moisture and ion diffusion are formulated based on Fick's law and the Nernst-Planck equation, respectively. The governing equations are modified by explicitly including the coupling terms corresponding to the coupled mechanisms. The ionic interaction-induced electrostatic potential is described by electroneutrality condition. The model takes into account the two-way coupled effect of moisture diffusion and ion transport in concrete. The coupling parameters are evaluated based on the available experimental data and incorporated in the governing equations. Differing from previous researches, the material parameters related to moisture diffusion and ion transport in concrete are considered not to be constant numbers and characterized by the material models that account for the concrete mix design parameters and age of concrete. Then, the material models are included in the numerical analysis and the governing equations are solved by using finite element method. The numerical results obtained from the present model agree very well with available test data. Thus, the model can predict satisfactorily the ingress of deicing salts into non-saturated concrete.

키워드

과제정보

연구 과제 주관 기관 : University of New Hampshire

참고문헌

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피인용 문헌

  1. The effect of moisture transport on chloride penetration in concrete vol.125, 2016, https://doi.org/10.1016/j.conbuildmat.2016.08.124
  2. Analytical Solutions of Ionic Diffusion and Heat Conduction in Multilayered Porous Media vol.2015, 2015, https://doi.org/10.1155/2015/208914
  3. Flexural strength of notched concrete beam filled with alkali-activated binders under different types of alkali solutions vol.127, 2016, https://doi.org/10.1016/j.conbuildmat.2016.10.053
  4. The effect of temperature variation on chloride penetration in concrete vol.156, 2017, https://doi.org/10.1016/j.conbuildmat.2017.08.139
  5. Modelling of chloride penetration in unsaturated concrete vol.28, pp.1, 2016, https://doi.org/10.1680/adcr.15.00003
  6. A Thermo-Hygro-Coupled Model for Chloride Penetration in Concrete Structures vol.2015, 2015, https://doi.org/10.1155/2015/682940
  7. Numerical simulation of moisture transport in concrete based on a pore size distribution model vol.67, 2015, https://doi.org/10.1016/j.cemconres.2014.08.003
  8. Modeling the effect of temperature gradient on moisture and ionic transport in concrete vol.106, pp.None, 2013, https://doi.org/10.1016/j.cemconcomp.2019.103454
  9. Multi-term time fractional diffusion equations and novel parameter estimation techniques for chloride ions sub-diffusion in reinforced concrete vol.378, pp.2172, 2020, https://doi.org/10.1098/rsta.2019.0538