Computers and Concrete

  • 제17권1호
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  • Pages.53-66
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  • 2016
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Chloride diffusion in concrete associated with single, dual and multi cation types

  • Song, Zijian (College of Mechanics and Materials, Hohai University) ;
  • Jiang, Linhua (College of Mechanics and Materials, Hohai University) ;
  • Zhang, Ziming (College of Mechanics and Materials, Hohai University)
  • 투고 : 2015.04.14
  • 심사 : 2016.01.07
  • 발행 : 2016.01.25
⟨ 이전 논문 다음 논문 ⟩

초록

Currently, most of the investigations on chloride diffusion were based on the experiments and simulations concerning single cation type chlorides. Chloride diffusion associated with dual or multi cation types was rarely studied. In this paper, several groups of diffusion experiments are conducted using chloride solutions containing single, dual and multi cation types. A multi-ionic model is also proposed to simulate the chloride diffusion behavior in the experimental tests. The MATLAB software is used to numerically solve the nonlinear PDEs in the multi-ionic model. The experimental and simulated results show that the chloride diffusion behavior associated with different cation types is significantly different. When the single cation type chlorides are adopted, it is found that the bound rates of chloride ions combined with divalent cations are greater than those combined with monovalent cations. When the dual/multi cation type chlorides are adopted, the chloride bound rates increase with the $Ca^{2+}/Mg^{2+}$ percentage in the source solutions. This evidence indicates that the divalent cations would markedly enhance the chloride binding capacity and reduce the chloride diffusivity. Moreover, on the basis of the analysis, it is also found that the complicated cation types in source solutions are beneficial to reducing the chloride diffusivity.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China

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피인용 문헌

  1. Simple Technique for Tracking Chloride Penetration in Concrete Based on the Crack Shape and Width under Steady-State Conditions vol.9, pp.2, 2017, https://doi.org/10.3390/su9020282
  2. Modeling of chloride diffusion in concrete considering wedge-shaped single crack and steady-state condition vol.19, pp.2, 2017, https://doi.org/10.12989/cac.2017.19.2.211
  3. A study on effects of water-cement ratio and crack width on chloride ion transmission rate in concrete vol.19, pp.4, 2016, https://doi.org/10.12989/cac.2017.19.4.387
  4. Neuro-fuzzy model of concrete exposed to various regimes combined with De-icing salts vol.21, pp.6, 2016, https://doi.org/10.12989/cac.2018.21.6.649