Modeling chloride diffusion in concrete with a linear increase of surface chloride

Zhou, Shengjun

doi:10.14359/51687160

Cited by 4 publications

(6 citation statements)

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“…where C -chloride concentration in concrete at depth x and exposure time t; D -chloride diffusion coefficient. The mathematical solution to Eqn (1) for a semiinfinite concrete with a constant surface concentration C s , chloride diffusion coefficient D, an initial chloride concentration C 0 , and the depth of convection zone Δx was provided by Fib Bulletin 34 (2006), as shown in Eqn (2) (Meira et al 2010;Zhou 2014…”

Section: Chloride Diffusion Modelmentioning

confidence: 99%

“…The surface chloride concentration C s is not constant in many cases but has a surface chloride building-up process, which has been observed mostly in two patterns. The first one is a linear pattern of surface chloride buildup (Mustafa, Yusof 1994;Costa, Appleton 1999;Meira et al 2010;Zhou 2014), especially for the concrete exposed to airborne chloride, deicing salt and spray conditions. The second one is a square root build-up (Shin, Kim 2002;Kato et al 2005), especially for the wet and dry cycles condition.…”

Section: Chloride Diffusion Modelmentioning

confidence: 99%

“…For the linear pattern of surface chloride build-up, the relationship between C s and exposure time t can be expressed as (Zhou 2014…”

Section: Chloride Diffusion Modelmentioning

confidence: 99%

“…To consider an initial chloride concentration C 0 , a convection zone depth Δx and a decreasing chloride diffusion coefficient, Eqn (5) can be rewritten to Eqn (6). This process is also called the first period of chloride diffusion, and the length of this period is around 10 years for marine splashing zone, and 15 years or longer for atmosphere in coastal area (Ehlen et al 2009;Ehlen, Kojundic 2014;Zhou 2014).…”

Section: Chloride Diffusion Modelmentioning

confidence: 99%

“…Because the chloride ion penetrates into the internal part of concrete mainly in the manner of diffusion, the chloride diffusion model has been investigated by many researchers (e.g. Zhang, Gjørv 1996;Zhou 2014Zhou , 2016.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Modelling Chloride Diffusion in Concrete With Influence of Concrete Stress State

Wang

et al. 2017

Journal of Civil Engineering and Management

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Under coastal or marine conditions, chloride erosion is the major accelerating factor of reinforcement corrosion. Therefore, it is of vital importance to investigate the chloride diffusion model. Research reveals that the concrete stress state has great influence on chloride diffusion; therefore a stress influence coefficient was incorporated in chloride diffusion coefficient model by many researchers. By referring to the experimental data from eight different researchers, the law between stress influence coefficient and concrete stress ratio is studied in detail, and equations relating the stress influence coefficient with the concrete stress ratio are established. Compared with three typical existing groups of equations, it is found that the proposed equations give the most accurate estim.ation of the stress influence coefficient. Hence, the proposed equations can be adopted to improve the valuation of chloride diffusion coefficient, and a modified chloride diffusion model is put forward. Three groups of experimental data are used to validate the modified chloride diffusion model, which is shown to be reasonable and having high prediction accuracy.

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Section: Chloride Diffusion Modelmentioning

confidence: 99%