Chloride Penetration in Nonsaturated Concrete

Ababneh, Ayman; Benboudjema, Farid; Xi, Yunping

doi:10.1061/(asce)0899-1561(2003)15:2(183)

Cited by 199 publications

(79 citation statements)

References 14 publications

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“…Experimental results found in [1] indicate that the transport of moisture and chloride ions are cross-coupled in the pure cement matrix. Based on these results, a "quasi-linear" constitutive model was proposed by them as follows:…”

Section: Diffusion Properties Of the Cement Pastementioning

confidence: 89%

Macroscopic diffusivity in concrete determined by computational homogenization

Nilenius

Larsson

Lundgren

et al. 2012

Num Anal Meth Geomechanics

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Effective moisture and chloride ion diffusivity coefficients for concrete are determined by computational homogenization, where concrete is modelled on the mesoscale as a heterogenous three-phase composite material. By imposing moisture and chloride ion gradients on a Representative Volume Element (RVE), effective macroscale properties are obtained through finite element analysis. A parametric study of the effects of the aggregate content was carried out. The numerical results correspond well with an estimate of the Hashin-Shtrikman type, available in the literature. The computational homogenization strategy proposed here also includes the Interfacial Transition Zone (ITZ), and its influence on the effective diffusivity coefficients is assessed.

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Section: Diffusion Properties Of the Cement Pastementioning

confidence: 89%

Macroscopic diffusivity in concrete determined by computational homogenization

Nilenius

Larsson

Lundgren

et al. 2012

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

show abstract

“…Due to the fact that chloride ion only can diffuse in pore solution, there are two reasons causing cl decrease when Θ decreased: (1) the area used for transmission is reduced; (2) the transmission path for chloride ion becomes longer because part of the pore is not connected. The influence of Θ has been investigated by several researchers [21][22][23][24]. The chloride ion diffusion coefficient decreased as concrete age increased because of the continuous hydration of the binders.…”

Section: Chloride Transmission Model In W-d Cycle Environmentmentioning

confidence: 99%

Impact of Cyclic Loading on Chloride Diffusivity and Mechanical Performance of RC Beams under Seawater Corrosion

Pang

Diao

et al. 2017

Advances in Materials Science and Engineering

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An experimental study was conducted to investigate the impact of cyclic loading on the mechanical performance and chloride diffusivity of RC beams exposed to seawater wet-dry cycles. To induce initial damage to RC beam specimen, cyclic loading controlled by max load and cycles was applied. Then beam specimens underwent 240 wet-dry cycles of seawater. Results show that the chloride content increased as max load and cycle increased. The chloride content at steel surface increased approximatively linearly as average crack width increased. Moreover, the max load had more influence on chloride content at steel surface than cycle. The difference of average chloride diffusion coefficient between tension and compression concrete was little at uncracked position. Average chloride diffusion coefficient increased as crack width increased when crack width was less than 0.11 mm whereas the increasing tendency was weak when crack width exceeded 0.11 mm. The residual yield load and ultimate load of RC beams decreased as max load and cycle increased. Based on univariate analysis of variance, the max load had more adverse effect on yield load and ultimate load than cycle.

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“…For unsaturated concrete, the di usion coe cient a ected by relative humidity is determined as follows [21,22]:…”

Section: Eoretical Background About Chloride Migration Modelmentioning

confidence: 99%

Experimental and Simulation Study on Diffusion Behavior of Chloride Ion in Cracking Concrete and Reinforcement Corrosion

Cheng

Zhang

et al. 2018

Advances in Materials Science and Engineering

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A chloride ion is a key factor affecting durability of reinforced concrete (RC) structures. In order to investigate chloride migration in cracked concrete, considering the mesoscopic heterogeneity of concrete, concrete modeled here is treated as a four-phase composite consisting aggregate, mortar, crack, and interfacial transition zone (ITZ). In this paper, two-dimensional finite element models of cracked concrete with different crack widths and crack quantity are established and the control parameters are determined based on the nonsteady-state chloride migration (NSSCM) test. In addition, based on the concrete finite element models, influences of crack width, crack quantity, and erosion time on chloride migration behaviors and characteristics are studied. Furthermore, a prediction model of chloride concentration on the simulated surface of a rebar in concrete influenced by different crack states is established. is model is used to derive the corrosion current density and corrosion depth prediction models of a rebar in this paper, which can be used by engineers to estimate the migration behaviors of chloride and rebar corrosion degree in RC structures in a short time and evaluate the duration of RC structures after knowing the status of cracks and chloride diffusion sources.

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Chloride Penetration in Nonsaturated Concrete

Cited by 199 publications

References 14 publications

Macroscopic diffusivity in concrete determined by computational homogenization

Macroscopic diffusivity in concrete determined by computational homogenization

Impact of Cyclic Loading on Chloride Diffusivity and Mechanical Performance of RC Beams under Seawater Corrosion

Experimental and Simulation Study on Diffusion Behavior of Chloride Ion in Cracking Concrete and Reinforcement Corrosion

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