Combined effect of carbonation and chloride ingress in concrete

Xingji Zhu; Goangseup Zi; Zhifeng Cao; Xudong Cheng

doi:10.1016/j.conbuildmat.2016.02.034

Combined effect of carbonation and chloride ingress in concrete

Xingji Zhu, Goangseup Zi, Zhifeng Cao, Xudong Cheng

Research output: Contribution to journal › Article › peer-review

62 Citations (Scopus)

Abstract

The combined effect of carbonation and chloride ingress in concrete is studied in this paper. Based on the change of the pore structure and the chemical equilibrium, a comprehensive model is proposed for this problem. A coupled simulation of the transports of carbon dioxide, chloride ions, heat and moisture is carried out. Several sets of experimental data were compared with the prediction by the numerical model developed in this paper, for its verification. Parametric study shows that the differences between the combined mechanism and the independent mechanisms are significant in many aspects.

Original language	English
Pages (from-to)	369-380
Number of pages	12
Journal	Construction and Building Materials
Volume	110
DOIs	https://doi.org/10.1016/j.conbuildmat.2016.02.034
Publication status	Published - 2016 May 1

Keywords

Carbonation of concrete
Chloride penetration
Combined action
Depassivation of reinforcement
Numerical modeling
Pore structure change

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
Materials Science(all)

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AU - Zhu, Xingji

AU - Zi, Goangseup

AU - Cao, Zhifeng

AU - Cheng, Xudong

PY - 2016/5/1

Y1 - 2016/5/1

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AB - The combined effect of carbonation and chloride ingress in concrete is studied in this paper. Based on the change of the pore structure and the chemical equilibrium, a comprehensive model is proposed for this problem. A coupled simulation of the transports of carbon dioxide, chloride ions, heat and moisture is carried out. Several sets of experimental data were compared with the prediction by the numerical model developed in this paper, for its verification. Parametric study shows that the differences between the combined mechanism and the independent mechanisms are significant in many aspects.

KW - Carbonation of concrete

KW - Chloride penetration

KW - Combined action

KW - Depassivation of reinforcement

KW - Numerical modeling

KW - Pore structure change

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