Model for the Patterns of Salt-Spray-Induced Chloride Corrosion in Concretes under Coupling Action of Cyclic Loading and Salt Spray Corrosion
In this study, the patterns of chloride ion erosion of unsaturated concrete subjected to the coupling action of cyclic loading and salt spray corrosion were experimentally studied, and Fick’s Second Law was used to fit the variation patterns of chloride concentration to obtain the chloride...
Main Authors: | , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2019-02-01
|
Series: | Processes |
Subjects: | |
Online Access: | https://www.mdpi.com/2227-9717/7/2/84 |
id |
doaj-c14118e6f17244c1a60962f8ce349627 |
---|---|
record_format |
Article |
spelling |
doaj-c14118e6f17244c1a60962f8ce3496272020-11-25T01:30:56ZengMDPI AGProcesses2227-97172019-02-01728410.3390/pr7020084pr7020084Model for the Patterns of Salt-Spray-Induced Chloride Corrosion in Concretes under Coupling Action of Cyclic Loading and Salt Spray CorrosionRuixue Liu0Huiguang Yin1Lianying Zhang2Bing Li3Xianbiao Mao4State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaSchool of Civil Engineering, Xuzhou Institute of Technology, Xuzhou 221008, ChinaSchool of Civil Engineering, Xuzhou Institute of Technology, Xuzhou 221008, ChinaSchool of Civil Engineering, Xuzhou Institute of Technology, Xuzhou 221008, ChinaState Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaIn this study, the patterns of chloride ion erosion of unsaturated concrete subjected to the coupling action of cyclic loading and salt spray corrosion were experimentally studied, and Fick’s Second Law was used to fit the variation patterns of chloride concentration to obtain the chloride diffusion coefficient. Accordingly, we have established a mathematical model that describes chloride transport in unsaturated concrete and accounts for the effects of gas flow, water migration, convection diffusion, and capillary action. This model is composed of three equations—the gas flow equation, the solution flow equation, and the solute convection⁻diffusion equation. The COMSOL numerical analysis software was subsequently used to obtain solutions for this model, based on parameters such as porosity and the chloride diffusion coefficient. Subsequently, the saturation, relative permeability, and the chloride ion concentration during the first corrosion cycle were analyzed. The numerical results were consistent with the experimental values and were therefore superior to the values obtained using Fick’s Second Law.https://www.mdpi.com/2227-9717/7/2/84Unsaturationchlorideconcretecoupling modelnumerical calculation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Ruixue Liu Huiguang Yin Lianying Zhang Bing Li Xianbiao Mao |
spellingShingle |
Ruixue Liu Huiguang Yin Lianying Zhang Bing Li Xianbiao Mao Model for the Patterns of Salt-Spray-Induced Chloride Corrosion in Concretes under Coupling Action of Cyclic Loading and Salt Spray Corrosion Processes Unsaturation chloride concrete coupling model numerical calculation |
author_facet |
Ruixue Liu Huiguang Yin Lianying Zhang Bing Li Xianbiao Mao |
author_sort |
Ruixue Liu |
title |
Model for the Patterns of Salt-Spray-Induced Chloride Corrosion in Concretes under Coupling Action of Cyclic Loading and Salt Spray Corrosion |
title_short |
Model for the Patterns of Salt-Spray-Induced Chloride Corrosion in Concretes under Coupling Action of Cyclic Loading and Salt Spray Corrosion |
title_full |
Model for the Patterns of Salt-Spray-Induced Chloride Corrosion in Concretes under Coupling Action of Cyclic Loading and Salt Spray Corrosion |
title_fullStr |
Model for the Patterns of Salt-Spray-Induced Chloride Corrosion in Concretes under Coupling Action of Cyclic Loading and Salt Spray Corrosion |
title_full_unstemmed |
Model for the Patterns of Salt-Spray-Induced Chloride Corrosion in Concretes under Coupling Action of Cyclic Loading and Salt Spray Corrosion |
title_sort |
model for the patterns of salt-spray-induced chloride corrosion in concretes under coupling action of cyclic loading and salt spray corrosion |
publisher |
MDPI AG |
series |
Processes |
issn |
2227-9717 |
publishDate |
2019-02-01 |
description |
In this study, the patterns of chloride ion erosion of unsaturated concrete subjected to the coupling action of cyclic loading and salt spray corrosion were experimentally studied, and Fick’s Second Law was used to fit the variation patterns of chloride concentration to obtain the chloride diffusion coefficient. Accordingly, we have established a mathematical model that describes chloride transport in unsaturated concrete and accounts for the effects of gas flow, water migration, convection diffusion, and capillary action. This model is composed of three equations—the gas flow equation, the solution flow equation, and the solute convection⁻diffusion equation. The COMSOL numerical analysis software was subsequently used to obtain solutions for this model, based on parameters such as porosity and the chloride diffusion coefficient. Subsequently, the saturation, relative permeability, and the chloride ion concentration during the first corrosion cycle were analyzed. The numerical results were consistent with the experimental values and were therefore superior to the values obtained using Fick’s Second Law. |
topic |
Unsaturation chloride concrete coupling model numerical calculation |
url |
https://www.mdpi.com/2227-9717/7/2/84 |
work_keys_str_mv |
AT ruixueliu modelforthepatternsofsaltsprayinducedchloridecorrosioninconcretesundercouplingactionofcyclicloadingandsaltspraycorrosion AT huiguangyin modelforthepatternsofsaltsprayinducedchloridecorrosioninconcretesundercouplingactionofcyclicloadingandsaltspraycorrosion AT lianyingzhang modelforthepatternsofsaltsprayinducedchloridecorrosioninconcretesundercouplingactionofcyclicloadingandsaltspraycorrosion AT bingli modelforthepatternsofsaltsprayinducedchloridecorrosioninconcretesundercouplingactionofcyclicloadingandsaltspraycorrosion AT xianbiaomao modelforthepatternsofsaltsprayinducedchloridecorrosioninconcretesundercouplingactionofcyclicloadingandsaltspraycorrosion |
_version_ |
1725088837339709440 |