Life Prediction of Internal Curing Concrete in Chloride Environment Based on Nernst-Plank Equation

LUO Daming; LI Fan; NIU Ditao

doi:10.13204/j.gyjzG22073005

Volume 52 Issue 10

Oct. 2022

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LUO Daming, LI Fan, NIU Ditao. Life Prediction of Internal Curing Concrete in Chloride Environment Based on Nernst-Plank Equation[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(10): 131-138. doi: 10.13204/j.gyjzG22073005

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LUO Daming, LI Fan, NIU Ditao. Life Prediction of Internal Curing Concrete in Chloride Environment Based on Nernst-Plank Equation[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(10): 131-138. doi: 10.13204/j.gyjzG22073005

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Life Prediction of Internal Curing Concrete in Chloride Environment Based on Nernst-Plank Equation

doi: 10.13204/j.gyjzG22073005

LUO Daming^1,2,
LI Fan^1,2,
NIU Ditao^1,2

1. State Key Laboratory of Green Building in Western China, Xi'an University of Architecture and Technology, Xi'an 710055, China;
2. School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China

Received Date: 2022-07-30
Available Online: 2023-03-22

Abstract

Abstract

Concrete structures in coastal areas, salt lakes, and deicing salt areas are seriously eroded by chloride ions, which has caused great economic losses. Traditional chloride transport models based on Fick's second law fail to consider influencing factors comprehensively and cannot reflect the transport behavior of chloride ions in field engineering. In addition, the chloride transport model based on the Nernst-Plank equation takes into account the synergy of multiple factors, but its equation is difficult to be solved, which thus limits its application in engineering. According to the Nernst-Plank equation, this study analyzed the multi-ion transport model of cement-based materials under erosion and carried out an unsteady state electromigration test of the chlorine ions and a moisture transport test of the concrete. In addition, the study considered the composition of the concrete mixture, the physical and chemical properties of binding materials, and the service environment characteristics of the structure and simulated the chloride transport process in ordinary concrete and internal curing concrete by using the STADIUM^® software. The results show that internal curing can improve the resistance of concrete to ion erosion and prolong the service life of the concrete structures, but the improvement is limited in the later stage. Furthermore, STADIUM^® software can better simulate the transport behavior of chloride ions in concrete, which provides a convenient method for predicting the life of concrete structures.
- Nernst-Plank equation,
- internal curing,
- chloride erosion,
- transport model,
- life prediction

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References(34)

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