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10.3390/ma15165611
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Article

Time and Crack Width Dependent Model of Chloride Transportation in Engineered Cementitious Composites (ECC)

by
Linglai Bu
1,
Lei Qiao
2,
Renjuan Sun
1,*,
Wei Lu
1,
Yanhua Guan
1,*,
Nan Gao
3,
Xinlei Hu
4,
Zhenhuan Li
1,
Lin Wang
1,
Yuhe Tian
1 and
Yu Qin
1
1
School of Qilu Transportation, Shandong University, Jinan 250002, China
2
Shandong High-Speed Engineering Construction Group Co., Ltd., Jinan 250014, China
3
Jining Construction Project Quality and Safety Technology Center, Jining 272000, China
4
Chongqing Luneng Development (Group) Co., Ltd., Chongqing 404100, China
*
Authors to whom correspondence should be addressed.
Materials 2022, 15(16), 5611; https://doi.org/10.3390/ma15165611
Submission received: 26 May 2022 / Revised: 10 August 2022 / Accepted: 11 August 2022 / Published: 16 August 2022
(This article belongs to the Special Issue Multifunctional Cementitious Composites: Manufacturing and Characterization)
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Abstract

This paper aims to develop a chloride transport model of engineered cementitious composites (ECC) that can consider the influence of both exposure time and crack width. ECC specimens with crack widths of 0.1 mm, 0.2 mm and 0.3 mm were soaked into NaCl solution with periods of 30, 60, 90 and 120 days. The free chloride content profile was measured and used for the development of the transport model. Regression analysis was applied to build the time and crack width dependent models of apparent diffusion coefficient and surface chloride content. The results show that the crack width has significant influence on the free chloride concentration profile when it is above 0.2 mm and the time-dependent constant n decreases linearly with the crack width. The chloride transport model was obtained by subscribing the models of apparent diffusion coefficient and surface chloride content into the analytical solution of Fick’s second law. The model was further validated with the experimental results, showing a deviation within 20%. The findings of the presented study can enhance the current understanding on the chloride transportation in ECC.
Keywords: engineered cementitious composites; surface chloride concentration; apparent chloride ion diffusion coefficient; crack width engineered cementitious composites; surface chloride concentration; apparent chloride ion diffusion coefficient; crack width

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MDPI and ACS Style

Bu, L.; Qiao, L.; Sun, R.; Lu, W.; Guan, Y.; Gao, N.; Hu, X.; Li, Z.; Wang, L.; Tian, Y.; et al. Time and Crack Width Dependent Model of Chloride Transportation in Engineered Cementitious Composites (ECC). Materials 2022, 15, 5611. https://doi.org/10.3390/ma15165611

AMA Style

Bu L, Qiao L, Sun R, Lu W, Guan Y, Gao N, Hu X, Li Z, Wang L, Tian Y, et al. Time and Crack Width Dependent Model of Chloride Transportation in Engineered Cementitious Composites (ECC). Materials. 2022; 15(16):5611. https://doi.org/10.3390/ma15165611

Chicago/Turabian Style

Bu, Linglai, Lei Qiao, Renjuan Sun, Wei Lu, Yanhua Guan, Nan Gao, Xinlei Hu, Zhenhuan Li, Lin Wang, Yuhe Tian, and et al. 2022. "Time and Crack Width Dependent Model of Chloride Transportation in Engineered Cementitious Composites (ECC)" Materials 15, no. 16: 5611. https://doi.org/10.3390/ma15165611

APA Style

Bu, L., Qiao, L., Sun, R., Lu, W., Guan, Y., Gao, N., Hu, X., Li, Z., Wang, L., Tian, Y., & Qin, Y. (2022). Time and Crack Width Dependent Model of Chloride Transportation in Engineered Cementitious Composites (ECC). Materials, 15(16), 5611. https://doi.org/10.3390/ma15165611

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