Effects of Curing Methods on the Permeability and Mechanism of Cover Concrete

Authors

  • Wang Hao

    Shandong Hi-speed Company Limited, Jinan, Shandong, 250101, China
  • Baolin Guo School of Civil Engineering Dalian University of Technology, Dalian, Liaoning, 116000, China
  • Yongzhi Guo

    Transportation Research Institute of Shandong Province, Jinan, Shandong, 250100, China
  • Ruishuang Jiang

    Transportation Research Institute of Shandong Province, Jinan, Shandong, 250100, China
  • Fangli Zhao School of Civil Engineering Dalian University of Technology, Dalian, Liaoning, 116000, China
  • Baomin Wang

    School of Civil Engineering Dalian University of Technology, Dalian, Liaoning, 116000, China

DOI:

https://doi.org/10.30564/jbms.v5i1.5484
Received: 20 February 2023 | Revised: 20 March 2023 | Accepted: 27 March 2023 | Published Online: 30 March 2023

Abstract

Curing methods are one of the most important factors in determining the quality and compactness of cover concrete. The effect of curing methods on the water absorption and sorptivity coefficient of cover concrete with the substitution ratio of fly ash (FA) and ground granulated blast slag (GGBS) for cement between 30 wt% and 40 wt% was studied by capillary water absorption test. The vacuum saturation test and mercury intrusion test were employed to characterize these differences in the pore structure of cover concrete under different curing methods. With further analysis of the compactness of microstructure by SEM, the mechanism of the impact of curing methods on the permeability of cover concrete was revealed. The results obtained indicate that the effect of curing methods on the water absorption, sorptivity coefficient and porosity of cover concrete shows the trend of natural curing > cover curing > water curing > standard curing. It is also shown that reasonable curing is advantageous to reduce the porosity and permeability of cover concrete. In natural curing conditions, the appearance of porosity increasing and pore structure coarsening is more critical for covering concrete with mineral admixtures than for pure cement concrete. Therefore, the permeability of cover concrete with mineral admixtures is more sensitive to the early-age curing methods.

Keywords:

Curing methods; Cover concrete; Permeability; Capillary water absorption; Porosity

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How to Cite

Hao, W., Guo, B., Guo, Y., Jiang, R., Zhao, F., & Wang, B. (2023). Effects of Curing Methods on the Permeability and Mechanism of Cover Concrete. Journal of Building Material Science, 5(1), 20–31. https://doi.org/10.30564/jbms.v5i1.5484

Issue

Vol. 5 , Iss. 1 (June 2023)

Article Type

Article

License

Copyright © 2023 Hao Wang, Baolin Guo, Yongzhi Guo, Ruishuang Jiang, Fangli Zhao, Baoming Wang

Creative Commons License

This is an open access article under the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) License.

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