Experimental Study on the AC Impedance Characteristics of Green Carbonated Concrete

DOI

10.2991/978-94-6463-658-1_43How to use a DOI?

Keywords

Green concrete; Carbonation curing; AC impedance; Microstructure

Abstract

Early carbonation curing of cement-based materials is an effective method for sequestering carbon dioxide and enhancing the properties of hydration products. Understanding the microstructural changes during the early carbonation-hydration process of cement provides valuable insights into its mechanical properties. This study employed AC impedance technology to characterize the electrochemical behavior of cement paste specimens with varying water-to-cement ratios and sizes. By fitting Nyquist plots using an equivalent circuit model, the microstructural evolution of the cement matrix was thoroughly explored, revealing the mechanisms of carbonation and hydration. The results indicate that with increased carbonation-curing age, the semicircle diameter in the high-frequency region of the Nyquist plot increases, while the slope of the line in the low-frequency region decreases. An increase in the water-to-cement ratio slightly increases impedance; smaller specimen sizes exhibit higher reactivity, faster charge transfer, and larger arc radii in the impedance spectrum.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Jianen Qiao
AU  - Shijun Wang
AU  - Wenyuan Bai
AU  - Lu Lin
AU  - Jiangtao Huang
PY  - 2025
DA  - 2025/03/03
TI  - Experimental Study on the AC Impedance Characteristics of Green Carbonated Concrete
BT  - Proceedings of the 2024 10th International Conference on Architectural, Civil and Hydraulic Engineering (ICACHE 2024)
PB  - Atlantis Press
SP  - 429
EP  - 435
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-658-1_43
DO  - 10.2991/978-94-6463-658-1_43
ID  - Qiao2025
ER  -