Preliminary Study on Macro-Cell Corrosion of Steel Bars in Seawater Mixed Concrete with Various Interfacial Transition Zones

DOI

10.2991/978-94-6463-672-7_16How to use a DOI?

Keywords

Interfacial Transition Zones; Macro-cell Corrosion; Half-cell Potential; Depth of Corrosion

Abstract

This study evaluated the corrosion of steel in seawater-mixed concrete with different interfacial transition zones (ITZs) by measuring different corrosion parameters. The ITZs around the steel bars were intentionally varied by applying cement paste coating around the steel bars, which had various water to cement ratios (W/Cs = 0.3, 0.5, and 0.7). Four cases made with slag cement (68% slag) were investigated, including a control case in which no coating was used. To assess macro-cell corrosion current density prism specimens have been made using segmented steel bars. From the casting of the specimens, until they were 30 days old, the current flow was recorded by electrically connecting the segmented steel bars outside the specimens with a data logger. Monitoring of the half-cell potentials throughout steel bars was carried out and measurements of the macro-cell corrosion were completed. Regardless of the specific cases studied, macro-cell corrosion exhibited a consistent trend of decrease. Steel bars having different cement paste coating with low W/Cs improved the ITZs, creating a dense steel-concrete interface that acted as a barrier against chloride ions permeability. However, a cement paste coating with high W/Cs showed more depth of corrosion compared to the control case than the case without coating because of the weak steel-concrete interface.

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.

Download article (PDF)

TY  - CONF
AU  - Tarek Uddin Mohammed
AU  - Md. Aktaruzzaman Rony
AU  - Labiba Amin Parisa
AU  - Maliha Mahjabin
AU  - Mozidun Nahar Lorin
AU  - Md. Zawad Rafid
PY  - 2025
DA  - 2025/04/04
TI  - Preliminary Study on Macro-Cell Corrosion of Steel Bars in Seawater Mixed Concrete with Various Interfacial Transition Zones
BT  - Proceedings of the 1st International Conference on Recent Innovation in Civil Engineering and Architecture for Sustainable Development (IICASD-2024)
PB  - Atlantis Press
SP  - 185
EP  - 198
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-672-7_16
DO  - 10.2991/978-94-6463-672-7_16
ID  - Mohammed2025
ER  -