Corrosion Resistance of Calcium Sulfoaluminate Cementitious Systems
Publication: Journal of Materials in Civil Engineering
Volume 35, Issue 8
Abstract
This study investigated chloride binding and corrosion of carbon steel in calcium sulfoaluminate (CSA) cement concrete exposed to external chloride solutions. CSA pastes and concrete specimens were prepared using three water-to-cement ratios () (0.4, 0.5, and 0.6) followed by wet and air curing for 55 days. Ordinary portland cement (OPC) paste and concrete specimens also were prepared and analyzed for comparison. The primary hydration product of CSA was ettringite, and its quantity increased with the increase in . Compared with OPC, the CSA pastes had a significantly lower chloride binding capacity and higher porosity, exhibiting poor performance in protecting the steel embedded in the concrete. In general, considering the compressive strength, chloride binding, and corrosion, air-cured CSA concrete performed worse than wet-cured CSA concrete.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This research was partially supported by the American Concrete Institute Foundation under Award No. CRC 2021-P0042. The authors thank Naga Pavan Vaddey for his assistance in casting concrete specimens.
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Journal of Materials in Civil Engineering
Volume 35 • Issue 8 • August 2023
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© 2023 American Society of Civil Engineers.
History
Received: Jul 7, 2022
Accepted: Dec 27, 2022
Published online: May 26, 2023
Published in print: Aug 1, 2023
Discussion open until: Oct 26, 2023
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