Impact of Early Formwork Removal on Concrete Drying and Chloride Ion Diffusion
Publication: Journal of Materials in Civil Engineering
Volume 35, Issue 7
Abstract
Contractors are interested in removing and reusing the formwork from concrete walls as soon as possible to speed up construction. While the concrete may have sufficient strength, there is little information about the impact on the durability of the concrete if the forms are removed at early ages. Curing is known to maintain the concrete moisture and promote hydration to create a denser microstructure. This research investigates the type of forms, formwork removal timing, and the impact of subsequent curing methods on the drying rate and ion penetration of concrete. This study shows that early form removal does impact the durability of the concrete and subsequent usage of curing compounds or plastic can extend the curing and improve the durability of the concrete. This work quantifies the differences and provides practical recommendations for the concrete industry.
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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 funded by Oklahoma and Minnesota DOT under SP&R Project 2268. The authors gratefully acknowledge the financial support from the Minnesota Department of Transportation and the Oklahoma Department of Transportation for funding this work. The authors would like to thank Jake Hunter and David Porter for their assistance in conducting the laboratory experiments.
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Published In
Journal of Materials in Civil Engineering
Volume 35 • Issue 7 • July 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Jun 19, 2022
Accepted: Nov 2, 2022
Published online: Apr 22, 2023
Published in print: Jul 1, 2023
Discussion open until: Sep 22, 2023
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