Effect of Protein Containing Hydrogels on the Self-Healing of Cementitious Materials
Publication: Journal of Materials in Civil Engineering
Volume 36, Issue 5
Abstract
This study examined the effect of hydrogels containing urease and proteins on the self-healing of cracked cementitious materials. The encapsulation of proteins and urease decreased the absorption of hydrogels. It was shown that proteins were able to release from hydrogels into the surrounding cementitious matrix. TGA, FTIR, and SEM showed increased calcium carbonate formation, and optical imaging indicated enhanced crack filling in the samples with hydrogels containing urease and proteins, compared to the control sample. This is attributed to the enhanced autogenous healing provided by water absorption/desorption of hydrogels as well as enzymatic reaction. Calcite was shown to be the dominant polymorph of calcium carbonate in the healing products. Interestingly, the mechanical strength regain was markedly higher in the samples with hydrogels containing urease and proteins compared to the control sample. Improved interfacial strength at the microstructure level enhances cohesion within healing products and adhesion between the healing products and crack surface, leading to overall increased mechanical strength regain. The electrical resistivity results were shown to be in agreement with the mechanical strength regain.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This study was supported in part by the National Science Foundation under the CAREER award number 1846984. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.
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Published In
Journal of Materials in Civil Engineering
Volume 36 • Issue 5 • May 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: May 25, 2023
Accepted: Nov 3, 2023
Published online: Feb 26, 2024
Published in print: May 1, 2024
Discussion open until: Jul 26, 2024
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