Role of Anionic Group of Methylallyl Ether-Based PCEs on Behavior of Cementitious Systems with Various Contents
Publication: Journal of Materials in Civil Engineering
Volume 36, Issue 7
Abstract
In this study, the performances of methylallyl ether (HPEG) type polycarboxylate ether-based water reducing admixtures (PCE) partially substituted with phosphate and sulfonate anionic groups were investigated. The effects of synthesized PCE’s on the fresh, rheological, and some hardened properties of mixtures prepared with cements having different contents were examined. Increasing the phosphate and sulfonate substitution ratio of PCE up to a certain value improved the rheological properties of the mixtures. Best flow retention and rheological properties were obtained with 9% phosphate (P9) and 7% sulfonate (S7) PCEs. Due to the high PCE dosage used in the Marsh-funnel and mini slump experiments, the nonadsorbed PCE in the pore solution blocked the adsorbed polymers on the cement particles. Also, the hydrodynamic radius of the polymer had a significant effect on the adsorption and dispersion performance of PCE. Morover, with the increase of cement content, the fresh properties of the mixtures were adversely affected. However, the increase in content up to a certain value improved the hardened properties of the cementitious system.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The authors appreciate contributions of the Scientific and Technological Research Council of Turkey (TUBITAK) (Grant No. 219M425). The first and second authors acknowledge the scholarship provided by Turkish Council of Higher Education (YÖK 100/2000 Program) during their PhD study. Finally, the second author acknowledges the scholarships provided by the TUBITAK 2211A program during his doctoral studies.
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Journal of Materials in Civil Engineering
Volume 36 • Issue 7 • July 2024
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© 2024 American Society of Civil Engineers.
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Received: Mar 9, 2023
Accepted: Nov 1, 2023
Published online: Apr 16, 2024
Published in print: Jul 1, 2024
Discussion open until: Sep 16, 2024
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