Effects of EVA and SAE Emulsions on Hydration and Drying Shrinkage of Calcium Sulfoaluminate Cement Pastes
Publication: Journal of Materials in Civil Engineering
Volume 36, Issue 7
Abstract
The utilization of calcium sulfoaluminate (CSA) cement, known for its rapid strength gain and low carbon footprint, has been increasingly prevalent in the field of construction. This research aims to enhance the mechanical properties of CSA cement-based materials by incorporating ethylene-vinyl acetate (EVA) and styrene acrylate ester (SAE) copolymers. Various dosages (expressed as mass fractions) of EVA and SAE were utilized in the production of CSA cement pastes. The fluidity, setting time, electrical resistivity, and mechanical properties, including flexural strength, compressive strength, and drying shrinkage behavior, were thoroughly assessed for the CSA cement pastes, and the products of hydration in the cement pastes were analyzed. The findings suggest that the inclusion of polymer emulsions in CSA cement pastes resulted in prolonging setting time and hindering hydration. While the addition of SAE did not enhance flexural and compressive strength, the incorporation of 10% SAE effectively reduced drying shrinkage and significantly improved the flexural-to-compressive strength ratio of the CSA cement pastes after 6 h. When the SAE content reached 5%, the fluidity of cement paste could be effectively increased. On the other hand, the inclusion of EVA improved the early-age flexural strength at 6 h but did not effectively reduce drying shrinkage in the CSA cement pastes. When 5% EVA was used, the 28-day compressive strength exceeded that of the control sample (with no polymer).
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Data Availability Statement
Data will be made available on request.
Acknowledgments
The authors gratefully acknowledge the financial support of the National College Students Innovation and Entrepreneurship Training Program under Grant No. 201810488001, the National Natural Science Foundation of China under Grant No. 51608402, and the Hubei Provincial Construction Science and Technology Research Program under Grant No. 2021-2075-38.
Author contributions: Qi Ding: Experiments, Methodology, Writing—Original draft preparation, Revising. Yishun Liao: Conceptualization, Discussion, Funding acquisition, Revising, Supervision. Jinxin Yao: Experiments, Conceptualization, Revising and editing. Hao Xu: Experiments. Yuzhang Gao: Experiments. Seth Silupumbwe: Revising. Kejin Wang: Conceptualization, Revising. Shengwen Tang: Discussion, Revising.
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Published In
Journal of Materials in Civil Engineering
Volume 36 • Issue 7 • July 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Aug 5, 2023
Accepted: Dec 28, 2023
Published online: Apr 25, 2024
Published in print: Jul 1, 2024
Discussion open until: Sep 25, 2024
ASCE Technical Topics:
- Calcium
- Cement
- Chemical compounds
- Chemical elements
- Chemicals
- Chemistry
- Compressive strength
- Concrete
- Engineering materials (by type)
- Environmental engineering
- Flexural strength
- Hydration
- Laminating
- Material mechanics
- Material properties
- Materials engineering
- Materials processing
- Shrinkage (material)
- Strength of materials
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