Synergistic Effect of C-S-H–PCE and on the Hydration Properties of Lithium Slag–Cement Composite Binder
Publication: Journal of Materials in Civil Engineering
Volume 36, Issue 12
Abstract
To enhance the early strength development of lithium slag composite binder, synergistic action of calcium silicate hydrates (C─ S─ Hs)–polycarboxylate (PCE) and on the hydration properties of lithium slag–cement binder was studied. Results showed that C─ S─ H─ PCE and synergistically facilitated the solidification and hardening of composite binder. The combination of 2% C─ S─ H─ PCE and 6% enhanced the compressive strength of the composite cement mortar at 1 day, 3 days, and 28 days by 37.6%, 33.1%, and 9.9%, respectively. By providing nucleation sites, C─ S─ H─ PCE facilitated the early hydration of silicates and the pozzolanic reaction of lithium slag, leading to shortened induction period, advanced heat release peak, increased total hydration heat release, and increased production of portlandite (CH) crystals. Aluminum sulfate facilitated dissolution of lithium slag (LS) and expedited the production of ettringite (AFt). The synergistic adoption of C─ S─ H─ PCE and facilitated the hydration of both clinker and LS, and the hydration products were more abundant, contributing to a more compact matrix.
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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
The authors acknowledge the support of National Natural Science Foundation of China (No. 51808369), CRSRI Open Research Program (CKWV20221020/KY), Postgraduate Research & Practice Innovation Program of Jiangsu Province (SJCX22_1577, SJCX23_1722).
Author contributions: Yan He: Writing–original draft, Formal analysis, Software. Mingjing Jiang: Supervision, Methodology, Visualization. Shuhua Liu: Resources, Supervision. R. D. Hooton: Supervision.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 36 • Issue 12 • December 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Sep 25, 2023
Accepted: Apr 26, 2024
Published online: Sep 18, 2024
Published in print: Dec 1, 2024
Discussion open until: Feb 18, 2025
ASCE Technical Topics:
- [Inorganic compounds]
- Binders (material)
- Chemicals
- Chemistry
- Composite materials
- Engineering materials (by type)
- Engineering mechanics
- Environmental engineering
- Hydration
- Laminating
- Material mechanics
- Material properties
- Materials engineering
- Materials processing
- Organic compounds
- Organic compounds
- PCE
- Pollutants
- Silica
- Slag
- Strength of materials
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