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Surface Properties of Eggshell Powder and Its Influence on Cement Hydration
Yinghou He1, Dehao Che1, Xiaowei Ouyang1
1Research Center of Wind Engineering and Engineering Vibration, Guangzhou University, Guangzhou 510006, China.
Materials (Basel, Switzerland)
|November 11, 2022
Summary
Eggshell powder (EP) can replace cement in construction materials, reducing waste and pollution. EP interacts weakly with calcium ions, affecting cement hydration differently than limestone powder.
Area of Science:
- Materials Science
- Civil Engineering
- Environmental Science
Background:
- Eggshell powder (EP) offers a sustainable alternative to cement in construction materials.
- EP utilization can mitigate pollution from both eggshell waste and cement production.
- Understanding EP's surface properties is crucial for its effective application in cement-based materials.
Purpose of the Study:
- To investigate the surface properties of eggshell powder (EP).
- To analyze the influence of EP on cement hydration processes.
- To compare EP with quartz powder (QP) and limestone powder (LP) regarding surface interactions and hydration effects.
Main Methods:
- Characterization of EP's chemical composition.
- Zeta potential measurements to analyze surface charge properties and Ca2+ interactions.
- Scanning Electron Microscopy (SEM) to observe hydrate morphology on particle surfaces.
Main Results:
- EP and LP, despite similar compositions, show distinct surface charge properties due to organic matter and atomic structure differences.
- EP exhibits Ca2+ interaction similar to QP and weaker than LP.
- Weaker Ca2+ interaction with EP results in less C-S-H gel formation compared to LP.
Conclusions:
- EP's surface characteristics significantly influence cement hydration.
- Heat treatment can enhance EP's chemical reactivity for improved performance.
- This research provides a theoretical basis for optimizing EP use in cement-based materials.
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