Evaluating Durability: A Comparative Study on the Influence of Fly Ash and Silica Fume in Potassium Magnesium Phosphate Cement Mortar
Publication: Journal of Materials in Civil Engineering
Volume 36, Issue 5
Abstract
The compressive strength retention rates of ordinary, 10wt% fly ash (FA) modified, and 15wt% silica fume (SF) modified potassium magnesium phosphate cement (MKPC) mortar blocks at different ages were measured, under the curing of water, 5%NaCl solution, and solution. This was used to investigate their water resistance and salt resistance abilities. The freeze-thaw cycle deterioration was further compared and analyzed. Finally, scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to investigate the hydration products. The results indicated that the compressive strength retention rate of the SF-modified MKPC mortar was 82.7% when it was cured in water for 150 days and above 85% when in the two mentioned salt solutions for 150 days. Compared to FA, the water resistance, salt erosion resistance, and freeze-thaw resistance of MKPC mortar were all improved by the SF because of its good physical filling and chemical effect.
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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 National Natural Science Foundation of China (No. 51978060) and Shaanxi Provincial Science and Technology Program, China (No. 2023-YBGY-184) funded the research mentioned in this study.
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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: Mar 21, 2023
Accepted: Nov 1, 2023
Published online: Feb 24, 2024
Published in print: May 1, 2024
Discussion open until: Jul 24, 2024
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