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Long-term Mechanical Properties and Microstructure of Concrete Utilizing Self-Cementing Fly Ash as A Sole Binder Material.
- Source :
-
Civil Engineering Dimension . Sep2023, Vol. 25 Issue 2, p106-114. 9p. - Publication Year :
- 2023
-
Abstract
- Self-cementing fly ash, containing calcium oxide (CaO) of about 20%, has successfully become a sole binder material in concrete through hydration. A very low water-to-fly ash ratio, e.g., below 0.20, is the main key to achieving the high compressive strength of concrete. This study explores the strength evolution, long-term compressive strength, and mechanical properties of concrete that utilize self-cementing fly ash as a sole binder material. Remarkably, the long-term compressive strength continues to develop over a year, reaching nearly 50 MPa at 365 days, a 34% increase from the 28-day strength. While the other mechanical properties are slightly lower than predictions from empirical formulas for Portland cement concrete, promising results are observed. Scanning Electron Microscope (SEM) images highlight surface-restricted hydration products in self-cementing fly ash, rather than full dissolution of fly ash particles. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14109530
- Volume :
- 25
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Civil Engineering Dimension
- Publication Type :
- Academic Journal
- Accession number :
- 173065976
- Full Text :
- https://doi.org/10.9744/CED.25.2.106-114