Abstract
Class F fly ash, when combined with portland cement and hydrated, forms a high-strength material whose strength increases with increasing cement content and compaction effort, and is highest near optimum water content of around 20-30%. However, fly ash in stockpiles can be at a water content of around 50%, so completely drying to optimum water content may not be practical. If the material is left at its stockpile water content, the cement content required to achieve a given strength is about 2.5-3 times higher than the cement content required if compacting at optimum water content. However, strength can be predicted as a function of water content for water contents between the stockpile water content and the optimum water content.
| Original language | English |
|---|---|
| Pages (from-to) | 1812-1819 |
| Number of pages | 8 |
| Journal | Fuel |
| Volume | 84 |
| Issue number | 14-15 |
| DOIs | |
| State | Published - Oct 2005 |
Bibliographical note
Funding Information:The authors would like to thank Lois Sparks of Kentucky Utilities for financial support of this project, and Thomas Moore of the Kentucky Utilities Tyrone Power Plant for generously providing the fly ash necessary for creating the test specimens. The authors would also like to thank S. R. Nanduri for assistance in completing a portion of the laboratory testing.
Keywords
- Compaction
- Construction quality assurance
- Fly ash
- Portland cement
- Strength
ASJC Scopus subject areas
- General Chemical Engineering
- Fuel Technology
- Energy Engineering and Power Technology
- Organic Chemistry