Abstract
An experimental program which aimed at investigating the behavior of SCC containing Class F fly ash has been carried out. The fresh state properties of the concrete were assessed using methods of segregation and flow. The rheology of the paste matrix was also characterized and compared with a previously developed paste rheology model. In addition, compressive strength, chloride permeability, and mold-finish were evaluated The results indicate that it is possible to develop a SCC containing Class F fly ash that is high performing in its fresh state. Furthermore, the addition of fly ash was shown to reduce superplasticizer dosage, increase workability, and increase overall chloride permeability resistance. In addition, it was determined that the difference of densities between the aggregate and matrix influence the results of a previously developed paste rheology model.
| Original language | English (US) |
|---|---|
| Title of host publication | Workability of SCC |
| Subtitle of host publication | Roles of Its Constituents and Measurement Techniques |
| Editors | Caijun Shi, Kamal H. Khayat |
| Publisher | American Concrete Institute |
| Pages | 45-63 |
| Number of pages | 19 |
| ISBN (Electronic) | 9780870312007 |
| State | Published - Mar 9 2006 |
| Event | Workability of SCC: Roles of Its Constituents and Measurement Techniques 2005 - Held at the ACI Spring 2005 Convention - New York, United States Duration: Apr 17 2005 → Apr 20 2005 |
Publication series
| Name | American Concrete Institute, ACI Special Publication |
|---|---|
| Volume | SP-233 |
| ISSN (Print) | 0193-2527 |
Conference
| Conference | Workability of SCC: Roles of Its Constituents and Measurement Techniques 2005 - Held at the ACI Spring 2005 Convention |
|---|---|
| Country/Territory | United States |
| City | New York |
| Period | 4/17/05 → 4/20/05 |
Funding
Raissa P. Douglas is a graduate student at the Center for Advanced Cement-Based Materials at Northwestern University, Evanston, Il. She received her MS in civil engineering from Northwestern University and her BS in civil engineering from Howard University. She is a past recipient of an ACI Student Fellowship and a PCA Research Fellowship. Her research interests include self-consolidating concrete, rheology, and formwork pressure. Financial support for this project was obtained from the Portland Cement Association and Illinois Clean Coal Institute. The fly ash was obtained from Dynegy Energy.
Keywords
- Fly ash
- Permeability
- Rheology
- Self-consolidating concrete (SCC)
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- General Materials Science