Abstract
This study extracted pore solution from the hardened blast furnace slag pastes activated with sodium silicate and/or sodium hydroxide through the steel-die method and analyzed the aqueous phase composition via ICP-OES technique. The results show that the concentrations of Si, Al, Na and OH" decrease with progress of slag reaction and increase with increase of Na20, while the concentration of Ca shows no substantial change. The concentrations of Na, Al and Ca are positively correlated to the concentration of OH" in a quasi-linear relationship, while the concentration of Si has a great dependence on the initial concentration of 0H'. Two regions were identified in the plots between the concentrations of Si and Ca, by which two kinds of C-S-H gels are expected. The Al/Si is linearly correlated to Na/Si for both sodium hydroxide and sodium silicate activated systems.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 2nd international conference on the chemistry of construction materials |
| Subtitle of host publication | Munchen, Germany |
| Editors | Johann Plank, Lei Lei, Timon Echt |
| Place of Publication | Frankfurt |
| Publisher | Gesellschaft Deutcher Chemiker |
| Pages | 23-27 |
| Volume | 50 |
| ISBN (Electronic) | 978-3-936028-96-6 |
| Publication status | Published - 2016 |
| Event | 2nd International Conference on the Chemistry of Construction Materials: Munchen, Germany - Technical University in Munich, Munchen, Germany Duration: 10 Oct 2016 → 12 Oct 2016 Conference number: 2 https://www.gdch.de/index.php?id=2864 |
Publication series
| Name | GDCh-Monograp |
|---|---|
| Volume | 50 |
Conference
| Conference | 2nd International Conference on the Chemistry of Construction Materials |
|---|---|
| Abbreviated title | ICCCM 2016 |
| Country/Territory | Germany |
| City | Munchen |
| Period | 10/10/16 → 12/10/16 |
| Internet address |
Keywords
- alkaline activation
- slag
- Pore solution
- aqueous phase