|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >
Effect of accelerators on Ca(OH)2 activated ground granulated blast-furnace slag at low curing temperature
This item is licensed under:Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
| Title: | Effect of accelerators on Ca(OH)2 activated ground granulated blast-furnace slag at low curing temperature |
| Authors: | Zhai, Qi Browse this author | | Kurumisawa, Kiyofumi Browse this author →KAKEN DB |
| Keywords: | GGBFS | | Additives | | Low curing temperature | | MIP | | BSE | | LEIC |
| Issue Date: | Nov-2021 |
| Publisher: | Elsevier |
| Journal Title: | Cement & concrete composites |
| Volume: | 124 |
| Start Page: | 104272 |
| Publisher DOI: | 10.1016/j.cemconcomp.2021.104272 |
| Abstract: | The early effects of three accelerators on a Ca(OH)2 activated ground granulated blast-furnace slag binder at low curing temperatures are discussed. The compressive strength, hydration kinetics, hydration products, and microstructures were investigated by isothermal calorimetry, X-ray diffraction, mercury intrusion porosimetry, scanning electron microscopy, and nuclear magnetic resonance. Results show that accelerators continue to promote the strength development of pastes in the early stage during low-temperature curing, especially with sodium sulfate, which exhibits a higher strength and hydration degree in the early stage. However, accelerators cannot effectively improve the pore structure at low-temperature curing, which severely restricts the development of strength, compared with that at 20 degrees C. Furthermore, a good correlation was found between the initial strength development and the limit equivalent ionic conductivity (LEIC), suggesting that LEIC influences the reaction acceleration of blast-furnace slag at an early age. |
| Rights: | © <2021>. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/90406 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 胡桃澤 清文
|
