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Effect of retarders on flow and strength development of alkali-activated fly ash/blast furnace slag composite
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| Title: | Effect of retarders on flow and strength development of alkali-activated fly ash/blast furnace slag composite |
| Authors: | Sasaki, Kenta Browse this author | | Kurumisawa, Kiyofumi Browse this author →KAKEN DB | | Ibayashi, Kouhei Browse this author |
| Keywords: | Geopolymer | | Fly ash | | Blast furnace slag | | Compressive strength | | Setting time | | Retarder | | Chelator |
| Issue Date: | 20-Aug-2019 |
| Publisher: | Elsevier |
| Journal Title: | Construction and building materials |
| Volume: | 216 |
| Start Page: | 337 |
| End Page: | 346 |
| Publisher DOI: | 10.1016/j.conbuildmat.2019.05.022 |
| Abstract: | Geopolymer concrete presents a major problem regarding its practical application, in that the geopolymer paste has very short setting time. Previous studies have shown that the addition of blast furnace slag to geopolymer paste considerably shortens the setting time. Based on these findings, in the present study, setting retarders were used to lengthen the setting time of the geopolymer paste. The objective of the present study was to identify the effect of a setting retarder on the fluidity and compressive strength of alkali-activated fly ash/blast furnace slag-based materials. It was shown that, by adding a chelator as a retarder, the setting time can be prolonged. However, the setting time was found to be dependent on the type of chelator. Similarly, the compressive strength development of the geopolymer was also found to be dependent on the type of chelator. It was clarified that the concentration of calcium and aluminum in solution during hardening changes with the addition of a chelator, and it was shown that there is a correlation between the concentrations of calcium and aluminum and the setting time. |
| Rights: | © 2019. 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/2115/82495 |
| 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)
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Submitter: 胡桃澤 清文
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