Proceedings of the 2024 10th International Conference on Architectural, Civil and Hydraulic Engineering (ICACHE 2024)

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Control of Setting Time of Fly Ash Geopolymer

Authors
Qingwei Sun1, Zheming Zhang1, *
1College of Civil Engineering, Liaoning Technical University, Fuxin, China
*Corresponding author. Email: 13941968286@163.com
Corresponding Author
Zheming Zhang
Available Online 3 March 2025.
DOI
10.2991/978-94-6463-658-1_75How to use a DOI?
Keywords
Fly ash; Module; Setting time; Retarding agent; geopolymer
Abstract

Nowadays, Portland cement is widely used in industrial and civil construction, road traffic, water conservancy, and other construction fields. In order to promote the wide application of geopolymers in engineering, this study is to solve the problem of the fast setting and hardening of geopolymers. The performance and compressive strength are affected, and the optimal ratio is obtained. This study identified an effective retarder for fly ash geopolymer by examining the influence of various retarders on its setting time, flow properties, and compressive strength. A novel method for determining the critical pouring time of fly ash geopolymer is proposed. The retarders investigated include zinc nitrate powder, barium chloride, sodium pyrophosphate, glycerol, boric acid, borax, citric acid, and sodium gluconate. Both simple and complex retarding agents were prepared. The effects of different retarders on fly ash geopolymers were analyzed using SEM tests. When the barium chloride content is less than 2%, BaSiO3 precipitates form in the fly ash geopolymer system.

Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the 2024 10th International Conference on Architectural, Civil and Hydraulic Engineering (ICACHE 2024)
Series
Advances in Engineering Research
Publication Date
3 March 2025
ISBN
978-94-6463-658-1
ISSN
2352-5401
DOI
10.2991/978-94-6463-658-1_75How to use a DOI?
Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Qingwei Sun
AU  - Zheming Zhang
PY  - 2025
DA  - 2025/03/03
TI  - Control of Setting Time of Fly Ash Geopolymer
BT  - Proceedings of the 2024 10th International Conference on Architectural, Civil and Hydraulic Engineering (ICACHE 2024)
PB  - Atlantis Press
SP  - 738
EP  - 743
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-658-1_75
DO  - 10.2991/978-94-6463-658-1_75
ID  - Sun2025
ER  -