Proceedings of the 2025 International Conference on Resilient City and Safety Engineering (ICRCSE 2025)

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The Influence of Different Expansive Agent Dosages on The Mechanical Properties of Eccentrically Loaded Alkali-Activated Concrete-Filled Steel Tubes

Authors
Hongjie Wang1, Changchun Pei1, *
1Yanbian University, Yanji, Jilin, 133000, China
*Corresponding author. Email: peicc@ybu.edu.cn
Corresponding Author
Changchun Pei
Available Online 22 September 2025.
DOI
10.2991/978-94-6463-856-1_14How to use a DOI?
Keywords
Alkali-activated concrete; concrete-filled steel tube; UEA expansive agent; mechanical properties; autogenous shrinkage; eccentric load; cooperative working performance; bearing capacity
Abstract

Alkali-activated concrete, a low-carbon material derived from industrial by-products, offers a promising alternative to traditional cement. When applied in concrete-filled steel tube (CFST) structures, it can reduce environmental impact and expand the selection of structural materials. However, its high shrinkage may compromise the bond strength and composite action between the steel tube and concrete. To improve its mechanical performance, this study investigates the effect of different dosages of UEA expansive agent on the behavior of eccentrically loaded CFST columns using alkali-activated concrete. The results indicate that a proper amount of expansive agent can effectively reduce shrinkage, enhance the bond at the steel–concrete interface, and improve both early and long-term strength. The mixture with 5% UEA demonstrated the best overall mechanical performance.

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 2025 International Conference on Resilient City and Safety Engineering (ICRCSE 2025)
Series
Advances in Engineering Research
Publication Date
22 September 2025
ISBN
978-94-6463-856-1
ISSN
2352-5401
DOI
10.2991/978-94-6463-856-1_14How 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  - Hongjie Wang
AU  - Changchun Pei
PY  - 2025
DA  - 2025/09/22
TI  - The Influence of Different Expansive Agent Dosages on The Mechanical Properties of Eccentrically Loaded Alkali-Activated Concrete-Filled Steel Tubes
BT  - Proceedings of the 2025 International Conference on Resilient City and Safety Engineering (ICRCSE 2025)
PB  - Atlantis Press
SP  - 129
EP  - 135
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-856-1_14
DO  - 10.2991/978-94-6463-856-1_14
ID  - Wang2025
ER  -