Development of Cast-in-Place FA-GGBFS-Based Geopolymer Mortar: An Experimental Study
Publication: Practice Periodical on Structural Design and Construction
Volume 27, Issue 2
Abstract
With the aim of developing cast-in-place geopolymer mortar hardened under ambient temperature, this study investigated the effects of the composition ratio of fly ash (FA) and ground granulated blast furnace slag (GGBFS) and various alkaline liquids on the compressive strength and density of FA-GGBFS-based geopolymer mortar. Test results clearly show that an increase in GGBFS content in FA-GGBFS-based geopolymer mortar increases the compressive strength, and at least 20% replacement of FA with GGBFS by weight can be sufficiently used as cast-in-place geopolymer mortar under ambient temperature conditions. In this study, various alkaline liquids are characterized by the molar ratios of alkaline metal Na-to- and silicon-to-alkaline metal Na, which are referred to as the alkali/water ratio and silicon/alkali ratio, respectively. In each FA-GGBFS binder mixture, there is a linear relation between the compressive strength and alkali/water ratio if the silicon/alkali ratio within a the certain range.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The authors express their gratitude to JPEC Co. Ltd., FLORIC Co. Ltd., and Prof. Miyata in the National Defense Academy for providing FA, chemical admixture, and distilled water, respectively. The authors also thank A. Yamashita and M. Kai, who are former undergraduate students in the National Defense Academy, Japan, for their assistance in performing this study.
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Information & Authors
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Published In
Practice Periodical on Structural Design and Construction
Volume 27 • Issue 2 • May 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Jun 27, 2021
Accepted: Dec 2, 2021
Published online: Feb 15, 2022
Published in print: May 1, 2022
Discussion open until: Jul 15, 2022
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