Author(s)
Chihiro Nagata, Advanced Course of Interdisciplinary Technology Development, National Institute of Technology, Gifu College, Gifu Prefecture, Japan
So Goto, Central Research Institute, Taiheiyo Cement Corporation, Chiba Prefecture, Japan
Akihiro Maegawa, Monozukuri Research Section, Mie Prefecture Industrial Research Institute, Mie Prefecture, Japan
Takashi Hirose, Design and Development Group, Maruji Concrete Industrial Co., Ltd, Gifu Prefecture, Japan
Toshitsugu Inukai, Department of Architecture, National Institute of Technology, Gifu College, Gifu Prefecture, Japan

Abstract
Glass fiber-reinforced mortars (GRM) are widely used exterior material in construction. However, their flexural strength decreases owing to the deterioration of glass fibers in alkali environment, which can be attributed to the formation of Ca(OH)2. On the other hand, Geopolymers (GP) that do not use cement as a binder can hinder the formation of Ca(OH)2. Therefore, it is assumed that GRM as a GP mortar can suppress the deterioration of alkali-resistant glass fibers. In this study, we experimentally examine the compression and flexural strength of glass fiber-reinforced GP mortar. Our results show that the compression strength of the GP mortar decreased as the addition rate of the retarding admixture increased, regardless of the alkaline water or fly ash ratio. However, the fluidity enhanced with the addition of coagulation retardant with strength exceeding 1.0%. Furthermore, the glass fiber-reinforced GP mortar exhibited a relatively smaller flexural compared to glass fiber-reinforced mortars, using ordinary Portland or GRC cements. It was confirmed that there was no alkali-induced deterioration of the alkali-resistant glass fiber until 28 d of material age.

Keywords
Geopolymer, glass fiber, fly ash, citric acid anhydride, compression strength, flexural strength

Cite this paper
Chihiro Nagata, So Goto, Akihiro Maegawa, Takashi Hirose, Toshitsugu Inukai, Fundamental Study on Glass Fiber-Reinforced Geopolymer Mortar, SCIREA Journal of Civil Engineering and Building Construction. Vol. 8 , No. 1 , 2023 , pp. 49 - 64 . https://doi.org/10.54647/cebc560118

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