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Influence of Graphene Oxide Nanoparticles on Bond-Slip Reponses between Fiber and Geopolymer Mortar

Intarabut, Darrakorn; Sukontasukkul, Piti; Phoo-n gernkham, Tanakorn; Zhang, Hexin; Yoo, Doo-Yeol; Limkatanyu, Suchart; Chindaprasirt, Prinya

Authors

Darrakorn Intarabut

Piti Sukontasukkul

Tanakorn Phoo-n gernkham

Doo-Yeol Yoo

Suchart Limkatanyu

Prinya Chindaprasirt



Abstract

In this study, the influence of graphene oxide nanoparticles on the bond-slip behavior of fiber and fly ash-based geopolymer paste was examined. Geopolymer paste incorporating a graphene oxide nanoparticles solution was cast in half briquetted specimens and embedded with a fiber. Three types of fiber were used: steel, polypropylene, and basalt. The pullout test was performed at two distinct speeds: 1 mm/s and 3 mm/s. Results showed that the addition of graphene oxide increased the compressive strength of the geopolymer by about 7%. The bond-slip responses of fibers embedded in the geopolymer mixed with graphene oxide exhibited higher peak stress and toughness compared to those embedded in a normal geopolymer. Each fiber type also showed a different mode of failure. Both steel and polypropylene fibers showed full bond-slip responses due to their high ductility. Basalt fiber, on the other hand, because of its brittleness, failed by fiber fracture mode, which showed no slip in pullout responses. Both bond strength and toughness were found to be rate sensitive. The sensitivity was higher in the graphene oxide/geopolymer than in the conventional geopolymer.

Journal Article Type Article
Acceptance Date Mar 9, 2022
Online Publication Date Mar 13, 2022
Publication Date 2022
Deposit Date Mar 10, 2022
Publicly Available Date Mar 14, 2022
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 12
Issue 6
Article Number 943
DOI https://doi.org/10.3390/nano12060943
Keywords Geopolymer; Graphene oxide; Single fiber pullout; Bond-slip; Rate sensitive
Public URL http://researchrepository.napier.ac.uk/Output/2852563

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