Cyclic Load Impact Assessment of Long-Term Properties in Compression to Steel and Polyvinyl Alcohol Fibre-Reinforced Geopolymer Composites

This study investigates the cyclic load application impact on fly-ash-based geopolymer composites that are reinforced with a low amount of fibre reinforcement. For reinforcement purposes, polyvinyl alcohol and steel fibres are used. For testing purposes, four geopolymer composite mixes were made, th...

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Bibliographic Details
Published in:	Materials 2023-09, Vol.16 (18), p.6128
Main Authors:	Gailitis, Rihards, Sprince, Andina, Łach, Michał, Gavrilovs, Pavels, Pakrastins, Leonids
Format:	Article
Language:	eng
Subjects:	Bridges Cement Concrete mixing Creep tests Cyclic loads Ductility Fiber composites Fiber reinforcement fibre-reinforced geopolymer Fly ash fly-ash-based geopolymer composite Geopolymers Infrastructure long-term properties under cyclic load Polyethylene terephthalate Polyvinyl alcohol Real property Reinforced concrete Static loads Steel fibers Strain gauges Tensile strength Valuation Viscoelasticity
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Summary:	This study investigates the cyclic load application impact on fly-ash-based geopolymer composites that are reinforced with a low amount of fibre reinforcement. For reinforcement purposes, polyvinyl alcohol and steel fibres are used. For testing purposes, four geopolymer composite mixes were made, three of which had fibre reinforcement. Simultaneously, specimens were tested for shrinkage, static-load-induced creep, and cyclic-load-induced creep. For static and cyclic creep testing, specimens were loaded with 20% of their strength. For cyclic creep testing, load application and release cycles were seven days long. When each cycle was introduced, the load was applied in steps. Necessary load application or unloading lasted for 5 min and consisted of four steps, each 25% of the necessary load. From the long-term static and cyclic creep tests, it was seen that only the plain specimens showed that static creep strains are within cyclic creep strains. For all the other specimens, the static load was higher than the cyclic-load-induced creep amplitude. Also, 1% polyvinyl alcohol fibre-reinforced specimens showed the most elastic characteristics under cyclic load, and 1% steel fibre-reinforced specimens appeared to be the most resistant to the cyclic load introduction.
ISSN:	1996-1944 1996-1944