This paper presents a first-time investigation into the effects of an eco-friendly sodium bicarbonate fiber treatment on the mechanical properties of metakaolin-based geopolymers reinforced with short sisal fibers. For this purpose, geopolymer composites were initially manufactured by replacing different weight contents (0.5–2.0 wt.%) of aggregate (river sand) with untreated natural fibers. Subsequently, sisal fibers were soaked for 120 h in varying concentrations of aqueous NaHCO3 solutions (2.5–10 wt.%) to assess the influence of solution concentration on the performance of 2% fiber-reinforced geopolymer composites. All the manufactured composites were characterized through quasi-static compression, flexural, and Brazilian tests. The experimental results revealed that both increasing the fiber content and pre-treating the sisal fibers significantly affect the mechanical response of the geopolymer composites.
Sanfilippo C., Fiore V., Calabrese L., Megna B., Valenza A. (2024). Impact of Surface Treatment on the Strengthening of Geopolymer Composites Reinforced with Short Sisal Fibers. JOM, 76(8), 4514-4525 [10.1007/s11837-024-06700-5].
Impact of Surface Treatment on the Strengthening of Geopolymer Composites Reinforced with Short Sisal Fibers
Sanfilippo C.;Fiore V.
;Megna B.;Valenza A.
2024-08-01
Abstract
This paper presents a first-time investigation into the effects of an eco-friendly sodium bicarbonate fiber treatment on the mechanical properties of metakaolin-based geopolymers reinforced with short sisal fibers. For this purpose, geopolymer composites were initially manufactured by replacing different weight contents (0.5–2.0 wt.%) of aggregate (river sand) with untreated natural fibers. Subsequently, sisal fibers were soaked for 120 h in varying concentrations of aqueous NaHCO3 solutions (2.5–10 wt.%) to assess the influence of solution concentration on the performance of 2% fiber-reinforced geopolymer composites. All the manufactured composites were characterized through quasi-static compression, flexural, and Brazilian tests. The experimental results revealed that both increasing the fiber content and pre-treating the sisal fibers significantly affect the mechanical response of the geopolymer composites.File | Dimensione | Formato | |
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2024_Impact of surface treatment on the strengthening of geopolymer composites reinforced with short sisal fibers.pdf
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