Journal
COMPOSITE INTERFACES
Volume 28, Issue 5, Pages 527-542Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/09276440.2020.1793096
Keywords
Fly ash; PVA fibres; nano-CaCO3; mechanical properties; microstructure
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Funding
- Curtin University [16892235]
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The study showed that incorporating up to 2.0 wt% nano-CaCO(3)particles can enhance the performance of PVA-geopolymer composites by improving their compressive strength and flexural load-deflection. The synergistic effect of nano-CaCO(3)and well-dispersed PVA fibers in the matrix results in composites with superior mechanical properties.
This paper investigates the mechanical (compressive and flexural strengths, flexural rigidity, stiffness, impact strength, hardness, compressive strain-stress and flexural load-deflection) and microstructural properties of polyvinyl alcohol- (PVA)-geopolymer composites reinforced with different amounts of nano-CaCO(3)particles and cured at room temperature. The results reveal that using up to 2.0 wt% nano-CaCO(3)leads to an improvement in PVA-geopolymer composite performance. Composites with this amount of CaCO(3)particles exhibited compact microstructures, as well as high levels of compressive stress-strain and flexural load-deflection, leading to good adhesion or interaction within the PVA fibre interface within the matrix. It was also evident that the combined effect of nano-CaCO(3)and well-dispersed PVA fibres in the matrix leads to composites with superior mechanical properties, most clearly in samples containing 2.0 wt% nanoparticles.
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