Coir fiber as reinforcement in cement-based materials

Teixeira, Ronaldo Soares; Bufalino, Lina; Tonoli, Gustavo Henrique Denzin; Santos, Sergio Francisco dos

Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/55698

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Campo DC	Valor	Idioma
dc.creator	Teixeira, Ronaldo Soares	-
dc.creator	Bufalino, Lina	-
dc.creator	Tonoli, Gustavo Henrique Denzin	-
dc.creator	Santos, Sergio Francisco dos	-
dc.date.accessioned	2022-12-15T19:10:12Z	-
dc.date.available	2022-12-15T19:10:12Z	-
dc.date.issued	2022	-
dc.identifier.citation	TEIXEIRA, R. S. et al. Coir fiber as reinforcement in cement-based materials. In: RANGAPPA, S. M. et al. (org.). Advances in Bio-Based Fiber - Moving Towards a Green Society. [S.I.]: Elsevier, 2022, p. 707-739. DOI: https://doi.org/10.1016/B978-0-12-824543-9.00008-6.	pt_BR
dc.identifier.isbn	978-0-12-824543-9	pt_BR
dc.identifier.uri	http://repositorio.ufla.br/jspui/handle/1/55698	-
dc.identifier.uri	https://doi.org/10.1016/B978-0-12-824543-9.00008-6	-
dc.description	The disposal of coconut waste in many coastal habitats worldwide is an enormous environmental problem. A valorization alternative suggests coir fibers as attractive reinforcements of many kinds of cement-based composites. The features of the raw or enhanced fibers, the compatibility between the matrix and the reinforcement phases, and the production parameters are critical for developing high-performance composites. Coir technological fibers consist of fiber bundles, phloem, and parenchyma cells. The relatively high lignin level (27%–35%) provides coir fibers great weather, fungal and bacterial resistance, and elongation at break. It has natural compatibility with cement because of relatively low levels of soluble sugars. However, water or NaOH soaking pretreatments of coir fibers release soluble sugars that hinder cement hydration, keep cellulose integrity, enhance fiber morphology, and improve chemical compatibility and interface between the matrix and reinforcement. Pressed coir-reinforced cemented-bonded fiberboards and wool boards exhibit remarkable physical strength compared to commercial products and based on quality standards. Still, the production process demands adjustments to meet mechanical strength requirements. Extruded composites reinforced with 1% and 2% of coir fibers were compared to neat cement regarding rheological, mechanical, and physical properties. The 2% coir fiber reinforcement exhibited ram pressure 38% higher compared to the neat cement paste. Accelerate aging by 200 cycles improved the modulus of rupture and water absorption of the extruded 2% reinforced composites because of the effective cement hydration, which filled the pores and densified the material structure, improving the fiber/matrix ratio.	pt_BR
dc.language	en	pt_BR
dc.publisher	Elsevier	pt_BR
dc.rights	restrictAccess	pt_BR
dc.subject	Rheological test	pt_BR
dc.subject	Coir fiber - Mechanical properties	pt_BR
dc.subject	Coir fiber - Physical properties	pt_BR
dc.subject	Extrusion process	pt_BR
dc.subject	Reologia	pt_BR
dc.subject	Fibra de coco - Propriedades mecânicas	pt_BR
dc.subject	Fibra de coco - Propriedades físicas	pt_BR
dc.subject	Extrusão	pt_BR
dc.title	Coir fiber as reinforcement in cement-based materials	pt_BR
dc.type	Capítulo de livro	pt_BR
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