On the path to a new generation of cement-based composites through the use of lignocellulosic micro/nanofibers
Due to its high biocompatibility, bio-degradability, and low cost, cellulose finds application in disparate areas of research. Here we focus our attention on the potential applications of cellulose nanofiber in cement-basedmaterials for the building sector. We first describe the chemical/morphologic...
| Autores: | , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Consejo General de la Arquitectura Técnica de España (CGATE) |
| Repositorio: | RIARTE |
| OAI Identifier: | oai:www.riarte.es:20.500.12251/1545 |
| Acceso en línea: | http://hdl.handle.net/20.500.12251/1545 https://doi.org/10.3390/ma12101584 |
| Access Level: | acceso abierto |
| Palabra clave: | Nanofibras Propiedades mecánicas Celulosa Refuerzo estructuras Durabilidad Fibra vegetal Bioconstrucción Reciclaje - Construcción Material sostenible Morteros - Construcción 2211.02 Materiales Compuestos 3308.02 Residuos Industriales 2304.11 Fibras Naturales 3312.08 Propiedades de Los Materiales 3313.04 Material de Construcción 3312.09 Resistencia de Materiales 3312.12 Ensayo de Materiales |
| Sumario: | Due to its high biocompatibility, bio-degradability, and low cost, cellulose finds application in disparate areas of research. Here we focus our attention on the potential applications of cellulose nanofiber in cement-basedmaterials for the building sector. We first describe the chemical/morphological composition of cellulose fibers, their process and treatment, the characterization of cement-based composites, and their flexural strength. In recent research in this field, cellulose has been considered in the form of nano-sized particles, i.e., cellulose nanofibers (CNF) or cellulose nanocrystals (CNC). CNF and CNC are used for several reasons, including their mechanical and thermal properties, their extended surface area and lowtoxicity. This study presents some potential applications of lignocellulosic micro/nanofibers (LCMNF) in cement-based composites in order to improve flexural strength. Samples were made with 0.5-1.0-1.5-2.0 wt% of LCMNF obtained from pine sawdust, CEMI (Portland) and a 1:3 cement-water ratio. The composites were then tested for flexural strength at 7, 14, and 28 days and the evolution of flexural strength was assessed after water immersion during 72 h. Scanning electron microscopy was employed to visualize the bond between LCMNF and the cement matrix. Results showed that LCMNF improved the flexural strength of the composite in all the dosages used. © 2019 by the authors. |
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