Due to its high biocompatibility, bio-degradability, and low cost, cellulose finds application\nin disparate areas of research. Here we focus our attention on the potential applications of cellulose\nnanofiber in cement-based materials for the building sector. We first describe the chemical/morphological\ncomposition of cellulose fibers, their process and treatment, the characterization of cement-based\ncomposites, and their flexural strength. In recent research in this field, cellulose has been considered\nin the form of nano-sized particles, i.e., cellulose nanofibers (CNF) or cellulose nanocrystals (CNC).\nCNF and CNC are used for several reasons, including their mechanical and thermal properties, their\nextended surface area and lowtoxicity. This study presents some potential applications of lignocellulosic\nmicro/nanofibers (LCMNF) in cement-based composites in order to improve flexural strength. Samples\nwere made with 0.5-1.0-1.5-2.0 wt% of LCMNF obtained from pine sawdust, CEMI (Portland) and a 1:3\ncement-water ratio. The composites were then tested for flexural strength at 7, 14, and 28 days and\nthe evolution of flexural strength was assessed after water immersion during 72 h. Scanning electron\nmicroscopy was employed to visualize the bond between LCMNF and the cement matrix. Results\nshowed that LCMNF improved the flexural strength of the composite in all the dosages used.
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