Cement-Based Composites Reinforced with Nanofibrillated Cellulose from Bamboo Organossolv Pulp
V. da Costa Correia, H. Savastano Jr.
Abstract. Nanofibrillated cellulose has good mechanical performance and high specific surface, which contributes to improve the adhesion between fiber and matrix. The use of cellulose nanofibres as reinforcement of cementitious materials may contribute for improving particle packing, as consequence it helps to decrease porosity and crack growth rate at nanoscale, with corresponding strengthening of the composite. Thus, the aim of this work was to study the effect of 1%, 2% and 3% (by weight) of bamboo nanofibrillated cellulose as reinforcement of cementitious composites in comparison to composites reinforced with 8% of bamboo pulp. The cementitious composites were produced by slurry-dewatering method and they were subjected to physical, mechanical e microstructural analyses at 8 days of age. The results indicated that on average 3% of nanofibrillated cellulose showed higher strength than composites reinforced with 1% and 2% of fibers. Modulus of rupture of composites reinforced with 8% of bamboo pulp was lower than composites reinforced with nanofibrillated cellulose. In relation to toughness, composites reinforced with nanofibrillated cellulose were more fragile than composites reinforced with pulp. This is due to the lower amount of nanofibrillated cellulose used as reinforcement, and due to the lower length of these fibers in comparison to pulp fibers, which reduces the pull-out energy involved in the fracture. Considering the intrinsic characteristics of the nanofibrillated cellulose, this vegetable fiber showed to be a promising material for use as nanoreinforcement of the cement-based composites, however, more studies are necessary about the optimum amount of nanofibers for improving the toughness of the cementitious composites.
Keywords
Nanofibrillated Cellulose, Bamboo, Cement-Based Composites
Published online , 9 pages
Copyright © 2018 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: V. da Costa Correia, H. Savastano Jr., ‘Cement-Based Composites Reinforced with Nanofibrillated Cellulose from Bamboo Organossolv Pulp’, Materials Research Proceedings, Vol. 7, pp 119-127, 2018
DOI: https://dx.doi.org/10.21741/9781945291838-12
The article was published as article 12 of the book Non-Conventional Materials and Technologies
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