The nanofibrillated cellulose are from natural, available and renewable resource; and have high specific surface, which contributes to improve the adhesion between cement particles. The use of nanoreinforcement in cementitious materials is not established, and in the literature there are divergences from the ideal nanoreinforcemet level so that the physical and mechanical properties of cementitious composites are improved. The factors, such as production method, water/cement ratio, reinforcement level and curing greatly influences the final properties of cementitious composites. Thus, the objective of this proposal is produce nanofibrillated cellulose from bamboo organosolv pulp, and study it at different stages for the improving the cementitious composite reinforced with nanofibrillated cellulose, in order to adapt the production of the fibercement by the slurry vacuum dewatering process followed by pressing; furthermore, the objective is to study different levels of the nanofibrillated cellulose in cement materials, in order to determine the optimal level of nanoreinforcement, so that they act on the modification of the cracking process and on the control of opening of the cracks; and to verify their effect in the physical, mechanical and microstructural properties and in the durability of the composites. The nanofibrillated cellulose will produced from bamboo organosolv pulp, by the grinding process and thereafter, it will be embedded into the cementitious matrix at different levels. The composites will be subjected to physical and mechanical tests for evaluation of the flexural strength, and at the tensile test for the cracking analysis. Through the use of the nanofibrillated cellulose as nanoreinforcement, is expected to produce multi-cracked composites, with high toughness and flexural strength, for use as roofing and as sealing panel.
News published in Agência FAPESP Newsletter about the scholarship: