Performance and durability of hybrid cement-based composites reinforced with vegetable fibers at micro and nanometric scales

• Grant number: 18/00519-0
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• Start date: March 01, 2018
• End date: August 31, 2018
• Field of knowledge: Engineering - Civil Engineering - Construction Industry
• Principal Investigator: Holmer Savastano Junior
• Grantee: Viviane da Costa Correia
• Supervisor: Mònica Ardanuy Raso
• Host Institution: Faculdade de Zootecnia e Engenharia de Alimentos (FZEA). Universidade de São Paulo (USP). Pirassununga , SP, Brazil
• Institution abroad: Universitat Politècnica de Catalunya (UPC), Spain
• Associated to the scholarship: 15/21079-0 - Obtaining of nanofibrillated cellulose from bamboo and its potential as reinforcement for fragile matrices, BP.PD

Abstract

Nanofibrillated cellulose obtained from natural, available and renewable resources, possess great potential as reinforcement in cementitious materials as a result of its high specific surface area, which greatly improves adhesion with cement particles. When incorporated with pulp microfibers in hybrid reinforcements, the mechanical anchoring of the nanofibrillated cellulose with the matrix and the higher length pulp fibers has the potential to produce cementitious materials reinforced at the nano and micrometric scales resulting in improved mechanical strength and toughness. However, the use of nanoreinforcement in cementitious materials is not established, and a literature review shows deviations from the ideal nanoreinforcement level so that the performance and durability of cementitious composites are improved. This research proposes to study the hydration kinetics of cement pastes containing varying levels of nanofibrillated cellulose; study the effect of hybrid reinforcement on the microstructure and mechanical performance of composites with different levels of reinforcement at micro and nano scales; and study the degradation of the pulp and nanofibrillated cellulose after immersion of these fibers in an alkaline environment.The composites will be produced by the slurry dewatering process followed by pressing and it will be subjected to accelerated aging tests. Physical, mechanical and microstructural tests will be carried out for evaluation the effect of hybrid reinforcement in the performance and durability of composites. The outcome of this study is expected to demonstrate the viability of the application of hybrid reinforcements at micro and nanometric scales for the development of cementitious composites with improved mechanical properties for applications in the building construction industry.

Scientific publications

(The scientific publications listed on this page originate from the Web of Science or SciELO databases. Their authors have cited FAPESP grant or fellowship project numbers awarded to Principal Investigators or Fellowship Recipients, whether or not they are among the authors. This information is collected automatically and retrieved directly from those bibliometric databases.)

CORREIA, VIVIANE DA COSTA; ARDANUY, MONICA; CLARAMUNT, JOSEP; SAVASTANO JR, HOLMER. Assessment of chemical and mechanical behavior of bamboo pulp and nanofibrillated cellulose exposed to alkaline environments. Cellulose, v. 26, n. 17, p. 9269-9285, NOV 2019. (15/21079-0, 18/00519-0)