Influência de microfibras de celulose nas propriedades das argamassas de revestimento

Abstract

Understanding the use of cellulose microfiber in the construction industry is essential for the design of efficient materials, minimizing the occurrence of pathologies and increasing the performance and durability of coating mortars. The objective of this study was to verify the influence of the addition of cellulose microfiber at levels of 0.5%, 1% and 1.5% of the cement mass on the properties of the fresh and hardened state of the coating mortars. The methods used in the tests include the consistency index, mass density, compressive strength, modulus of elasticity and water absorption by capillarity. Through the results obtained, it was possible to conclude that the incorporation of cellulose microfibers resulted in the reduction of the consistency and mass density in the fresh state. Regarding the mechanical properties, the additions of cellulose microfibers did not significantly influence the compressive strength and dynamic modulus of elasticity. Finally, an increase in capillary absorption was observed at 90 minutes, suggesting a possible increase in the porosity of mortars with cellulose microfibers.