Abstract
Nanocellulose, being a material with nanodimensions, is characterized by high tensile strength, high modulus of elasticity, low thermal expansion, and relatively low density, as well as exhibiting very good electrical conductivity properties. The paper presents the results of research on cement mortars with the addition of nanocrystals cellulose, applied in three different amounts (0.5%, 1.0%, and 1.5%) by weight of cement, including: physical and mechanical properties, frost resistance and resistance against the detrimental effect of salt, and microstructure examination (SEM). Along with an increase in amount of admixture, the weight loss following frost resistance and salt crystallization tests is reduced. Studies have shown that the addition of nanocrystalline cellulose improves the compressive and flexural strength by 27.6% and 10.9%, respectively. After 50 freezing and thawing (F–T) cycles for the mortars with 1.5% nanocellulose admixture, an improvement in frost resistance by 98% was observed. In turn, the sulfate crystallization tests indicated a 35-fold decrease in weight loss following 1.5% nanopolymer addition to the mortar.
Highlights
At present, nanotechnology is one of the most dynamically developing interdisciplinary fields of science and technology
categories: cellulose nanocrystals (CCNC) was chosen because previously it was shown that the addition of nanocellulose with high crystallinity degree improves the hydrophobicity of concrete [31]
The nanocellulose molecular structure was characterized by means of FT-IR spectra (Figure 5a)
Summary
Nanotechnology is one of the most dynamically developing interdisciplinary fields of science and technology. It combines issues related to physics, chemistry, biology, material engineering, and bioengineering. The studies by Praveenkumar et al [5] on cement concrete with the addition of TiO2 nanomolecules and 10% rice husk enabled the obtaining of a material with greater compressive and flexural strength, as well as enhanced resistance to the effect of chlorides and acids. The cement mortars modified with nanomagnesium calcite exhibit a greater resistance against the effect of magnesium sulfate [8]. This is because the infiltration of sulfate to the mortar is retarded, as a result of reduced pore volume that occurs due to the nanomaterial application. The research conducted by Stankiewicz and Lelusz [9] proved the beneficial influence of carbon nanotube addition to cement mortar in the amount of 0.06% by weight, which resulted in the enhancement of the flexural and compressive strength by 25% and 36%, respectively, in relation to the reference mortars
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
