Study on the effect of nanocellulose on mechanical and durability properties of ordinary Portland cement
This study aims to investigate the effects of nanocellulose(NC)addition on the performance of ordinary Portland cement.Through mechanical properties,freeze-thaw resistance,chloride ion diffusion resistance,and carbonation tests,the mechanism of the effect of different contents of nanocellulose on the performance of cement-based materials is analyzed.The results show that appropriate contents of nanocellulose(0.1%～0.15%)can significantly improve the compressive strength and flexural strength of cement.The compressive strength of cement increases by 28.9%when the nanocellulose content is 0.15%.In addition,nanocellulose significantly enhances the freeze-thaw resistance of cement.When the nanocellulose content is 0.15%,the mass loss rate of the specimens is reduced to 0.994%after 200 cycles of freeze-thaw.The chloride ion diffusion coefficient of the cement matrix is significantly reduced after adding 0.1%～0.15%nanocellulose,showing better resistance to chloride ion corrosion.The addition of 0.15%nanocellulose also has a good improvement in the resistance to carbonation of ordinary Portland cement.This study shows that as an effective modifier for cement-based composite materials,nanocellulose can significantly improving their mechanical properties and durability.
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