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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