旨在探讨纳米纤维素（NC）掺入对普通硅酸盐水泥性能的影响。通过力学性能、抗冻融性能、抗氯离子扩散性能及碳化试验，分析不同纳米纤维素掺量对水泥基材料性能的作用机制。结果表明，适量的纳米纤维素（0.1%~0.15%）能显著提高水泥的抗压强度和抗折强度，掺量为0.15%时，水泥28d抗压强度提高了28.9%。纳米纤维素还显著增强了水泥的抗冻融性能，添加0.15%时，试件的质量损失率在200次冻融循环后降至0.994%。掺入0.1%~0.15%纳米纤维素后，水泥基体的氯离子扩散系数明显降低，表现出更好的抗氯离子侵蚀能力。0.15%纳米纤维素掺量对普通硅酸盐水泥的抗碳化性能也有较好的改善。研究显示，纳米纤维素是一种有效的水泥基复合材料改性剂，可显著改善其力学性能和耐久性。

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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