In this study, the potential effect of bacterial nano-cellulose on mechanical properties of cement mortar was evaluated. For this purpose, bacterial nano-cellulose (BNC) directly as powder and gel (0.1, 0.3, and 0.5 wt%), and indirectly as coated onto the polypropylene fibers were used in the preparation of cement paste in order to investigate the effect of each method on the flexural strength, compressive strength and water absorption of specimens. Results indicated that samples containing BNC gel and powder enhanced mechanical properties. However, BNC-gel indicated inferior properties compared to powder. The maximum increase in flexural strength between all samples was observed in the specimens containing 0.5% of BNC powder, which was 104%, compared to the control sample. In addition, utilizing nanofibers decreased the water absorption of cement mortar. The water absorption of specimens containing 0.1% of the gel fibers and 0.3% of powder was decreased by 26% and 37%, respectively. According to scanning electron microscopy (SEM) analysis, the roughness and specific surface of polypropylene fibers coated with BNC were increased. This can improve the interaction of these fibers with the cement matrix. The results show clearly that the application of BNC nanofibers improves the mechanical properties of cement paste and workability of polypropylene fibers.

在这项研究中，评估了细菌纳米纤维素对水泥砂浆力学性能的潜在影响。为此，将细菌纳米纤维素（BNC）直接以粉末和凝胶（0.1、0.3和0.5 wt％）的形式，以及间接以聚丙烯纤维包被的形式用于水泥浆的制备中，以研究水泥浆的作用。每种方法对试样的抗弯强度，抗压强度和吸水率都有影响。结果表明，含有BNC凝胶和粉末的样品可增强机械性能。但是，与粉末相比，BNC凝胶的性能较差。与对照样品相比，在包含0.5％BNC粉末的样品中观察到所有样品之间的最大抗弯强度增加，为104％。此外，使用纳米纤维会降低水泥砂浆的吸水率。包含0.1％的凝胶纤维和0.3％的粉末的样品的吸水率分别降低了26％和37％。根据扫描电子显微镜（SEM）分析，涂覆有BNC的聚丙烯纤维的粗糙度和比表面增加。这可以改善这些纤维与水泥基体的相互作用。结果清楚地表明，BNC纳米纤维的应用改善了水泥浆的机械性能和聚丙烯纤维的可加工性。BNC涂层聚丙烯纤维的粗糙度和比表面积增加。这可以改善这些纤维与水泥基体的相互作用。结果清楚地表明，BNC纳米纤维的应用改善了水泥浆的机械性能和聚丙烯纤维的可加工性。BNC涂层聚丙烯纤维的粗糙度和比表面积增加。这可以改善这些纤维与水泥基体的相互作用。结果清楚地表明，BNC纳米纤维的应用改善了水泥浆的机械性能和聚丙烯纤维的可加工性。