Abstract The purpose of this study was to explore the effect of nano-scale silica on cement modification. In this study, nano-SiO2 particle materials were prepared, and then the properties of the nano-materials were analyzed by monofilament pull-out test and different amounts of SAE and PE in the preparation of nano-SiO2. Through the research, it was found that the appearance of the new nanomaterials was characterized by that the contact interface between the carbon fiber modified by nano-silica and the cement-based was dense, and the pores were not observed. Moreover, the interface was strongly bonded and the scratches were very obvious. This result indicates that the biosensor was successfully constructed; in the analysis of the influence of different content of SAE and PE on nanomaterials, it was found that the maximum increase in flexural strength was achieved when the content was 3% at 28d in the flexural strength study; in the study of compressive strength, it was found that the adulterate amount of 6% was a cutoff point for the decrease of compressive strength; when PE content was 3%, the flexural strength and compressive strength were increased to the maximum. In the load-displacement curve analysis of carbon fiber monofilament pull-out test, the modified fiber and cement matrix formed greater physical adsorption force and chemical adhesive force. The experiment showed that the critical length of cement can be significantly reduced after nano and modified research, so as to improve the strengthening effect of carbon fiber in cement matrix. Although there are some deficiencies in the research process, it also provides a basis for the future direction of new materials in the construction industry.

中文翻译：

---

纳米二氧化硅对水泥改性作用的分析

摘要 本研究旨在探讨纳米级白炭黑对水泥改性的影响。本研究制备了纳米SiO2颗粒材料，然后通过单丝拉拔试验和不同量的SAE和PE制备纳米SiO2对纳米材料的性能进行了分析。通过研究发现，新型纳米材料的出现特点是纳米二氧化硅改性的碳纤维与水泥基的接触界面致密，未观察到气孔。而且，界面结合牢固，划痕非常明显。该结果表明生物传感器构建成功；在分析不同SAE和PE含量对纳米材料的影响时，在弯曲强度研究中发现，当含量为 3% 时，在 28d 时弯曲强度的增加最大；在抗压强度研究中发现，掺假量为6%是抗压强度下降的临界点；当PE含量为3%时，抗弯强度和抗压强度提高到最大。在碳纤维单丝拉拔试验载荷-位移曲线分析中，改性纤维与水泥基体形成较大的物理吸附力和化学粘附力。实验表明，经过纳米和改性研究，可以显着降低水泥的临界长度，从而提高碳纤维在水泥基体中的强化效果。虽然在研究过程中存在一些不足，