Cement-based materials have been widely used in bridge construction. In order to further improve their performance, this study analyzed the modification and optimization functions of nano-SiO₂ materials, designed test specimens with different content of nano-SiO₂ and conducted experiments on their flow performance, compression resistance, bending resistance and impermeability. The results showed that the flow performance of the materials decreased and the impermeability decreased with the increase of nano-SiO₂ content. The compressive strength and flexural strength are the best when the content of nano-SiO₂ is 1%. On the whole, the best content of nano-SiO₂ is 1%; when the content of nano-SiO₂ is 1%, all the properties of the specimens are good, which is more conducive to the construction of bridges in various complex environments. The research in this paper has made some contributions to the further application of nano-SiO₂ in the optimization of building materials, which is conducive to the better development of building materials.

中文翻译：

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水泥基复合材料对桥梁性能的影响：纳米SiO ₂材料的改性和优化

水泥基材料已广泛用于桥梁建设中。为了进一步提高其性能，本研究分析了纳米SiO ₂材料的改性和优化功能，设计了不同含量的纳米SiO ₂试样，并对它们的流动性能，抗压性，抗弯性和抗渗性进行了实验。结果表明，随着纳米SiO ₂含量的增加，材料的流动性能降低，抗渗性降低。当纳米SiO ₂含量为1％时，抗压强度和抗弯强度最佳。总体而言，纳米SiO ₂的最佳含量为1％；当纳米SiO ₂的含量含量为1％时，试样的所有性能均良好，更有利于各种复杂环境中桥梁的建造。本文的研究为纳米SiO ₂在建筑材料优化中的进一步应用做出了贡献，有利于建筑材料的更好发展。