应用化学 ›› 2025, Vol. 42 ›› Issue (12): 1671-1678.DOI: 10.19894/j.issn.1000-0518.250111

• 研究论文 • 上一篇    下一篇

纳米SiO2掺杂对水工混凝土抗冻性能的影响

杨进(), 曹长义, 陈会建   

  1. 中建交通建设集团有限公司,北京 100071
  • 收稿日期:2025-03-27 接受日期:2025-07-18 出版日期:2025-12-01 发布日期:2025-12-30
  • 通讯作者: 杨进
  • 作者简介:1315345966@qq.com

Effects of Nano-SiO2 Doping on Frost Resistance of Hydraulic Concrete

Jin YANG(), Chang-Yi CAO, Hui-Jian CHEN   

  1. China Construction Communications Construction Group Co. ,Ltd. ,Beijing 100071,China
  • Received:2025-03-27 Accepted:2025-07-18 Published:2025-12-01 Online:2025-12-30
  • Contact: Jin YANG

摘要:

为研究新型掺合料对水工混凝土抗冻性能的影响,提高水工混凝土在极端环境下的抗冻性和耐久性。 通过采用文献资料、实验研究和数值分析等研究方法,针对不同质量分数纳米二氧化硅(Nano-SiO2)对水工混凝土的含气量、坍落度、力学性能和抗冻性能的影响进行研究。 研究结果表明: Nano-SiO2的实验最优质量分数为1.0%和1.2%; 纳米二氧化硅的掺入能降低水工混凝土的含气量和坍落度; 由抗压强度实验可知,Nano-SiO2的掺入能增强水工混凝土的抗压强度; 由抗冻性能检测实验可知,Nano-SiO2的掺入能降低相对动弹性模量。

关键词: 混凝土, 纳米复合材料, 抗冻性能, 抗压强度, 含气量

Abstract:

To study the effect of new admixtures on the frost resistance of hydraulic concrete and improve its frost resistance and durability in extreme environments, this article adopts research methods such as literature review, experimental research, and numerical analysis to study the effects of different dosages of nano silica on the air content, slump, mechanical properties, and frost resistance of hydraulic concrete. The research results indicate that the optimal mass percent of nano silica in the experiment are 1.0% and 1.2%; The addition of nano silica can reduce the air content and slump of hydraulic concrete; According to the compressive strength test, the addition of nano silica can enhance the compressive strength of hydraulic concrete; According to the frost resistance test, the addition of nano silica can reduce the relative dynamic elastic modulus.

Key words: Nano-materials, Concrete, Air content, Compressive strength, Frost resistance

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