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标准砂作为在水泥中纳米的功能载体的创新应用
Meytal Shalit1, Yaniv Knop2, Maya Radune2
1Department of Chemistry, The Institute of Nanotechnology, Bar-Ilan University, Ramat Gan 52900, Israel.
Materials (Basel, Switzerland)
|September 27, 2025
概括
将纳米二氧化 (NS) 涂在沙粒 (sand@NS) 上,可以改善其在混凝土中的分散,显著提高压力强度并减少水的吸收. 这种新的方法增强了混凝土的性能,并支持可持续建筑.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 纳米技术纳米技术
背景情况:
- 纳米二氧化 (NS) 增强了水泥材料,但受到聚合的影响,限制了其有效性.
- 在混凝土中,NS的均分散对于最大限度地发挥其益处至关重要.
研究的目的:
- 通过将其涂在沙粒 (sand@NS) 上来改善水泥中的纳米 dispersion.
- 评估沙@NS对混凝土机械性能,耐用性和微观结构的影响.
- 探索先进建筑材料的可扩展和具有成本效益的战略.
主要方法:
- 在标准的沙粒上涂上纳米二氧化,使用Stöber方法制造沙@NS.
- 在水泥混合物中加入沙@NS.
- 在3,7和28天测量压力强度.
- 评估水的吸收和微观结构密度.
主要成果:
- 沙@NS显著提高了早期的水分和强度,与参考混凝土相比,28天后压力强度增加了145%.
- 免费的NS结合导致压力强度增加了120%.
- 砂@NS降低了水的吸收,增加了微观结构密度,即使降低了水泥含量.
- 增强的力量归因于核化部位和固定NS的pozzolanic活动.
结论:
- 将NS涂在沙子上是一种有前途的策略,可以克服分散问题并提高混凝土的性能.
- 沙@NS有助于提高机械性能和耐久性,使更可持续和生态效能的混凝土生产成为可能.
- 这种方法提供了一种可扩展的,具有成本效益的方法,用于在先进的建筑材料中利用NS.
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