纳米石灰分散物作为自愈石灰砂中的活性剂,用于持久的遗产保护
C De Nardi1, J Annear1, E Gualini2
1School of Engineering, Cardiff University, Queen's Buildings, The Parade, Cardiff, CF243AA Wales, UK.
概括
纳米石灰分散显示出具有自我愈合历史石的潜力. 这些先进的维修材料可以回收高达12%的强度在天然液压石灰砂,为建筑遗产保护提供持久的解决方案.
科学领域:
- 遗产保护科学 遗产保护科学
- 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.
背景情况:
- 建筑遗产面临着日益增加的气候变化风险,需要有弹性的保护策略.
- 传统的历史石修复技术需要适应以提高耐用性.
- 自愈混凝土技术为遗产保护提供了新的方法,特别是用于基于石灰的材料.
研究的目的:
- 研究纳米分散物作为天然液压 (NHL) 砂的自我修复剂.
- 评估在砂接头中纳米处理的化学物理和机械兼容性.
- 为了评估纳米修复NHL砂的治愈效率和长期性能.
主要方法:
- 纳米分散剂 (水乙醇配方) 通过 NHL 砂关节的集成血管网络的应用.
- 使用三点曲试验进行机械性能评估.
- 通过富里埃变换红外光谱 (FT-IR),X射线衍射 (XRD) 和扫描电子显微镜 (SEM) 进行物理化学兼容性评估.
主要成果:
- 纳米处理在NHL砂中实现了高达12%的强度恢复.
- 刚性恢复是可以忽略不计的;没有观察到自身愈合.
- 治愈效果持续长达280天,表明长期潜力.
- FT-IR和XRD表明C-S-H阶段形成;SEM证实了形态相容性.
结论:
- 纳米分散是一种可行的自我愈合策略,可用于耐用且兼容地修复基于的传统砂.
- 这项研究证明了先进材料在应对气候变化对建筑遗产的影响方面的潜力.
- 进一步的研究可以优化纳米配方,以提高历史石的愈合性能.
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