一种多功能混凝土复合材料,用于铺路地板下层
Mohammad Jawed Roshan1, Mohammadmahdi Abedi1, António Gomes Correia1
1Department of Civil Engineering, ISISE, ARISE, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal.
Materials (Basel, Switzerland)
|April 9, 2024
概括
这项研究开发了一种自我感应的水泥复合材料,用于智能化下层层. 复合材料有效监测压力,应变和损坏,增强运输基础设施的健康.
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.
- 智能结构是一个智能结构.
背景情况:
- 交通基础设施层的过早故障和退化带来了重大挑战.
- 结构健康监测 (SHM) 对于路面施工层来说至关重要,以解决这些问题.
研究的目的:
- 研究一种新型自我感应的水泥复合材料的应力/应变感应和损伤检测能力.
- 评估复合材料在智能分层层中使用的潜力.
主要方法:
- 使用水泥,多壁碳纳米管 (MWCNTs) 和石墨烯纳米板 (GNPs) 制造一种自我感应的水泥复合材料.
- 压电阻分析以评估应力/应变感应性能.
- 电化学阻抗光谱 (EIS) 用于损伤检测.
- 扫描电子显微镜 (SEM) 用于微观结构分析.
主要成果:
- 电阻对MWCNT/GNP度敏感,响应性需要>0.5%.
- 增加的MWCNT/GNP度和压力水平提高了压力/应变感应性能.
- 电阻的分数变化 (FCR) 与弹性模量相关,表明刚度的变化.
- EIS分析显示,在材料故障之前和之后,尼奎斯特的地块发生了明显的变化.
- SEM图像显示了复合材料中的MWCNT桥接和GNP填充效应.
结论:
- 开发的自我感应的水泥复合材料展示了SHM在路面施工中的有前途能力.
- 复合材料的压电阻和电化学特性可以有效地监测结构完整性和损坏.
- 这种智能次级材料为改善运输基础设施的耐用性和降低运输基础设施维护成本提供了途径.
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