使用激光诱导分解光谱和多变量分析对混凝土压缩强度进行准非破坏性估计
1Central Research Institute of Electric Power Industry, Grid Innovation Research Laboratory, Kanagawa, Japan.
Applied spectroscopy
|June 17, 2024
概括
本研究引入了一种使用激光诱导分解光谱和多变量分析的新型非破坏性方法,以准确估计混凝土的压力强度. 该技术克服了传统方法的局限性,消除了粗聚合物分布的影响.
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.
- 分析化学 分析化学
背景情况:
- 评估钢筋结构降解需要准确的压力强度估计.
- 传统的非破坏性方法 (例如,超声波脉冲速度) 受粗的聚合物分布的影响,导致测量变化.
- 需要一种可靠的,非破坏性的技术,独立于总空间分布.
研究的目的:
- 开发和验证一种用于估计混凝土压力强度的非破坏性方法.
- 为了克服与粗聚合物影响有关的现有方法的局限性.
- 为此目的,利用激光诱导分解光谱学 (LIBS) 与多变量分析相结合.
主要方法:
- 开发了一种使用激光诱导分解光谱 (LIBS) 分析混凝土的方法.
- 采用多变量分析,包括主要成分分析 (PCA) 和部分最小平方回归 (PLSR),以处理光谱数据.
- 从混合聚合物和砂光谱中提取了与压力强度相关的砂光谱.
主要成果:
- 基于LIBS的方法准确估计了混凝土的压力强度.
- 估计的强度与传统的压力强度测试有很强的一致性.
- 多变量分析有效地隔离了砂光谱,减轻了聚合的影响.
结论:
- 拟议的LIBS和多变量分析方法为混凝土压力强度评估提供了一种可行的非破坏性方法.
- 该技术对粗聚合物分布不敏感,解决了传统方法的一个关键局限性.
- 该方法的简单设置和PLSR的噪声不敏感性促进了现场的实际应用.
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