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Estimation of cement content in concrete by spatially resolved laser induced breakdown spectroscopy
Cement and Concrete Research ( IF 10.9 ) Pub Date : 2024-12-05 , DOI: 10.1016/j.cemconres.2024.107714
Tobias Völker, Friedrich M. Mensing, Sabine Kruschwitz

The cement content in concrete significantly influences critical properties such as durability, permeability, strength, and workability. Traditional methods for estimating the cement content face limitations. These include the need for comprehensive chemical and solubility knowledge, extensive sample preparation, and their time-consuming and destructive nature. This study investigates the application of laser-induced breakdown spectroscopy (LIBS) as an alternative method. It involves probing concrete samples with high spatial resolution and analyzing the resultant spectra. The methodology is first tested on mesoscale concrete models to assess limitations and inherent errors. Subsequently, the methodology is applied to actual concrete samples with varying cement content and aggregate size distributions. The results demonstrate a promising accuracy, with an average relative error of approximately 8%. This paper offers a comprehensive evaluation of the method’s advantages, limitations, and factors influencing its practical applicability in field conditions.

中文翻译:


通过空间分辨激光诱导击穿光谱估算混凝土中的水泥含量



混凝土中的水泥含量显着影响耐久性、渗透性、强度和可加工性等关键性能。估算水泥含量的传统方法存在局限性。这些因素包括需要全面的化学和溶解度知识、大量的样品制备以及它们耗时且具有破坏性。本研究探讨了激光诱导击穿光谱 (LIBS) 作为替代方法的应用。它涉及探测具有高空间分辨率的混凝土样品并分析所得光谱。该方法首先在中尺度混凝土模型上进行测试,以评估局限性和固有误差。随后,该方法应用于具有不同水泥含量和骨料粒度分布的实际混凝土样品。结果表明,其准确性令人鼓舞,平均相对误差约为 8%。本文全面评估了该方法的优势、局限性以及影响其在现场条件下实际适用性的因素。
更新日期:2024-12-05
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