评论 Ren 等人的《从微观结构和结合水的角度对深海粘土触变机理的实验研究》(2023 年),Acta Geotechnica,https://doi.org/10.1007/s11440-023-01967-5

IF 5.6 1区 工程技术 Q1 ENGINEERING, GEOLOGICAL
Wei Sun, Yucheng Li, Guoping Zhang
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引用次数: 0

摘要

Ren 等人(Acta Geotech, 2023. https://doi.org/10.1007/s11440-023-01967-5)最近报告了一项关于深海海洋粘土触变性或触变机理的有趣实验研究,确凿地声称除了微结构变化之外,弱结合水和强结合水向自由水的转化也是造成所研究粘土触变性硬化的原因。在触变硬化过程中,使用扫描电子显微镜以推测和定性的方式观察了粘土的微观结构演变,同时使用热重分析(TGA)对粘土中不同类型水(即弱结合水、强结合水和自由水)的相互转化进行了定量评估,并使用傅立叶变换红外光谱(FTIR)进行了定性判断。然而,在所采用的实验技术的可行性和适用性以及热重分析和傅立叶变换红外光谱分析结果的解释方面出现了一些基本问题,值得重新研究和讨论。在这篇简短的文章中,我们根据数学上更精确、科学上更严谨的数据分析,对 TGA 曲线和傅立叶变换红外光谱进行了重新解释。因此,将触变性或一种潜在的触变性归因于不同类型水之间的转换,以及根据推测解释得出的结论,也值得进一步澄清和评论。总之,TGA 和傅立叶变换红外光谱结果可能无法最终确定在触变硬化过程中发生的不同类型水之间的转换。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Comment on “Experimental study on the thixotropic mechanism of deep-sea clay from the perspective of microstructure and bound water” by Ren et al. (2023), Acta Geotechnica, https://doi.org/10.1007/s11440-023-01967-5

Comment on “Experimental study on the thixotropic mechanism of deep-sea clay from the perspective of microstructure and bound water” by Ren et al. (2023), Acta Geotechnica, https://doi.org/10.1007/s11440-023-01967-5

Ren et al. (Acta Geotech, 2023. https://doi.org/10.1007/s11440-023-01967-5) recently reported an interesting experimental investigation of the thixotropism, or thixotropy mechanism, of a deep-sea marine clay, conclusively claiming that the conversion of weakly and strongly bound waters to free water, in addition to microfabric change, contributes to the thixotropic hardening of the studied clay. While the microfabric evolution of the clay during the thixotropic hardening process was observed, in a speculative and qualitative fashion, using scanning electron microscopy, the interconversion of different types of waters (i.e., weakly bound water, strongly bound water, and free water) in the clay was quantitatively assessed using thermogravimetric analysis (TGA) and qualitatively judged by Fourier transform infrared spectroscopy (FTIR). However, some fundamental issues related to the viability and suitability of the employed experimental techniques and the interpretation of TGA and FTIR results arise and are worth re-examination and discussion. In this short communication, the TGA curves and FTIR spectra were re-interpreted, based on a mathematically more accurate and scientifically more rigorous analysis of the data, which appears to make the proposed model of evolution of different types of waters in clays invalid. Consequently, the attribution of thixotropy or one potential thixotropism to the conversion among different types of waters and the conclusions drawn based on the speculative interpretations are also worth further clarifying and commenting. Overall, the TGA and FTIR results probably fail to conclusively establish the conversion among the different types of waters occurring along with the thixotropic hardening process.

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来源期刊
Acta Geotechnica
Acta Geotechnica ENGINEERING, GEOLOGICAL-
CiteScore
9.90
自引率
17.50%
发文量
297
审稿时长
4 months
期刊介绍: Acta Geotechnica is an international journal devoted to the publication and dissemination of basic and applied research in geoengineering – an interdisciplinary field dealing with geomaterials such as soils and rocks. Coverage emphasizes the interplay between geomechanical models and their engineering applications. The journal presents original research papers on fundamental concepts in geomechanics and their novel applications in geoengineering based on experimental, analytical and/or numerical approaches. The main purpose of the journal is to foster understanding of the fundamental mechanisms behind the phenomena and processes in geomaterials, from kilometer-scale problems as they occur in geoscience, and down to the nano-scale, with their potential impact on geoengineering. The journal strives to report and archive progress in the field in a timely manner, presenting research papers, review articles, short notes and letters to the editors.
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