通过飞行时间二次离子质谱分析了解和量化 C-S-H 中硅酸盐四面体的新方法

IF 10.8 1区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY
Yue Zhou , Linglin Xu , Zheyu Zhu , Yuting Chen , Zhongping Wang , Yun Gao , Kai Wu
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引用次数: 0

摘要

水泥基材料的性能在很大程度上取决于硅酸钙水合物(C-S-H)。在这项工作中,提出了以高分辨率为特点的飞行时间二次离子质谱法(TOF-SIMS),用于定量测定特定微米区域内 C-S-H 的硅酸盐四面体含量。为进行 TOF-SIMS 分析,建立了一个 C-S-H 数据库,其中通过离子强度量化了局部水合物中的硅酸盐含量。结果表明,在 C-S-H 分解过程中可检测到 8 个负离子和 19 个正离子片段。通过从离子碎片中选择代表不同硅酸盐结构的特征离子,可以建立特征离子强度与 C-S-H 中硅酸盐含量之间的函数关系。提出了量化方程来计算各种明矾石水合物的 Qn 结构含量。根据 TOF-SIMS 定量结果,成功构建了在对照和预压样品中分配有缺陷的硅酸盐结构。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

A novel method to understand and quantify silicate tetrahedron in C-S-H by time of flight secondary ion mass spectrometry analysis

A novel method to understand and quantify silicate tetrahedron in C-S-H by time of flight secondary ion mass spectrometry analysis

A novel method to understand and quantify silicate tetrahedron in C-S-H by time of flight secondary ion mass spectrometry analysis
The performance of cementitious materials is highly determined by calcium silicate hydrate (C-S-H). In this work, time of flight secondary ion mass spectrometry (TOF-SIMS) characterized by its high resolution was proposed to quantitatively determine the silicate tetrahedron content of C-S-H in a specific micron area. A C-S-H database in which the silicate content in local hydrates is quantified by ion intensity, was established for TOF-SIMS analysis. Results indicate that 8 negative ions and 19 positive ion fragments can be detected among the decomposition of C-S-H. By selecting the characteristic ions representing different silicate structures from ion fragments, the functional relationship between the intensity of characteristic ions and the silicate contents in C-S-H can be established. The quantification equation was proposed to calculate Qn structure contents for various alite hydrates. The silicate structures with defects allocated in the control and pre-pressed sample was constructed successfully based on the TOF-SIMS quantitative results.
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来源期刊
Cement & concrete composites
Cement & concrete composites 工程技术-材料科学:复合
CiteScore
18.70
自引率
11.40%
发文量
459
审稿时长
65 days
期刊介绍: Cement & concrete composites focuses on advancements in cement-concrete composite technology and the production, use, and performance of cement-based construction materials. It covers a wide range of materials, including fiber-reinforced composites, polymer composites, ferrocement, and those incorporating special aggregates or waste materials. Major themes include microstructure, material properties, testing, durability, mechanics, modeling, design, fabrication, and practical applications. The journal welcomes papers on structural behavior, field studies, repair and maintenance, serviceability, and sustainability. It aims to enhance understanding, provide a platform for unconventional materials, promote low-cost energy-saving materials, and bridge the gap between materials science, engineering, and construction. Special issues on emerging topics are also published to encourage collaboration between materials scientists, engineers, designers, and fabricators.
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