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.

中文翻译：

---

一种通过飞行时间二次离子质谱分析了解和定量 C-S-H 中硅酸盐四面体的新方法


胶凝材料的性能在很大程度上取决于水合硅酸钙 （CSH）。在这项工作中，提出了具有高分辨率的飞行时间二次离子质谱 （TOF-SIMS） 来定量测定特定微米区域中 C-S-H 的硅酸盐四面体含量。建立了一个 CSH 数据库，其中局部水合物中的硅酸盐含量通过离子强度进行量化，用于 TOF-SIMS 分析。结果表明，在 C-S-H 的分解中可检测到 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功能关系。提出了定量方程来计算各种铝石水合物的 Qn 结构含量。基于 TOF-SIMS 定量结果，成功构建了在对照和预压样品中分配缺陷的硅酸盐结构。