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Argon broad ion beam sectioning and high resolution scanning electron microscopy imaging of hydrated alite
Cement and Concrete Research ( IF 11.4 ) Pub Date : 2021-09-09 , DOI: 10.1016/j.cemconres.2021.106583
Florian Kleiner 1 , Christian Matthes 1 , Christiane Rößler 1
Affiliation  

Scanning electron microscopy (SEM) imaging is able to visualize micro- to nano-structures of cement and concrete. A prerequisite is that the sample preparation preserves the native structure of the specimen. In this study, argon broad ion beam (BIB) sectioning is compared to state-of-the-art sample preparation (resin embedding, polishing) for hydrated alite. Additionally, it is investigated if during BIB, sample cooling is beneficial to avoid deterioration of cement hydrates. The aim is to quantitatively measure pore size distributions in hardened alite pastes.

Therefore, not only optimized sample preparation but also optimized imaging conditions are investigated. Finally, it is demonstrated that by image analysis pores down to a diameter of 5 nm in hydrated alite pastes can be quantitatively analysed.



中文翻译:

水合阿利特的氩宽离子束切片和高分辨率扫描电子显微镜成像

扫描电子显微镜 (SEM) 成像能够可视化水泥和混凝土的微米到纳米结构。先决条件是样品制备保留了样品的天然结构。在本研究中,将氩宽离子束 (BIB) 切片与水合 alite 的最先进样品制备(树脂嵌入、抛光)进行了比较。此外,还研究了在 BIB 期间,样品冷却是否有利于避免水泥水合物变质。目的是定量测量硬化的 alite 糊剂中的孔径分布。

因此,不仅要研究优化的样品制备,还要研究优化的成像条件。最后,证明了通过图像分析可以定量分析水合 alite 糊剂中直径低至 5 nm 的孔。

更新日期:2021-09-09
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