Advances in characterizing and understanding the microstructure of cementitious materials
Advances in characterizing and understanding the microstructure of cementitious materials
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DOI：
10.1016/j.cemconres.2019.105806
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发表时间：
2019-10-01
影响因子：
11.4
通讯作者：
Qomi, Mohammad Javad Abdolhosseini
中科院分区：
文献类型：
--
作者：
Monteiro, Paulo J. M.;Geng, Guoqing;Qomi, Mohammad Javad Abdolhosseini
综述了显微组织表征方法的研究进展。特别注意的是先进的探头，如X射线成像和光谱，H-1 NMR弛豫，原位和高压X射线衍射，和数字全息显微镜。显微断层摄影已经成为一种成熟的技术，纳米摄影已经显著提高了其空间分辨率，特别是使用重叠关联摄影。审查还讨论了混凝土的微观结构上的增塑剂的效果，并提出了一个关键的分析有机外加剂如何影响从纯合成饱和溶液中获得的水合物，从更现实的水合系统。纳米材料的加入改变了胶凝体系的微观结构，因此对近年来的研究进行了综述。重要的是要整合的令人印象深刻的进展，在表征的微（纳米）结构与努力开发现实的模型。因此，目前的工作给出了一个简短的，但关键的物理化学方法，旨在链接的化学成分，纹理和微观结构的水泥水合物的介绍。
Progress in microstructural characterization methods is summarized. Special attention is given to advanced probes, such as X-ray imaging and spectroscopy, H-1 NMR relaxometry, in-situ and high-pressure X-ray diffraction, and digital holographic microscopy. Microtomography has become a mature technique and nanotography has improved its spatial resolution significantly, particularly with the use of ptychography. The review also discusses the effect of plasticizers on the microstructure of concrete and presents a critical analysis of how organic admixtures affects the hydrates obtained from pure synthesis in saturated solutions and from more realistic hydrating systems. The addition of nanomaterials into cementitious systems modifies the microstructure of the matrix so a summary of recent research is presented. It is important to integrate the impressive progress in the characterization of the micro(nano)structure with efforts developing realistic models. Therefore, the present work gives a short but critical presentation of physical chemistry approaches that aim to link the chemical composition, texture, and microstructure of the cement hydrates.