A study of the influence of crystal component on the reactivity of low-calcium fly ash in alkaline conditions based on SEM-EDS
A study of the influence of crystal component on the reactivity of low-calcium fly ash in alkaline conditions based on SEM-EDS
复制标题
基于SEM-EDS研究碱性条件下晶体组分对低钙粉煤灰反应活性的影响
DOI：
10.1016/j.conbuildmat.2020.118227
复制
发表时间：
2020
影响因子：
7.4
通讯作者：
Gu Rui
中科院分区：
文献类型：
--
作者：
Wang Tiao;Ishida Tetsuya;Gu Rui
近几十年来，世界各地越来越多地使用飞灰来改善混凝土性能。然而，由于其非均质性和多变性，限制了其在工程上的应用。本文提出了一种基于扫描电子显微镜-能量色散X射线能谱全元素图谱与图像分析相结合的综合表征飞灰材料性质的方法。可以直观地分析和量化每一相的化学成分、矿物学和非晶相组合以及比表面积。分析表明，飞灰的相组成受其燃烧条件的影响。虽然在飞灰颗粒中可以发现广泛分布的结晶莫来石，但结晶石英通常被无定形硅酸盐覆盖。利用本研究开发的表征方法，研究了在碱性条件下，晶体组成对飞灰各相动力学性质的影响。结果表明，晶态莫来石对铝硅酸盐玻璃及玻璃-莫来石混合物的动力学性能有影响。
The use of fly ash to improve concrete performance has increased around the world in recent decades. However, the engineering application of fly ash remains limited by its heterogeneity and variability. This paper presents a developed approach for comprehensive characterisation of fly ash material properties based on scanning electron microscopy–energy-dispersive X-ray spectroscopy full-element mapping with image analysis. The chemical compositions, mineralogical and amorphous phase assemblage and specific surface area of each phase can be visually analysed and quantified. Analysis reveals that the phase assemblage of fly ash is affected by its combustion conditions. Although a wide distribution of crystalline mullite can be found in fly ash particles, crystalline quartz is usually covered by amorphous silicate. The characterisation approach developed in this study is used to investigate the influence of crystal components on kinetic properties of various phases of fly ash in alkaline conditions. The results show that crystalline mullite affects the kinetic properties of Al-silicate glass and glass-mullite intermixtures.
影响因子：
11.4
作者：
Tiao Wang;T. Ishida
通讯作者：
Tiao Wang;T. Ishida
飞灰 ASR 抑制效果特征的 SEM-EDS/EBSD 分析
影响因子：
7.4
作者：
晴香 高橋;一夫 山田
通讯作者：
一夫 山田
通过 SEM 图像测量岩石的模态矿物学：使用 Multispec© 和 ImageJ 免费软件
DOI：
--
发表时间：
2005
期刊：
影响因子：
--
作者：
J. Lydon
通讯作者：
J. Lydon