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首页> 外文期刊>Magazine of Concrete Research >Effect of autoclave curing on hydration of anhydrite in CFBC fly ash
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Effect of autoclave curing on hydration of anhydrite in CFBC fly ash

机译：高压釜固化对CFBC粉煤灰中硬石膏水合的影响

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摘要

Circulating fluidised bed combustion (CFBC) fly ash contains plenty of anhydrite, so it is important to investigate the hydration behaviour of the anhydrite for the reutilisation of the ash in autoclaved products including autoclaved aerated concrete. X-ray diffraction, scanning electron microscopy and energy-dispersive X-ray spectroscopy were used to study the effect of curing conditions on the hydrates and existence form of the anhydrite in CFBC fly ash-cement clinker pastes. Results show that autoclave curing can significantly limit hydration activity of the anhydrite in CFBC fly ash, and the hydration ability of the autoclaved anhydrite cannot be recovered, even if the anhydrite is submerged in water for the subsequent curing, because it is completely covered by fine hydrates. This work confirms that autoclave curing can effectively limit the expansion of anhydrite in CFBC fly ash, and suggests that CFBC fly ash is suitable to be used for the preparation of autoclaved products.
机译：循环流化床燃烧（CFBC）粉煤灰中含有大量的硬石膏，因此，研究软石膏的水合行为对于灰分再利用高压釜产品（包括高压釜加气混凝土）中的灰分具有重要意义。利用X射线衍射，扫描电子显微镜和能量色散X射线光谱技术研究了固化条件对CFBC粉煤灰水泥熟料浆体中水合物和硬石膏中存在形式的影响。结果表明，高压釜固化可显着限制CFBC粉煤灰中硬石膏的水合活性，即使将硬石膏浸没在水中进行后续固化，高压釜中的硬石膏的水合能力也无法恢复，因为该硬石膏完全被细粉覆盖。水合物。这项工作证实了高压釜的固化可以有效地限制CFBC粉煤灰中硬石膏的膨胀，并表明CFBC粉煤灰适合用于高压釜产品的制备。

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  • 来源
    《Magazine of Concrete Research》 |2015年第2期|1-8|共8页
  • 作者

    Yuanming Song; Chuanchuan Guo; Jueshi Qian; Zhijuan Wang; Zhi Wang;

  • 作者单位

    School of Environmental and Materials Engineering, Yantai University, Yantai City, People's Republic of China;

    School of Environmental and Materials Engineering, Yantai University, Yantai City, People's Republic of China;

    School of Materials Science and Engineering, Chongqing University, Chongqing, People's Republic of China;

    School of Environmental and Materials Engineering, Yantai University, Yantai City, People's Republic of China;

    School of Materials Science and Engineering, Chongqing University, Chongqing, People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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