...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Magazine of Concrete Research >X-ray spectromicroscopic study of interactions between NaCl and calcium silicate hydrates
【24h】

X-ray spectromicroscopic study of interactions between NaCl and calcium silicate hydrates

机译：X射线光谱学研究NaCl与水合硅酸钙之间的相互作用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

X-ray diffraction (XRD), scanning transmission X-ray microscopy (STXM) and X-ray absorption near edge structure (XANES) spectra were used to investigate the interactions between sodium chloride (NaCl) and calcium silicate hydrate (C-S-H), the primary binding phase of hydrated Portland cement. XRD analysis indicates the interlayer expansion of C-S-H with a high Ca/Si ratio. Contrast maps of STXM images collected from C-S-Hs with different Ca/Si ratios reacted with NaCl solution reveal that sodium interacts with C-S-H with a low Ca/Si ratio, while chloride is intercalated into the interlayer of C-S-H with a high Ca/Si ratio. Silicon K-edge XANES spectra were analysed to understand the variation in the structure of silicate chains. This revealed that the interaction with the sodium cations depolymerises the silicate chains of C-S-H with a low Ca/Si ratio. The mechanism involved for the selection of adsorbed ions is probably due to the residual charge between the positive charge of interlayer calcium ions and the negative charge of the end group of silicate chains in C-S-H.
机译：X射线衍射（XRD），扫描透射X射线显微镜（STXM）和X射线吸收近边缘结构（XANES）光谱用于研究氯化钠（NaCl）与水合硅酸钙（CSH）之间的相互作用。水合硅酸盐水泥的初级粘结相。 XRD分析表明具有高Ca / Si比的C-S-H的层间膨胀。从具有不同Ca / Si比的CS-Hs与NaCl溶液反应中收集的STXM图像的对比图显示，钠与低Ca / Si比的CSH相互作用，而氯化物插入高Ca / Si比的CSH层间。分析了硅K边缘XANES光谱，以了解硅酸盐链结构的变化。这表明与钠阳离子的相互作用使具有低Ca / Si比的C-S-H的硅酸盐链解聚。选择吸附离子的机理可能是由于C-S-H中层间钙离子的正电荷与硅酸盐链端基的负电荷之间的残留电荷。

著录项

  • 来源
    《Magazine of Concrete Research》 |2014年第4期|141-149|共9页
  • 作者

    Seyoon Yoon; Juyoung Ha; Sejung Rosie Chae; David A. Kilcoyne; Paulo J. M. Monteiro;

  • 作者单位

    School of Engineering, Kings College, University of Aberdeen, Aberdeen, UK;

    Department of Environmental Sciences, Rutgers University, New Brunswick, NJ, USA;

    Department of Civil and Environmental Engineering, University of California, Berkeley, CA, USA;

    Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, USA;

    Department of Civil and Environmental Engineering, University of California, Berkeley, CA, USA;

  • 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
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号