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首页> 外文期刊>Materials and structures >NMR, XRD, IR and synchrotron NEXAFS spectroscopic studies of OPC and OPC/slag cement paste hydrates
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NMR, XRD, IR and synchrotron NEXAFS spectroscopic studies of OPC and OPC/slag cement paste hydrates

机译:OPC和OPC /矿渣水泥浆水合物的NMR,XRD,IR和同步加速器NEXAFS光谱研究

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摘要

This work aims to determine the fundamental similarities and/or differences between OPC and OPC/slag paste hydrates. OPC and 35% slag pastes are investigated using five techniques: ~(29)Si NMR, ~(27)A1 NMR, X-ray diffraction (XRD), infrared (IR) and synchrotron near edge X-ray absorption fine structure (NEXAFS) spectroscopy. ~(29)Si NMR provides valuable information related to the formation of the C-S-H gel, the main hydrated phase of the cement paste. ~(27)A1 NMR is a useful tool to characterize calcium aluminates and aluminate hydrates such as ettringite and monosulphate hydrate. XRD identifies polycrystalline phases of the hardened cement paste, including ettringite, monosulphate and CaOH_2. Vibrational frequencies in IR assist in identifying the silicate, sulphate and carbonate phases of the cement paste. As far as we are aware, Si K-edge NEXAFS has never been applied in cement research and its advantages and disadvantages are discussed. Using these techniques, a comparison between OPC and 35% slag paste hydrates is made, shedding light on differences in the amount and form of hydrated phases present, especially the absence of ettringite in the 35% slag paste.
机译:这项工作旨在确定OPC和OPC /矿渣糊水合物之间的基本相似性和/或差异。使用五种技术研究了OPC和35%的渣浆:〜(29)Si NMR,〜(27)Al NMR,X射线衍射(XRD),红外(IR)和同步加速器近边缘X射线吸收精细结构(NEXAFS )光谱学。 〜(29)Si NMR提供了与C-S-H凝胶(水泥浆的主要水合相)的形成有关的有价值的信息。 〜(27)Al NMR是表征铝酸钙和铝酸盐水合物(如钙矾石和单硫酸盐水合物)的有用工具。 XRD可以识别硬化水泥浆的多晶相,包括钙矾石,单硫酸盐和CaOH_2。 IR中的振动频率有助于识别水泥浆的硅酸盐,硫酸盐和碳酸盐相。据我们所知,Si K-edge NEXAFS从未在水泥研究中得到应用,并且讨论了其优缺点。使用这些技术,可以对OPC和35%的矿渣糊水合物进行比较,以阐明存在的水合相的数量和形式的差异,尤其是35%的矿渣糊中不存在钙矾石。

著录项

  • 来源
    《Materials and structures》 |2011年第10期|p.1773-1791|共19页
  • 作者单位

    Department of Civil Engineering, Monash University, Wellington Road, Clayton, VIC 3800, Australia;

    Department of Civil Engineering, Monash University, Wellington Road, Clayton, VIC 3800, Australia;

    Department of Civil Engineering, Monash University, Wellington Road, Clayton, VIC 3800, Australia;

    Department of Civil Engineering, Monash University, Wellington Road, Clayton, VIC 3800, Australia;

  • 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

    cement; slag; paste hydrates; NMR; XRD; IR;

    机译:水泥;矿渣;粘贴水合物;NMR;XRD;红外;

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