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Effect of sediment incorporation on the reactivity of alkali-activated GGBFS systems

机译:沉积物掺入对碱活化GGBFS系统反应性的影响

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摘要

During the last few years, the valorization of marine sediment has been marked by the incorporation of this material in cementitious matrices. Some studies have depicted, more particularly, the use of the sediment in alkaline activation of Ground Granulated Blast Furnace Slag (GGBFS) for Civil Engineering applications. The objective of this work is to understand the effect of clear sediment incorporation on the reactivity of GGBFS alkali-activation. Two alkaline activators are used, a sodium hydroxide solution (NaOH) and a mixture of sodium hydroxide and sodium silicate solution (NaOH + silicate). The influence of sediment incorporation on the reactivity of Alkali-Activated GGBFS (AAS) is determined through X-ray Diffraction XRD, thermogravimetry TG and Solid State Nuclear Magnetic Resonance (NMR) analyses. Results show that the presence of sediment does not modify the structure of the hydration products formed, neither the proportion of Aluminum atoms incorporated into hydrate chains. The substitution of slag by sediment causes a delay in the initiation of alkaline activation particularly in the short term, but this effect diminishes at 28 days.
机译:在过去的几年中,海洋沉积物的算命已经标志着这种材料在水泥基质中。一些研究表明,更具体地,使用沉积物在碱性激活地面粒状高炉渣(GGBF)的土木工程应用中的使用。这项工作的目的是了解透明沉积物掺入对GGBFS碱活化反应性的影响。使用两种碱性活化剂,氢氧化钠溶液(NaOH)和氢氧化钠和硅酸钠溶液(NaOH +硅酸钠)的混合物。通过X射线衍射XRD,热升降机Tg和固态核磁共振(NMR)分析,测定沉积物对碱活化的GGBFS(AAS)反应性的影响。结果表明,沉积物的存在不改变形成的水合产物的结构,均未掺入水合物链中的铝原子的比例。沉积物的替代渣引起含碱活化的延迟,特别是在短期内,但这种效果在28天时降低。

著录项

  • 来源
    《Materials and structures》 |2021年第3期|118.1-118.16|共16页
  • 作者单位

    Centre for Materials and Processes Institut Mines-Télécom IMT Lille Douai 59000 Lille France|Junia ULR 4515 - LGCgE – Laboratoire de Génie Civil et géoEnvironnement Institut Mines-Télécom Univ. Lille Univ. Artois F-59000 Lille France|GERS-LGIE IFSTTAR Univ Gustave Eiffel 44344 Bouguenais France|CNRS Institut des Matériaux Jean Rouxel Université de Nantes IMN 44000 Nantes France;

    CNRS Institut des Matériaux Jean Rouxel Université de Nantes IMN 44000 Nantes France;

    GERS-LGIE IFSTTAR Univ Gustave Eiffel 44344 Bouguenais France|CNRS Institut des Matériaux Jean Rouxel Université de Nantes IMN 44000 Nantes France;

    ECOCEM Materials 4 place Louis Armand 75012 Paris France;

    LMDC INSA UPS Génie Civil Université de Toulouse 135 Avenue de Rangueil 31077 Toulouse Cedex 04 France;

    Centre for Materials and Processes Institut Mines-Télécom IMT Lille Douai 59000 Lille France|Junia ULR 4515 - LGCgE – Laboratoire de Génie Civil et géoEnvironnement Institut Mines-Télécom Univ. Lille Univ. Artois F-59000 Lille France;

  • 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

    Alkali-activated GGBFS; Sediment; TG; NMR; XRD;

    机译:碱活化的GGBF;沉积物;TG;NMR;XRD;

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