• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Clay sediment geopolymerization by means of alkali metal aluminate activation
【24h】

Clay sediment geopolymerization by means of alkali metal aluminate activation

机译：借助碱金属铝酸盐活化进行粘土沉积物的地质聚合

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

In this work a clay sediment from a reservoir was employed for the synthesis of geopolymers. The sediment was calcined at 650 and 750 degrees C for 1 h to ensure the conversion of aluminium coordination from octahedral to tetrahedral. The sediment was characterized by means of X-ray fluorescence, X-ray diffraction, thermogravimetry, mercury intrusion porosimetry and scanning electron microscopy. After calcination, the sediment was submitted to X-ray diffraction, mercury intrusion porosimetry and scanning electron microscopy. Strongly alkaline sodium and potassium aluminate solutions were used to start the polycondensation reaction responsible for geopolymer formation. The initial alkali metal hydroxide concentrations of these solutions were 17, 15 (only Na), 13, 11 and 8.5 M. Polycondensation was carried out at 60 degrees C for times ranging from 15 min to 28 d. The geopolymer products obtained in all the experimental conditions tested were submitted to the quantitative determination of the extent of polycondensation through mass increase and loss on ignition, as well as to qualitative characterization by means of FT-IR spectroscopy. A reduced set of samples activated with solutions corresponding to initial [NaOH] 13 M and [KOH] 11 M and cured at 60 degrees C for 3 and 14 d were used for the determination of apparent density and unconfined compressive strength. These samples were also characterized by means of mercury intrusion porosimetry and scanning electron microscopy. The results have indicated that the development of preformed building materials starting from reservoir sediment, although requiring accurate mix design, can be possible by means of alkali metal aluminate activation.
机译：在这项工作中，来自储层的粘土沉积物被用于合成地质聚合物。沉积物在650和750摄氏度下煅烧1 h，以确保铝配位体从八面体转化为四面体。通过X射线荧光，X射线衍射，热重分析，压汞法和扫描电子显微镜对沉积物进行表征。煅烧后，将沉积物进行X射线衍射，压汞法和扫描电镜观察。使用强碱性的铝酸钠和铝酸钾溶液开始负责地聚物形成的缩聚反应。这些溶液的初始碱金属氢氧化物浓度为17、15（仅Na），13、11和8.5M。缩聚反应在60摄氏度下进行15分钟至28天。在所有测试的实验条件下获得的地质聚合物产品都将通过质量增加和灼烧损失进行定量确定缩聚程度，并通过FT-IR光谱进行定性表征。使用由对应于初始[NaOH] 13 M和[KOH] 11 M的溶液活化并在60摄氏度下固化3和14 d的一组减少的样品来确定表观密度和无侧限抗压强度。还通过压汞法和扫描电子显微镜对这些样品进行了表征。结果表明，尽管需要精确的混合设计，但从储层沉积物开始的预制建筑材料的开发仍可以通过碱金属铝酸盐的活化来实现。

著录项

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