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Influence of calcium content on structure and strength of MSWI bottom ash-based geopolymer

机译：钙含量对MSWI底灰基地质聚合物结构和强度的影响

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摘要

This study explored the strength limitations of municipal solid waste incineration (MSWI) bottom ash-based geopolymer, which can limit its use in building materials. The calcium content in MSWI bottom ash was increased by the addition of varying amounts of granulated blast furnace slag (GBFS) and calcium-containing chemicals. The results showed that the low calcium content of MSWI bottom ash in geopolymer was the main cause of insufficient polymerisation. Both GBFS and calcium-containing chemicals improved geopolymer microstructure and enhanced the degree of polymerisation, which clearly improved the compressive strength. However, further increases in geopolymer compressive strength were not significant when the GBFS content was greater than 40%, and the compressive strength decreased sharply when hydrated Ca(OH)(2) content was greater than 5%.
机译：这项研究探讨了城市固体废物焚烧（MSWI）基于灰烬的地聚合物的强度限制，这可能会限制其在建筑材料中的使用。通过添加不同量的粒状高炉矿渣（GBFS）和含钙化学品，增加了MSWI底灰中的钙含量。结果表明，地聚合物中MSWI底灰的钙含量低是聚合不足的主要原因。 GBFS和含钙化学品均改善了地聚合物的微观结构并增强了聚合度，从而明显提高了抗压强度。但是，当GBFS含量大于40％时，地聚合物的抗压强度的进一步提高并不明显，而当水合Ca（OH）（2）含量大于5％时，抗压强度会急剧下降。

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  • 来源
    《Magazine of Concrete Research》 |2019年第8期|362-372|共11页
  • 作者

    Huang Guodong; Ji Yongsheng; Zhang Linglei; Hou Zhihui; Zhang Li; Wu Shourong;

  • 作者单位

    China Univ Min & Technol, Xuzhou, Jiangsu, Peoples R China|Anhui Univ Sci & Technol, Huainan, Anhui, Peoples R China;

    State Key Lab Geomech & Deep Underground Engn, Xuzhou, Jiangsu, Peoples R China;

    China Univ Min & Technol, Sch Mech & Civil Engn, Xuzhou, Jiangsu, Peoples R China;

    China Univ Min & Technol, Sch Mech & Civil Engn, Xuzhou, Jiangsu, Peoples R China;

    China Univ Min & Technol, Sch Mech & Civil Engn, Xuzhou, Jiangsu, Peoples R China;

    China Univ Min & Technol, Sch Mech & Civil Engn, Xuzhou, Jiangsu, Peoples R 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
  • 中图分类
  • 关键词

    chemical properties; composite materials; compressive strength;

    机译：化学性能;复合材料;抗压强度;

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