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Synergetic effect of a chemical activator and blast-furnace slag on enhancing recycled aggregate mortar

机译:化学活化剂和高炉矿渣对增强再生骨料砂浆的协同作用

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摘要

The inferiority of recycled fine aggregate mortar (RFAM) is a major obstacle to its utilisation and a method to enhance RFAM is thus necessary to scale up applications. The concept behind the method proposed in this paper involves using a calcium hydroxide solution to pre-coat the surface of recycled fine aggregates in order to activate blast-furnace slag incorporated in RFAM to enhance performance. The results of this experimental research showed that, compared with conventional RFAM, the synergistic effects of using a calcium hydroxide solution and blast-furnace slag in RFAM produced better workability, earlier setting time, higher compressive strength at early and later ages, higher flexural and splitting tensile strengths, a lower volume of permeable voids, a greater formation of hydration products, a lower water absorption by immersion and a lower rate of capillary absorption. The method was found to enhance the performance of RFAM remarkably and, in addition, is economically and environmentally feasible.
机译:再生细骨料砂浆(RFAM)的劣质性是其利用的主要障碍,因此有必要采用增强RFAM的方法来扩大应用范围。本文提出的方法背后的概念涉及使用氢氧化钙溶液对再生细骨料的表面进行预涂层,以激活RFAM中掺入的高炉矿渣以增强性能。实验研究的结果表明,与传统的RFAM相比,在RFAM中使用氢氧化钙溶液和高炉矿渣的协同作用产生了更好的可加工性,更早的凝固时间,更高的早期和后期抗压强度,更高的抗弯强度和抗弯强度。断裂抗张强度,较低的可渗透空隙体积,较大的水合产物形成,较低的浸渍吸水率和较低的毛细管吸收率。发现该方法显着增强了RFAM的性能,此外,该方法在经济和环境上都是可行的。

著录项

  • 来源
    《Magazine of Concrete Research》 |2020年第10期|471-485|共15页
  • 作者

  • 作者单位

    CSIR Cent Bldg Res Inst Environm Sci & Technol Div Roorkee Uttar Pradesh India|Acad Sci & Innovat Res AcSIR Ghaziabad India;

  • 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

    aggregates; cement paste; mortar;

    机译:骨料水泥浆砂浆;

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