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Evaluation and improvement of pozzolanic activity of andesite for its use in eco-efficient cement

机译：安山岩火山灰活性在生态高效水泥中的应用评价和改进

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摘要

The search for new pozzolan sources for eco-efficient cement manufacture is the main goal of this study, which evaluates the pozzolanic activity of andesitic material existing in large quantities in Algeria. The improvement in the pozzolanic activity of the andesite was also studied by using mechanical and thermal processes. To evaluate the pozzolanic activity of natural and treated andesite, some pozzolanicity tests, namely the Frattini test, the saturated lime test, XRD, TGA and strength activity index, were used. Mortars of blended cements containing CEM I (52.5R and 42.5N) and 0% to 40% of natural or treated andesite were prepared in order to study the pozzolanic performance of andesite blended cement during hardening. The results show that natural andesite has a moderate pozzolanic reactivity enabling blended cements to be developed. Heat treatment at 800 ℃ improved the andesite pozzolanicity but it remained too low in relation to the high cost of the calcination operation. The partial replacement of cement by andesite led to a decrease in the energy needed to produce a ton of binder. From a performance point of view, the energy cost (kW h/MPa) of binders made of andesite is especially interesting when lower performance cements are used.
机译：本研究的主要目的是寻找新的火山灰资源，以生产生态高效的水泥，该火山灰用于评估阿尔及利亚大量存在的安山岩材料的火山灰活性。还通过使用机械和热过程研究了安山岩的火山灰活性的改善。为了评估天然和处理过的安山岩的火山灰活性，使用了一些火山灰性测试，即Frattini测试，饱和石灰测试，XRD，TGA和强度活性指数。制备含CEM I（52.5R和42.5N）和0％至40％的天然或处理过的安山岩的混合水泥砂浆，以研究硬化过程中安山岩混合水泥的火山灰性能。结果表明，天然安山岩具有适度的火山灰反应性，能够开发混合水泥。 800℃的热处理可以改善安山岩的火山灰度，但相对于煅烧操作的高成本，它仍然太低。用安山岩部分替代水泥导致生产一吨粘合剂所需的能量减少。从性能的角度来看，当使用性能较低的水泥时，由安山岩制成的粘合剂的能源成本（kW h / MPa）特别令人关注。

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  • 来源
    《Construction and Building Materials》 |2013年第10期|1268-1277|共10页
  • 作者

    Moussa Hamidi; Larbi Kacimi; Martin Cyr; Pierre Clastres;

  • 作者单位

    Universite de Khemis Miliana W. Ain Defla, Algeria;

    Departement de Chimie, Faculte des Sciences, USTO, Oran, Algeria;

    Universite de Toulouse, UPS, INSA, LMDC (Laboratoire Materiaux et Durabilite des Constructions), 135, Avenue de Rangueil, F-31 077 Toulouse cedex 4, France;

    Universite de Toulouse, UPS, INSA, LMDC (Laboratoire Materiaux et Durabilite des Constructions), 135, Avenue de Rangueil, F-31 077 Toulouse cedex 4, 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

    Andesite; Pozzolana; Pozzolanic activity; Blended cement; Energy consumption;

    机译：安山岩;Pozzolana;火山灰活动;混合水泥能源消耗;

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