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Investigations about the influence of fine additives on the viscosity of cement paste for self-compacting concrete

机译：精细添加剂对自密实混凝土水泥浆粘度影响的研究

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摘要

In this work, the effect of fine additives (limestone, silica fume, fly ash, pozzolan, nano-silica fume) on the plastic viscosity of cement paste is being investigated. Towards this direction, twenty-four samples were designed and produced. Those pastes consisted mainly of cement (type CEM I 42.5) and specific proportions of one or two fine additives. Plastic viscosity and yield stress were measured, as well as micro-structure of selected 28-days hardened samples was studied through means of mercury porosimetry. Results showed that limestone (40%) can improve the rheological behavior of cement pastes, and the synergy of limestone (20%) and fly ash (20%) can lead to higher packing density. Cement pastes that combine those two characteristics, could serve as the base for self-compacting concrete (SCC) production.
机译：在这项工作中，正在研究精细添加剂（石灰石，硅粉，粉煤灰，火山灰，纳米硅粉）对水泥浆的塑性粘度的影响。朝这个方向，设计并生产了24个样品。这些浆料主要由水泥（CEM I 42.5型）和特定比例的一种或两种精细添加剂组成。测量了塑料粘度和屈服应力，并通过水银孔率法研究了所选28天硬化样品的微观结构。结果表明，石灰石（40％）可以改善水泥浆的流变性，而石灰石（20％）和粉煤灰（20％）的协同作用可以提高堆积密度。结合了这两个特性的水泥浆可作为自密实混凝土（SCC）生产的基础。

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  • 来源
    《Construction and Building Materials》 |2010年第8期|p.1518-1522|共5页
  • 作者

    N. Diamantonis; I. Marinos; M.S. Katsiotis; A. Sakellariou; A. Papathanasiou; V. Kaloidas; M. Katsioti;

  • 作者单位

    School of Chemical Engineering, NTUA 9, Heroon Polytechniou Street. 157 73 Athens, Greece;

    rnHeracles General Cement Company, 49-51 Soph. Venizelou Street, 141 23 Lycovrissi, Attica, Greece;

    rnSchool of Chemical Engineering, NTUA 9, Heroon Polytechniou Street. 157 73 Athens, Greece;

    rnPublic Power Corporation/Testing Research and Standards Center, Attica, Greece;

    rnPublic Power Corporation/Testing Research and Standards Center, Attica, Greece;

    rnHellenic Cement Research Center Ltd., Heracles Group, 15 K. Pateli, 141 23 Lycovrissi, Attica, Greece;

    rnSchool of Chemical Engineering, NTUA 9, Heroon Polytechniou Street. 157 73 Athens, Greece;

  • 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

    fine additives; cement paste; plastic viscosity; self-compacting concrete; pore size distribution;

    机译：精细添加剂;水泥浆塑性粘度自密实混凝土;孔径分布;

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