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Effects of Cr_2O_3 nanopartides on properties of SCC with GGBFS binder

机译：Cr_2O_3纳米粒子对含GGBFS粘结剂的SCC性能的影响

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摘要

Strength assessments and percentage of water absorption of self-compacting concrete containing different amounts of ground granulated blast-furnace slag (GGBFS) and Cr_2O_3 nanopartides as binder were investigated. Portland cement was replaced by different amounts of GGBFS and the properties of the concrete specimens were investigated. GGBFS was found to improve the physical and mechanical properties of concrete up to 45 wt%. Cr_2O_3 nanopartides were added to concrete with the optimum content of GGBFS and the properties of the specimens were measured. Cr_2O_3 nanopartides, as a partial replacement of cement up to 3-0 wt%, could accelerate C-S-H gel formation as a result of increased amounts of crystalline Ca(OH)_2 at an early age of hydration and, hence, increase the strength and improve the resistance to water permeability of concrete specimens. This paper presents several empirical relation ships to predict the flexural and split tensile strengths of the specimens by means of the corresponding compressive strength at a certain age of curing.
机译：研究了含有不同量的颗粒状高炉矿渣（GGBFS）和Cr_2O_3纳米颗粒作为粘结剂的自密实混凝土的强度评估和吸水率。用不同量的GGBFS代替波特兰水泥，并研究了混凝土试样的性能。发现GGBFS可以改善混凝土的物理和机械性能，最高可达45 wt％。 Cr_2O_3纳米颗粒以最佳的GGBFS含量添加到混凝土中，并测量了样品的性能。 Cr_2O_3纳米粒子作为水泥的部分替代品，最多可置换3-0 wt％，由于在水合作用早期增加了结晶Ca（OH）_2的量，因此可以加速CSH凝胶的形成，因此可以提高强度并改善混凝土试件的透水性本文提出了几种经验关系，通过在一定的固化年龄下的相应抗压强度来预测试样的抗弯强度和抗拉强度。

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  • 来源
    《Magazine of Concrete Research》 |2012年第5期|p.433-444|共12页
  • 作者

    Ali Nazari; Shadi Riahi;

  • 作者单位

    Department of Materials Science and Engineering,Saveh Branch, Islamic Azad University, Saveh, Iran;

    Department of Technical and Engineering Sciences, Islamic Azad University, Saveh, Iran;

  • 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
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