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首页> 外文期刊>Magazine of Concrete Research >Dynamic splitting-tensile testing of highly fluidised geopolymer concrete
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Dynamic splitting-tensile testing of highly fluidised geopolymer concrete

机译：高流态化土聚合物混凝土的动态劈裂拉伸试验

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摘要

Slag and fly ash were used in the fabrication of geopolymer concrete (GC). NaOH and Na_2CO_3 were used for slag and fly ash activation, and then highly fluidised C30 GC was prepared. Dynamic splitting-tensile tests were conducted using the ○100 mm split Hopkinson pressure bar apparatus improved by the pulse shaper technique. The dynamic splitting-tensile mechanical properties of GC, including strength, deformation and energy dissipation, were then studied. In addition, the mechanism of the dynamic properties of the GC was analysed. The results indicate that dynamic splitting-tensile mechanical properties of GC exhibit a strong strain rate dependency. Strength and deformation increase approximately linearly with the logarithm of the average strain rate and, from an energy perspective, the correlation between energy dissipation and average incident pulse energy rate is obvious, the equation following a binomial curve; for GC, the strain rate sensitivity threshold is 5·027 s~(-1). This research on dynamic splitting-tensile testing thus adds to a comprehensive understanding of the mechanical characteristics system of GC.
机译：矿渣和粉煤灰用于制造地聚合物混凝土（GC）。使用NaOH和Na_2CO_3进行炉渣和粉煤灰的活化，然后制备高度流化的C30 GC。使用通过脉冲整形器技术改进的○100 mm分体式Hopkinson压力棒设备进行了动态分体拉伸试验。然后研究了气相色谱的动态断裂拉伸力学性能，包括强度，变形和能量耗散。另外，分析了气相色谱动力学性质的机理。结果表明，GC的动态裂变拉伸力学性能表现出很强的应变率依赖性。强度和变形随平均应变率的对数近似线性增加，从能量的角度来看，能量耗散与平均入射脉冲能量率之间的相关性很明显，该方程遵循二项式曲线；对于GC，应变速率敏感度阈值为5·027 s〜（-1）。因此，对动态裂口拉伸试验的这项研究增加了对GC力学特性系统的全面了解。

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  • 来源
    《Magazine of Concrete Research》 |2013年第14期|837-843|共7页
  • 作者

    Xin Luo; Jin-yu Xu;

  • 作者单位

    Department of Airfield and Building Engineering, Air Force Engineering University, Xi'an, China;

    Department of Airfield and Building Engineering, Air Force Engineering University, Xi'an, China College of Mechanics and Civil Architecture, Northwest Polytechnic University, Xi'an, 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
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