早期混凝土和砂浆试样微波反射特性的测量

2014 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Proceedings Pub Date : 2014-05-12 DOI:10.1109/I2MTC.2014.6860954

K. Chung, S. Kharkovsky

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引用次数: 7

摘要

本文介绍了混凝土和砂浆立方体试件反射特性的测量和监测结果。结果是通过在整个x波段(8.2 - 12.4 GHz)使用扫描微波频率获得的。论证了反射系数和电导对水灰比和粗集料影响的依赖关系。结果表明，混凝土和砂浆试件的反射系数幅值随时间的衰减速率不同。讨论了测量不确定度产生的原因和影响。本文还讨论了研究结果在水泥基材料物理性能测定中的预期应用。

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Measurements of microwave reflection properties of early-age concrete and mortar specimens

Measurement and monitoring results on reflection properties of concrete and mortar cubic specimens are presented in this paper. The results were obtained by using a sweeping microwave frequency over entire X-band (8.2 - 12.4 GHz). Dependencies of the reflection coefficient and conductance on water-to-cement ratio and effect of coarse aggregates in the specimens are demonstrated. It is shown that the decays on magnitudes of reflection coefficients of concrete and mortar specimens have different rates versus days. The causes and effects of measurement uncertainties are discussed. The expected applications of the results for the determination of physical properties of cement-based materials are also discussed.

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2014 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Proceedings

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