使用智能集料的混凝土和砂浆试件养护状态监测

2014 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Proceedings Pub Date : 2014-05-12 DOI:10.1109/I2MTC.2014.6860757

K. Chung, S. Kharkovsky, Qingzhao Kong, G. Song

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引用次数: 7

摘要

本文对早期混凝土和砂浆板试件应力波透射特性的测量进行了试验研究。这项研究是通过嵌入式压电传感器实现的，这种传感器被称为“智能聚合体(SAs)”，它在100hz - 150khz的频率范围内产生和接收扫描正弦应力波。论证了作为透射能指标的功率谱密度共振峰幅值和频率对试件水灰比(w/c)和粗集料影响的依赖关系。结果表明，在水化过程中，不同w/c比的混凝土和砂浆试件的共振峰变化速率不同。讨论了基于sa的固化状态监测方法在早期混凝土评估中的潜力。

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Cure-state monitoring of concrete and mortar specimens using Smart Aggregates

This paper experimentally studies the measurement of stress wave transmission properties in early-age concrete and mortar slab specimens. The studies are enabled by embedded piezoelectric-based transducers called “Smart Aggregates (SAs)” that generated and received a swept sine stress wave in the specimens at frequency range of 100 Hz - 150 kHz. Dependencies of the resonant peak amplitude and frequency of power spectrum density as transmission energy indicator on water-to-cement (w/c) ratio and effect of coarse aggregates in the specimens are demonstrated. It is shown that the changes of the resonant resonance peak have different rates for the concrete and mortar specimens with different w/c ratios when the hydration process proceeded. The potential of SA-based cure-state monitoring method for very early-age concrete assessment is discussed.

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

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