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http://dx.doi.org/10.5345/JKIBC.2016.16.5.389

Setting Characteristic Assessment of Cementitious Materials using Piezoelectric Sensor  

Lee, Chang Joon (Department of Architectural Engineering, Chungbuk National University)
Lee, Jun Cheol (School of Architecture and Civil Engineering, Kyungpook National University)
Shin, Sung Woo (Department of Safety and Engnieering, Pukyung National University)
Kim, Wha Jung (School of Architecture and Civil Engineering, Kyungpook National University)
Publication Information
Journal of the Korea Institute of Building Construction / v.16, no.5, 2016 , pp. 389-395 More about this Journal
Abstract
The evolution of electro-mechanical impedance (EMI) of the piezoelectricity (PZT) sensor was investigated to determine the setting times of cementitious materials in this study. The PZT sensor coated with non-conductive acrylic resin was embedded in cement paste before casting and the EMI signatures were continuously measured. Vicat needle test and semi-adiabatic calorimetry test were also conducted to justify the validity of EMI senssing technique in setting monitoring of cementitious materials. The results show that significant changes in EMI resonant peak magnitude and frequency during setting process were observed, and that the setting times determined by EMI sensing technique were relevant to the setting times measured by Vicat needle test and semi-adiabatic calorimetry test.
Keywords
setting; electro-mechanical impedance; piezoelectric sensor; cementitious material;
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