Title :
Measurements of microwave reflection properties of early-age concrete and mortar specimens
Author :
Kwok Chung ; Kharkovsky, Sergey
Author_Institution :
Inst. for Infrastruct. Eng., Univ. of Western Sydney, Sydney, NSW, Australia
Abstract :
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.
Keywords :
aggregates (materials); cements (building materials); concrete; electric admittance; electromagnetic wave reflection; electromechanical effects; microwave measurement; mortar; X-band; cement-based materials; coarse aggregates; conductance; early-age concrete; frequency 8.2 GHz to 12.4 GHz; measurement uncertainties; microwave reflection properties measurements; mortar cubic specimens; physical properties; reflection coefficients; sweeping microwave frequency; water-to-cement ratio; Aggregates; Concrete; Curing; Mortar; Reflection; Reflection coefficient; complex admittance; concrete; conductance; microwave sensor; mortar; reflection coefficient; water-to-cement (w/c) ratio;
Conference_Titel :
Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2014 IEEE International
Conference_Location :
Montevideo
DOI :
10.1109/I2MTC.2014.6860954
