Determination of Moisture Content in Mortar at Near Relaxation Frequency 17 GHz

作者：Jusoh M A^*; Abbas Z; Lee K Y; You K Y; Norimi A M

来源：Measurement Science Review, 2011, 11(6): 203-206.

DOI：10.2478/v10048-011-0031-0

• Mortar
• attenuation
• moisture content
• nondestructive technique (NDT)
• free space
• transmission

The knowledge of moisture content in cement based material is important especially for the safety in field work. In this paper, a non-destructive and contactless free space method is used for measurement of moisture content in cement based materials (mortar) at microwave frequencies. The measurement system consists of a 17 GHz dielectric resonator oscillator (DRO) as a microwave source, a Power Meter as the detector, and a pair of lens horn antennas to transmit and receive the microwave signal. An empirical formula of moisture content was obtained by using a relationship between attenuation and moisture content. This model is best for prediction of moisture content greater than 2% with percentage mean error of 3%.

• 出版日期2011