A Study on Measuring and Calibration Method using Time Domain Reflectometry Sensor under Road Pavement

The research presents moisture content measuring and calibration method of road pavement, especially asphalt concrete pavement for performance evaluation or remaining life prediction using Time Domain Reflectometry(TDR) sensor, CS616 made by campbell INC. Before calibration test of CS616, accomplished a sensor verification tests. Verification test items were covering depth and interference effect of two CS616 sensors, temperature effects between and compaction ratio effects. Covering depth and interference effects between two CS616 sensors were just small and the effects of temperature and compaction ratio effected a Volumetric Moisture Contents at under disregard appeared with the fact that was possible. Also, obtained the calibration equation of the subgrade and subbase course, showed above of all 0.9.