Abstract
A concrete fill monitor has been newly developed utilizing the electric conductivity of concrete. A measurement electrode is placed at a location where concrete must be filled and a reference electrode is placed nearby in fresh concrete confirmed to be filled. Low voltage is applied to the electrodes, proper fill is confirmed when the resistance value of the measurement electrode matches that of the reference electrode. The basic experiments for development of this system and examples of application in RC containment vessel construction work and precast concrete members production are reported.
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