[1131] ELECTRICAL RESISTANCE MEASUREMENT TO ASSESS MOISTURE TRANSFER IN CEMENT-BASED MORTAR THROUGH WATER ABSORBING AND DRYING PROCESSES
Keywords:cement-based mortar, electrical resistance, internal relative humidity, moisture transfer
Based on calibration specimens, internal relative humidity (IRH) and moisture transfer (MT) in cement-based mortar through water absorbing and drying processes were assessed by measuring electrical resistance using stainless steel rods placed at intervals of 4 mm in the specimens. As a result, for cement-based mortar exposed to water, the initial change in IRH could be mainly caused by the penetration of liquid water and after wetness boundary, IRH increased gradually due to diffusion of water vapor. Meanwhile, IRH of cement-based mortar exposed to dried decreased gradually with time.