Assement of setting times of cement mortar with different ratio of sand using Electro-mechanical impedance sensing technique

EMI 센싱 기법을 이용한 잔골재 혼합비에 따른 모르타르의 응결특성

The electro-mechanical impedance(EMI) behavior of piezoelectric sensor embedded in cement mortar was investigated to assess the setting times. EMI signal was continuously measured for 12 hours by the PZT sensor embedded in cement mortar with different ratio of sand. As a result, the setting times by the penetration resistance test were accelerated as the sand ratio increased. However, the setting times by EMI sensing technique were delayed as the sand ratio increased.