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석회암 골재를 사용한 콘크리트에 대한 비파괴 강도 평가연구
오병환 ( Oh¸ Byung-hwan ),강의영 ( Jiang¸ Yi-rong ),인광진 ( In¸ Kwang-jin ),김지철 ( Kim¸ Ji-cheol ),이승석 ( Lee¸ Seung-suk ) 한국구조물진단유지관리공학회 2000 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.4 No.2
The non-destructive tests are widely used to predict the strength of existing structures. However, the current prediction equations give no satisfactory results when the aggregate, water to cement ratio, ages of concrete are different. The purpose of the present study is to propose the prediction equations for strength evaluation of concrete with limestone aggregate focusing on the rebound method and ultrasonic pulse velocity method. The major test variables include water to cement ratio and curing methods. The water to cement ratios are 0.3, 0.4, 0.5, 0.6, 0.7 respectively and the curing methods cover air-dry condition and standard curing condition. The present study indicates that the test data and the proposed equations agree well with each other.