혼화콘크리트의 비파괴 강도 추정에 관한 연구

A Study on the Estimation of Strength Nondestructive Test of the Admixture Concrete

본 연구는 비파괴 실험을 통해 공시체와 부재 시험체의 코어 공시체를 채취 후, 파괴실험과 비파괴 실험을 실시하여 압축강도의 추정식을 제안한 것으로, 그 결과는 다음과 같다. 혼화콘크리트에 대해 기존의 보통콘크리트 제안식을 적용하면 파괴압축강도와 추정강도간의 오차율이 발생하게 되므로, 본 연구에서는 혼화재 종류 및 시험방법에 따라 다음과 같은 추정식을 제안한다.

This study made member specimen for taking specimen, core with the concrete mixing normal concrete, admixture and conducted the same air curing as field conditions. After performing destructive and nondestructive test by age, estimate expression was suggested by analyzing correlations between compressive strength, rebound number and ultrasonic pulse velocity and the results are as follows. As a result of comparing error rate of existing expressions and this estimation expression, error rate of this estimation is reduced compared to existing expressions and has higher reliability. When conventional concrete expression is applied to admixture concrete, error rate occurs and then this study suggests the estimation expressions depending on types of admixture concrete.