관입시험법에 의한 콘크리트 압축강도 추정식의 제안에 관한 연구

A New Proposal for the Estimated Equation of Concrete Strength by Penetration Test

This study aims to propose the new strength equation of concrete by penetration test. There are not only few estimate strength equation of concrete, but also many problems to apply them to the real structure because of speed, cost, easiness, structual damage, reliability and so on. For this study, there performed a series of test and proposed a strength equation as follows ; fc = 5661 - 219.5d ＋ $2.17d^2 (단, R^2 = 98.6%$) fc : estimated compressive strength of concrete by kgf/$cm^2$ d: penetrated depth of concrete by mm.