|
Title |
Estimation of Aging Effects on Determination of Compressive Strength of Concrete by Non-Destructive Tests
|
|
Authors |
김민수 ; 윤영호 ; 김진근 ; 권영웅 ; 이승석 |
|
Keywords |
비파괴 시험; 반발도법; 초음파 속도법; 강도감소계수; 반발도증가계수; compressive strength; non-destructive test; rebound number; ultrasonic pulse velocity; age coefficient |
|
Abstract |
Several non-destructive test methods have been developed to estimate compressive strength of concrete in other countries. However, their applications are limited in domestic concrete due to their inaccuracies. The purpose of this study is to propose an aging coefficient of compressive strength of structural concrete in rebound number method and ultrasonic pulse velocity method for domestic concrete. The test variables include type of aggregate, curing condition, and compressive strength. Two approaches are used to estimate aging coefficient. One is evaluated by uniform linear regression equation for all ages and shows uniform strength reduction coefficient regardless of material properties and the other is evaluated by individual regression equation for each ages and shows nonuniform strength reduction and rebound increasing coefficients which decrease with increasing of rebound number and compressive strength. The latter result which can include the effect of rebound number and compressive strength is more resonable than the former.
|