Suggestion for Non-Destructive Testing Equation to Estimate Compressive Strength of Early Strength Concrete

Title & Authors
Suggestion for Non-Destructive Testing Equation to Estimate Compressive Strength of Early Strength Concrete
Lee, Tae-Gyu; Kang, Yeon-Woo; Choi, Hyeong-Gil; Choe, Gyeong-Choel; Kim, Gyu-Yong;

Abstract
In construction field, it used various technique for concrete formwork. Part of them, non-destructive test has been conducted to estimate a compressive strength of concrete easily such as rebound method and ultrasonic pulse velocity method etc. Former research has recommend proposed equation based on experimental data to investigate strength of concrete but it was sometimes deferent actual value of that from in field because of the few of data in case of early strength concrete. In this study, an experiment was conducted to analyze strength properties for early strength concrete using cylinder mold and $\small{1,000mm{\times}1,000mm{\times}200mm}$ rectangular specimen. And compressive strength of concrete was tested by non-destructive test, and calculated by the equation proposed former research. As a result, the non-destructive test results showed approximately 70 percent of the failure test value for all conditions, and worse reliability was obtained for high strength concrete samples when the ultrasonic pulse velocity method was used. Based on the scope of this study, the experimental equation for estimating compressive strength of early strength concrete from 24MPa to 60MPa was proposed.
Keywords
non-destructive test;rebound method;ultrasonic pulse velocity;early strength concrete;experimental equation;
Language
Korean
Cited by
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