|
Title |
An Experimental Study on the Compressive Strength of Reinforcing Bars in Concrete Specimens and Compressive Strength Measurement Methods
|
|
Authors |
이원홍(Won-Hong Lee) ; 최상기(Sang-Gi Choi) ; 이승열(Seuong-Yeol Lee) ; 안진희(Jin-Hee Ahn) ; 강범주(Beom-Ju Kang) |
|
DOI |
https://doi.org/10.11112/jksmi.2021.25.6.33 |
|
Abstract |
Measuring the compressive strength of concrete is a very important factor in the safety review of concrete structures. Concrete compressive strength measurement methods include destructive and non-destructive methods. The destructive method includes the uniaxial compression failure method, and the non-destructive method includes the rebound hardness method and the elastic wave measurement method. In this study, the type of measurement method and the effect of reinforcing bars inside the concrete were tested to examine the relationship between them. Regardless of the type of specimen, the average compressive strength by the elastic wave measurement method among the three experimental methods was greater than the average compressive strength by the other methods. When the specimen type is the same, the standard deviation of the measured values of the elastic wave measurement method is smaller than that of the other measurement methods, so it can be seen that the elastic wave measurement method does not show large variance in the measured values compared to the other two measurement methods. When the average compressive strength according to the test method for each specimen was compared with the average compressive strength of the compressive failure test method, the average compressive strength was measured to be high in the order of the elastic wave measurement method, the compression failure test, and the rebound hardness method. Since the measured values of the compressive strength of concrete are different depending on the method of measuring the compressive strength of concrete and the presence or absence of reinforcing bars inside the concrete, further research is required considering the effect of various concrete covers.
|