|
Title |
A Study on the Correlation Between Compressive Strength and Ultrasonic Velocity of Concrete Exposed to Domestic Environments
|
|
DOI |
https://doi.org/10.11112/jksmi.2024.28.6.23 |
|
Keywords |
국내환경; 초음파속도; 압축강도; 혼화재료; 일반 콘크리트 Domestic environment; Ultrasonic pulse velocity; Compressive stregnth; Admixture; Ordinary concrete |
|
Abstract |
This study measured the compressive strength and ultrasonic pulse velocity of various concretes exposed to the domestic environments for approximately 15 years, and investigated the relationship between the compressive strength and ultrasonic velocity. The test specimens were divided into three types (w/c 40%, 50%, and 60%) according to the water/cement ratio using ordinary portland cement and three types (blast furnace slag, fly ash, and silica fume) according to the type of admixture. The analysis of the compressive strength showed that, regardless of the specimen type, the compressive strength increased with age. As a result of analyzing the ultrasonic velocity according to the type of water/cement ratio, the ultrasonic velocity showed a tendency to increase as the water/cement ratio decreased and as age increased, and the ultrasonic velocity at 15 years of age increased by about 0.11 to 0.20 km/s compared to the ultrasonic velocity at 28 days of age. The results of ultrasonic velocity according to the type of admixture also showed that the ultrasonic velocity tended to increase as the age increased, and the velocity increased by about 0.08 to 0.38 km/s compared to the ultrasonic velocity at 28 days. As a result of the correlation between compressive strength and ultrasonic velocity according to the type of water/cement ratio, a linear relationship was shown in which ultrasonic velocity increased as the water/cement ratio decreased. Meanwhile, the results of analyzing the correlation between the compressive strength and ultrasonic velocity according to the type of admixture showed a lower correlation between compressive strength and ultrasonic pulse velocity.
|