ESTIMATING THE CONCRETE COMPRESSIVE STRENGTH USING ULTRASOUND TOMOGRAPHY

AUTHOR(S) / АУТОР(И): Dragan Nikolić , Dragan Bojović , Miloš Marković 

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DOI: 10.46793/29DIMK.444N

ABSTRACT / САЖЕТАК:

Evaluating the compressive strength of concrete without altering the structure is often achieved using non-destructive testing (NDT) methods. These techniques are popular in practice due to their low cost and the fact that they leave the structural elements intact. Among them, the rebound hammer and ultrasonic pulse velocity tests are the most frequently applied. However, a major drawback is their limited precision when compared to destructive methods. To overcome this issue, various analytical models have been introduced to better link NDT measurements with actual compressive strength values. In this investigation, a combined approach using both destructive and non-destructive techniques was adopted to assess in-situ concrete quality. Due to structural limitations, core extraction was only feasible from fourteen  columns. A polynomial regression model was applied to establish a relationship between the compressive strength and the velocity of shear waves obtained from ultrasonic tomography.

KEYWORDS / КЉУЧНЕ РЕЧИ:

Microbial technologies; Bacillus licheniformis; Spent coffee grounds

ACKNOWLEDGEMENT / ПРОЈЕКАТ:

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