Abstract
This paper has carried out an experimental program to establish a relatively accurate relation between the ultrasonic pulse velocity (UPV) and the concrete compressive strength. The program involved testing concrete cubes of (100) mm and prisms of (100×100×300) cast with specified test variables. The samples are tested by using ultrasonic test equipment with two methods, direct ultrasonic pulse (DUPV) and surface (indirect) ultrasonic pulse (SUPV) for each sample. The obtained results were used as input data in the statistical program (SPSS) to predict the best equation representing the relation between the compressive strength and the ultrasonic pulse velocity. In this research 383 specimens were tested, and an exponential equation is proposed for this purpose. The statistical program has been used to prove which type of UPV is more suitable, the (SUPV) test or the (DUPV) test, to represent the relation between the ultrasonic pulse velocity and the concrete compressive strength. In this paper, the effect of salt content on the connection between the ultrasonic pulse velocity and the concrete compressive strength has also been studied.
Highlights
The (UPV) method estimates the compressive strength of concrete by measuring the (UPV) from the pulse passing the time between the transmitter and receiver at certain distances in a concrete structure
This study aims to correlate the compressive strength of the tested cubes and the results of the non-destructive tests (UPV) for the prism cast from the same concrete mix by using statistical methods
A comparison had been made to find the best form of the (UPV) type: surface ultrasonic pulse velocity (SUPV) or direct ultrasonic pulse velocity (DUPV) to represent the relation between UPV and the compressive strength
Summary
The (UPV) method estimates the compressive strength of concrete by measuring the (UPV) from the pulse passing the time between the transmitter and receiver at certain distances in a concrete structure. The ultrasonic pulse velocity can evaluate concrete quality factors such as the compressive strength by obtaining a correlation between the (UPV) and the compressive strength. This study aims to correlate the compressive strength of the tested cubes and the results of the non-destructive tests (UPV) for the prism cast from the same concrete mix by using statistical methods. Several studies have been made to develop the relationship between the ultrasonic pulse velocity and the compressive strength; Jones R. Equation in (1962) [1].
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