Effect of Moisture Distribution on Velocity and Waveform of Ultrasonic-Wave Propagation in Mortar

Okazaki, Shinichiro; Iwase, Hiroma; Nakagawa, Hiroyuki; Yoshida, Hidenori; Hinei, Ryosuke

doi:10.3390/ma14040790

Cited by 6 publications

(1 citation statement)

References 27 publications

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“…Prior to the removal The results obtained clearly demonstrate the non-linear character of the correlation between the UPV and moisture content of the material, as determined in the concrete specimens. This is also confirmed in [31]. The mathematical and physical models developed by Fadragas and Gonzalez [10] show that this relationship is best described using an exponential model.…”

Section: The Influence Of An Elevated Temperaturesupporting

confidence: 62%

Methodology for Determining the Correct Ultrasonic Pulse Velocity in Concrete

Lencis,

Udris,

Kara De Maeijer

et al. 2024

Buildings

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Quite often, concrete strength parameters must be determined in the shortest possible time. Due to the strong correlation between concrete’s mechanical and acoustic properties, ultrasonic devices can be used for this purpose. However, the ultrasonic pulse velocity (UPV) is influenced by a variety of factors, including the curing and exploitation conditions of the concrete, the presence of reinforcement, and other various physical factors. Ignoring these factors may contribute to the misinterpretation of the measurement data when determining the strength of the concrete. Typically, all these factors are analyzed independently. This publication consolidates the findings obtained from our research efforts and field expertise over the past two decades. It outlines the elaborated UPV measurement methodology based on the integration of a four-argument function: the hydration process phase of the hardened cement paste (or concrete aged three days and older), hardening (curing) condition, concrete moisture level, and ambient temperature. To understand the interactions of the key factors, different ultrasonic devices were used to measure the velocities of longitudinal and surface waves in concrete by applying direct and indirect transmission methods when concrete specimens were tested under different moisture and temperature conditions.

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Section: The Influence Of An Elevated Temperaturesupporting

confidence: 62%