Low-frequency ultrasonic pulse-echo datasets for geometry determination of a reinforced concrete step specimen with...

The dataset comprises raw data collected using the ultrasonic pulse-echo method on a concrete specimen. The specimen addresses two fundamental non-destructive testing (NDT) challenges in civil engineering: locating built-in elements and determining dimensions to analyse both the internal and external geometry of concrete structures. For data acquisition, the surface of the concrete specimen was automatically scanned point by point, with pulse-echo measurements performed at each measuring point. The automation of the measurement process ensured high repeatability and precision as well as a high measurement point density. Two low-frequency probes were used, each capable of both transmitting and receiving ultrasonic waves: one for longitudinal waves and one for shear waves. The longitudinal wave probe operates at frequencies of up to approximately 160 kHz, whereby a frequency of 80 kHz was used for the ultrasonic measurements here. The shear wave probe operates at up to 100 kHz, with a frequency of 50 kHz used for the measurements in this study. This article includes additional technical specifications of the two ultrasonic probes used, as well as information on their geometric specifications and directivity patterns. It also provides a detailed description of the further measurement equipment used. The ultrasonic raw data are stored in a universally readable format, with each time signal (A-scan) spanning two milliseconds and a sampling rate of two mega-samples per second. The provided data support comparative studies in signal analysis, imaging as well as interpretation and can be used for evaluation purposes in various practical NDT scenarios.