Assessment of ultrasonic data of signals backscattered by mortar using the principal component analysis

Abstract

In this paper, we present the assessment of ultrasonic parameters of signals backscattered by mortar using the Principal Component Method. The measurement has been performed by the ultrasonic reflection technique using a transducer with a central frequency 0.5 MHz. The samples examined consist of specimen mortar mixtures prepared with ratio cement/sand (c/s = 0.5) and water/cement (w/c = 0.65) and studied at three temperatures 25 °C, 32 °C and 42 °C. The projection of the data showed that more than 93% of the information is retained and presented in 2D space. The correlation between Acoustic Impedance and Ultrasonic Velocity at 25 °C, 32 °C and 42 °C are 96.95%, 99.98%, and 99.98% respectively. The data are associated with the research article “Ultrasonic Characterization and Hardening of Mortar Using the Reflection Technique” (H.LOTFI and al.).

Keywords

• Non Destructive Testing
• Ultrasonic velocity
• Mortar
• Principal component analysis (PCA)