Investigating the correlation between sand particle size and ultrasonic properties of mortar: A comprehensive analysis using ultrasonic techniques

The accurate characterization of construction materials is crucial for ensuring their durability and performance in the construction industry. This study focuses on the non-destructive characterization of mortar using ultrasonic techniques to investigate the impact of sand grain size on ultrasonic properties. Using 1 MHz transducers, we observed significant non-linear variations in ultrasonic velocity, with a decrease to 3100 m/s at a particle size of 0.3 mm, followed by an increase to 3700 m/s as the grain size approached 0.7 mm. These results demonstrate a strong correlation between sand grain size and the ultrasonic properties of mortar, highlighting the influence of particle size on parameters such as transmission coefficient and acoustic impedance. By selecting appropriate sand grain sizes, the risk of cracking and degradation in mortar can be minimized, leading to improved durability and structural integrity. This study contributes actionable insights for optimizing mortar compositions, paving the way for enhanced construction materials.