Non-destructive evaluation of strength gain of ordinary portland cement mortar by ultrasonic pulse velocity method

This paper presents results of the study of ultrasonic pulse velocity and compressive strength of ordinary Portland cement mortar. Objectives of this study are to determine correlations between ultrasonic pulse velocity and compressive strength of cement mortar and to predict strength of cement mortar at 28 days within 02 days using ultrasonic pulse velocity of cement mortar. Water/cement ratio, sand content, method of specimen preparation, curing media and curing temperature were kept constant throughout the experiment. Portable Ultrasonic Nondestructive Digital Indicating Tester with transducers of 54 kHz frequency was used to measure ultrasonic pulse velocity.