ULTRASONIC METHOD OF TESTING OF STRENGTH OF CENTRIFUGED CONCRETE IN ELONGATED FERROCONCRETE CONSTRUCTION DURING PROCESS OF EXPLOITATION Russian patent published in 1995 - IPC

FIELD: measurement technology. SUBSTANCE: time of propagation of ultrasonic is measured by means of surface sonic test at two directions - in lateral direction to direction of pre-stressed reinforcement and in longitudinal direction along the disposition of pre-stressed reinforcement. Strength of concrete is defined depending on relation of time of propagation of ultrasound at lateral direction to direction of pre-stressed reinforcement to time of propagation of ultrasound in longitudinal direction along the disposition of pre-stressed reinforcement according to preset dependence. EFFECT: improved precision of strength of concrete. 2 dwg