| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for managing a quality of a concrete highly accurately for a long term at low costs by quickly and surely measuring a compressive strength of the concrete of an actual structure in a nondestructive way. SOLUTION: The method comprises a process of obtaining a relationship between a sound velocity of ultrasonic waves propagating in a test body S and a compressive strength of the test body with the use of the test body S for managing a concrete quality, a process of burying a reflecting plate 20 for reflecting ultrasonic waves into a concrete structure 10 when the concrete structure is constructed, a process of measuring reflecting waves by the ultrasonic waves towards the reflecting plate 20 from a surface of the concrete structure C, thereby measuring a sound velocity of ultrasonic waves propagating in the concrete structure, and a process of estimating a compressive strength of the concrete structure from the measured value of the sound velocity of ultrasonic waves propagating in the concrete structure on the basis of the relationship of the sound velocity and compressive strength obtained by the test body S. |
