Nondestructive testing system and method for bridge deck concrete strength based on ultrasonic rebound

Abstract

The application provides a kind of bridge deck concrete strength nondestructive testing system and detection method based on ultrasonic rebound, it is related to concrete nondestructive testing technical field, the application obtains each measurement point parameter by dividing measurement grid, and prepares different concrete layer thickness and reinforcing steel bar cover thickness test piece to be used to fit acoustic path correction factor, to correct the interference of reinforcing steel bar to ultrasonic wave propagation;Again, the basic sound velocity and reinforcing steel bar thickness ratio are obtained by combining ultrasonic measurement, the real sound velocity is calculated, and the state reference line is generated corresponding to the rebound value;Finally, the residual error and the angle of each measurement point deviating from the reference line are calculated, and the state correction factor is generated by combining the sound velocity-rebound coupling term, to correct the reference strength, so as to realize the accurate and nondestructive evaluation of bridge deck concrete strength.

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