The development and current state of methods for the nondestructive testing and acoustic tomography of concrete

Abstract

The development of acoustic methods for the nondestructive testing of concrete during the recent decades is described. The main characteristic problems and tasks of acoustic tomography of concrete are outlined and the evolution of the methods of their solution is analyzed. The advantages and disadvantages of the synthetic aperture focusing method as a tool for the visualization of the inter nal structure of concrete are discussed. Possible directions of further progress in theory, as well as prac tical acoustic tomography methods, including those using phase information, are indicated.Keywords: acoustic tomography of concrete, synthetic aperture focusing method (SAFT)

Defectoscope for monitoring of a concrete timbering of underground constructions

“…It can be reached only with use of nondestructive methods. Now in world practice for identification of spaces behind a concrete cover two methods were widely adopted: high-frequency georadar-location [5,6] and low-frequency ultrasonic tomography [7,8]. Development of the specified methods became possible only in the last 20 years.…”

A Study on Testing Concrete Strength by Inversely Regressed Synthesis Ultrasonic-rebound Method

“…People attach more and more significance on the real strength of structural concrete on construction site. However, direct testing of concrete strength on structural concrete can't do without nondestructive testing technology [1].…”