Romanian Achievements in Nondestructive Strength Testing of Concrete

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Title: Romanian Achievements in Nondestructive Strength Testing of Concrete

Author(s): loan Facaoaru

Publication: Special Publication

Volume: 82

Issue:

Appears on pages(s): 35-56

Keywords: compressive strength; concretes; impact hammer tests; -- nondestructive tests; ultrasonic tests.

Date: 9/1/1984

Abstract:
This paper summarizes Romanian experience concerning in-situ concrete strength estimation by non-destructive methods. The methods presented include "classical" non-destructive methods such as ultrasonic pulse method and rebound method. The philosophy of transforming the measured property into concrete strength, taking into account concrete composition and maturity, is given. Details about original developments of non-destructive methods for concrete strength estimation are also presented. Such developments are: a) combined SONREB method based on pulse velocity and rebound index measurements, b) sonic coring method, an immersion method using radial transducers, adapted for the inspection of deep foundations, c) acoustic method by shock, a method based on the measurement of the natural period for the quality