Detection of Steel Bars in Concrete by Impact-Echo

Abstract

Due to the impact-echo defectoscopy tests of a massive block of underreinforced concrete steel bars of diameter 22 and 32 mm were detected. This fact is described in the paragraph, and results are provided through a visualization of b-scanning. The effect of a concrete cover layer and of the reinforcement diameter is clear on the sensitivity of the method. Because of various parameters of the reinforcement, impactors of a different ball diameter were employed. With a ball of diameter 12 mm, 8 mm and 5 mm reinforcement at the depth of about 50 to 60 mm was detected.KEY WORDS: Impact-echo, concrete, non-destructive testing of steel bar detection.

Diagnostics of Concrete and Steel in Elements of an Historic Reinforced Concrete Structure

“…Impact-echo [ 51 ] and impulse response [ 52 ] methods, which rely on the analysis of the flow time of a mechanically excited wave in the tested medium (concrete), can also be used to assess the continuity of the reinforcement. The acoustic emission (AE) method is also more and more widely used [ 53 , 54 , 55 ].…”