Repair monitoring of cracked concrete floor using the impulse response method

Nikolaos Zoidis; Efthymios Tatsis; Christos Vlachopoulos; Anastasios Gotzamanis; Jesper Stærke Clausen; Dimitrios Aggelis; Theodore E. Matikas

doi:10.1117/12.2045123

21 April 2014 Repair monitoring of cracked concrete floor using the impulse response method

Nikolaos Zoidis, Efthymios Tatsis, Christos Vlachopoulos, Anastasios Gotzamanis, Jesper Stærke Clausen, Dimitrios Aggelis, Theodore E. Matikas

Author Affiliations +

Proceedings Volume 9063, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2014; 90630P (2014) https://doi.org/10.1117/12.2045123
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2014, San Diego, California, United States

Abstract

The objective of the present study was the repair monitoring of an extensively cracked concrete floor using the Impulse – Response method. The study included the evaluation of the condition of the concrete floor that suffered from extensive cracking on its surface, through systematic tests. The purpose of the study was to investigate the causes that led to extensive cracking on the floor surface in order to plan the repair strategy. The investigation included a thorough visual inspection and recording of cracks, estimation of the crack depth using ultrasonic pulse velocity measurements, investigation for voids between the concrete floor and the underlying aggregate layer using the Impulse – Response method, concrete floor thickness estimation using the Impact – Echo method and concrete quality estimation using cores cutting. The repair method that was chosen was based on grout injections in order to fill the voids located between the concrete and the underlying aggregate layer. The area, where the injections took place, was inspected using the Impulse – Response method before and after the injections for monitoring purposes and a secondary grid was designed after considering the results. The area was inspected for a third time, after injecting in the secondary grid, in order to confirm the successful filling of the voids.

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Nikolaos Zoidis, Efthymios Tatsis, Christos Vlachopoulos, Anastasios Gotzamanis, Jesper Stærke Clausen, Dimitrios Aggelis, and Theodore E. Matikas "Repair monitoring of cracked concrete floor using the impulse response method", Proc. SPIE 9063, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2014, 90630P (21 April 2014); https://doi.org/10.1117/12.2045123

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KEYWORDS

Ultrasonics

Velocity measurements

Inspection

Calibration

Nondestructive evaluation

Receivers

Wave propagation

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