On the evaluation of interface quality in concrete repair system by means of impact-echo signal analysis
| Autor: | Lesław Kwaśniewski, Andrzej Garbacz, Tomasz Piotrowski, Luc Courard |
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| Rok vydání: | 2017 |
| Předmět: |
Engineering
Signal processing business.industry Bond strength Interface (computing) Method engineering 0211 other engineering and technologies 020101 civil engineering Usability 02 engineering and technology Building and Construction Structural engineering Finite element method 0201 civil engineering Wavelet Nondestructive testing 021105 building & construction General Materials Science business Civil and Structural Engineering |
| Zdroj: | Construction and Building Materials. 134:311-323 |
| ISSN: | 0950-0618 |
| Popis: | According to Concrete Repair Manual as well as ACI 562-16 and European EN 1504-10 standards, a bond strength as a measure of adhesion is one the main feature of repair system necessary to be assessed. The most common laboratory and engineering method for bond strength evaluation is pull-off test. This is however a semi-destructive method that needs a repair in a place of measurement. Recently, the great interest in nondestructive techniques (NDT) development is noted. Impact-echo (IE) is considered as one of the most promising methods for this purpose. In this paper, the study on the usability the IE test based on frequency spectrum analysis for bond strength evaluation is analyzed. Both Finite Element Method (FEM) simulation and experimental tests were performed in order to obtain potential relations between IE frequency spectrum and parameters characterizing concrete substrate quality that may affect the final bond strength and the real value of pull-off bond strength measured on samples as well. It was concluded that the IE method can be a useful tool for interface quality and bond strength evaluations in concrete repair system. However, more complex signal analysis, e.g. wavelet analysis, should be considered in the future. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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