Identification of the reinforcement bars in concrete samples using eddy currents thermography

• Autorzy: Różański Leszek , Ziopaja Krzysztof
• Języki publikacji: EN

Abstrakty

EN

It is known that sub-surface discontinuities of matter, internal voids, inclusions of other materials or delaminations of the structure can be revealed on the surface temperature distribution. An important element of IR thermography investigations is the application of an appropriate heat source to heat the examined object. This article discusses the use of eddy currents for identification of reinforcing bars in concrete samples. The experiments have the laboratory character and are used primarily for qualitative assessment of the influence of bar diameter and concrete cover thickness on the identification of reinforcement in concrete elements. In order to induce a transient heat flow in tested samples, the eddy currents (EC) generator from IFF GmbH was used. After the pulse was completed, the surface temperature distribution was recorded using FLIR T620 infrared camera. The following experimental studies validate the practical application of active IR with EC to locate and assess the technical condition of reinforcing bars in reinforced concrete structures in buildings and civil engineering structures.

Słowa kluczowe

EN

active IR thermography; eddy currents; reinforcement bars

• Wydawca: Wydawnictwo PAK
• Czasopismo: Measurement Automation Monitoring
• Rocznik: 2019
• Tom: Vol. 65, No. 2
• Strony: 55--59
• Opis fizyczny: Bibliogr. 11 poz., rys., wykr.

Twórcy

autor

Różański Leszek

• Poznan University of Technology, Faculty of Mechanical Engineering and Management, Piotrowo 3, 60-965 Poznań

autor

Ziopaja Krzysztof

• Poznan University of Technology, Faculty of Civil and Environmental Engineering, Piotrowo 5, 60-965 Poznań

Bibliografia

• [1] Minkina W.: Thermovision Measurements – Instruments and Methods. Publishing Office of Czestochowa University of Technology, Częstochowa, 2004 (in Polish).
• [2] Więcek B., De Mey G.: Infrared thermovision. Fundamentals and applications. PAK Publishing House, Warszawa, 2011. (in Polish).
• [3] Lewińska-Romicka A.: Badania materiałów metodą prądów wirowych. Biuro Gamma, Warszawa, 2007 (in Polish).
• [4] Noszczyk P., Nowak H.: Active thermography as a state-of-the-art method of testing reinforced concrete units (in Polish). J. Civ. Eng. Environ. Arch., 33, pp. 279-286, 2016.
• [5] Riegert G., Zweschper T., Busse G.: Lockin thermography with eddy current excitation. QIRT Journal, vol. 1, issue 1, pp. 21-32, 2004.
• [6] Abidin I. Z., Tian G. Y., Wilson J., Yang S., Almond D.: Quantitative evaluation of angular defects by pulsed eddy current thermography. NDT&E International, vol. 43, pp. 537-546, 2010.
• [7] Świderski W.: Possibility of defect detection by eddy current thermography in marine structures. Scientific Journals of the Maritime University of Szczecin, 44 (116), pp. 43-46, 2015.
• [8] Szymanik B., Frankowski P. K., Chady T., Chelliah C.R. A. J.: Detection and inspection of steel bars in reinforced concrete structures using active infrared thermography with microwave excitation and eddy current sensors. Sensors, 16(1), 16, Open Access Article on https://www.mdpi.com, 2016.
• [9] De Alcantra N. P. Jr., Da Silva F. M., Guimaräes M. T., Pereria M. D.: Corrosion assessment of steel bars used in reinforced concrete structures by means of eddy current testing. Sensors, 16(1), 15, Open Access Article on https://www.mdpi.com, 2016.
• [10] He M., Zhang L., Zheng W., Feng Y.: Crack detection based on a moving mode of eddy current thermography method. Measurement, vol. 109, pp. 119-129, 2017.
• [11] Różański L., Ziopaja K.: Applicability analysis of IR thermography and discrete wavelet transform for technical conditions assessment of bridge elements. QIRT Journal, vol. 16, issue 1, pp. 87-110, 2019.

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).