Technologies for acoustic emission monitoring of concrete and reinforced concrete structures
https://doi.org/10.37538/2224-9494-2023-3(38)-62-81
EDN: PGTEGQ
Abstract
Introduction. The acoustic emission (AE) method is successfully used for diagnostics and monitoring in various industries including oil and gas, nuclear, aerospace as well as in welding processes and structural corrosion. However, inspection of reinforced concrete structures seldom involves the AE method. The main reason behind is the lack of regulatory documents and specific control procedures.
State Standard R 59938-2021 “Concretes. Acoustic emission testing method” was issued in 2021. Over the past few years, new data on effective application of the acoustic emission method for non-destructive testing and technical diagnostics of the building structures have been obtained. The studies were carried out on specimens and fragments of structures (reinforced concrete beams, concrete samples in the form of slabs, wall panels, etc.) in NIIZHB named after A.A. Gvozdev. The studies were conducted on the structures under construction at Kursk NPP-2.
Aim. To present the results of the recently developed methods of technical diagnostics and non-destructive AE testing of concrete and reinforced concrete structures.
Materials and methods. The investigations were carried out on concrete and reinforced concrete specimens made of both normal (B15–B40) and high-strength (B60–B100) concrete. A number of beams were made of fiber concrete. Structures were tested in the power unit. AE monitoring of concrete hardening involved concrete mixtures made of heavy, fine-grained, cement concrete with mineral and chemical additives. Concrete hardening was investigated remotely, with online data transmission.
Results. Based on the results of the conducted study, the technologies for acoustic emission monitoring and technical diagnostics of the structures under construction and in operation have been developed.
Conclusions. The given acoustic emission technologies can be used for monitoring and technical diagnostics of structures under construction and in operation. The implementation of technologies in construction will lead to the increase in safety and reliability of building structures due to the introduction of acoustic emission monitoring.
Keywords
acoustic emission,
concrete and reinforced concrete structures,
non-destructive testing of concrete hardening,
technical diagnostics
Supporting agencies: A partial funding was provided by the FAU “FCC.”
About the Author
A. I. Sagaidak
Research Institute of Concrete and Reinforced Concrete (NIIZHB) named after A.A. Gvozdev, JSC Research Center of Construction
Russian Federation
Russian Federation
Alexandr I. Sagaidak, Cand. Sci. (Engineering), Leading Researcher of the Center No. 20
e-mail: sagaidak-niizhb@mail.ru
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Review
For citations:
Sagaidak A.I. Technologies for acoustic emission monitoring of concrete and reinforced concrete structures. Bulletin of Science and Research Center of Construction. 2023;38(3):62-81. (In Russ.) https://doi.org/10.37538/2224-9494-2023-3(38)-62-81. EDN: PGTEGQ
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