Повышение эффективности методов неразрушающей диагностики железобетонных конструкций объясняется снижением трудоемкости диагностического процесса или повышением точности оценки состояния объекта исследования. Разработка методов одновременно снижающих трудозатраты и повышающих точность исследования представляет особый интерес. В работе предлагается использование видеоэндоскопов и спецустройств для обследования внутренней поверхности железобетонных конструкций в условиях ограниченного доступа. Описаны особенности использования диагностического оборудования, разработан алгоритм обследования опор контактной сети и представлена схема устройства отбора проб для спектральной диагностики.
The paper presents the results of experimental studies on the determination of corrosion products on the surface of reinforced concrete structures. Methods for creating samples with artificial electrocorrosion under conditions close to real operation are discussed. The results of testing samples with different degrees of corrosion using laser-spark emission spectrometry (LIBS) devices are presented. The test is carried out on two different devices, a LIBS setup and a portable American-made laser analyzer LIBZ-300pe
The paper presents the results of experimental studies on the determination of corrosion products on the surface of reinforced concrete structures. This paper also discusses methods for creating samples with artificial electro corrosion under conditions close to real operation. The paper presents the results of testing samples using laser-inducted breakdown spectrometry (LIBS) devices.
Actual problems of diagnosing the corrosion condition of hollow reinforced concrete structures are considered using reinforced concrete supports of the contact network as an example. Existing methods of diagnosing hollow reinforced concrete structures are discussed, advantages and disadvantages of these methods are revealed. The method of laser spectroscopy is reported to be the most promising approach to solving the problem due to its high reliability and the possibility to transmit laser radiation by fiber optic cable. A new design solution is proposed for positioning an optical probe inside a hollow structure to check the surface of the underground part of the reinforced concrete support. The optical probe is designed to determine the quantitative composition of corrosion products released to the surface of concrete by means of laser spectroscopy. A diagram of the optical sensor of the proposed device is presented, the sensor design is described. The proposed device allows to obtain quantitative information on the concentrations of corrosion products on the surface of reinforced concrete structure. Thus, by performing measurements on the surface and evaluating the condition of the reinforcement, it is possible to predict the residual strength of the supports, depending on the location of the point of greatest corrosion attack.
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