Review article

Part 1 of this study presents the engineering method of researching the non-stationary temperature field by means of electro-thermal treatment (ETT) of plug connections in reinforced concrete columns of precast-monolithic structures during the installation using advanced technology of precast-monolithic construction [1]. The presented method of calculation has been developed using the capabilities of the MathCAD computing environment. It is a fairly simple method which is convenient in application. However, despite the presented example of application of the method demonstrating its effectiveness, it needs the experimental confirmation. Therefore, a laboratory model of the plug connection was developed, and experiments were performed with its use, which confirmed the reliability of the proposed calculation method. There has been proved the possibility of this technique to determine not only the spatial characteristics of the temperature field, but also the time ones. With the help of the calculation method, there have been carried out studies of the characteristics of the temperature field in the process of electro-thermal treatment (ETT) in relation to the real conditions, and recommendations for using the ETT in precast-monolithic construction have been developed.