Innovative technologies in the construction industry have taken a firm position in the construction-engineering sector. The article discusses the new technologies used for strengthening the foundations of different types. A study on the traditional method of strengthening foundations has been carried out and indicators of new technologies use are presented. Traditional options for strengthening foundations by increasing the foundation base are considered, from the point of view of geotechnics and manufacturability in relation to loose and saturated soils. The operational characteristics of new technologies during the work on strengthening the foundations are given.

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Various researchers have long studied heat treatment of steel. In the process of mechanical engineering, machine parts are formed by heat. The article deals with a brief summary of the thermal and chemo-thermal reprocessing of steel. The range of heating temperatures during annealing and quenching is determined. The structure of steel and its properties are considered. The research characteristic of all stages of chemo-thermal reprocessing of steel is carried out. Steel microstructure in the process of heat treatment of metal is studied.

The use of aluminum alloys is limited due to their tendency to local corrosion (delaminating, pitting, corrosion cracking and corrosion fatigue). Corrosion, which leads to cracking, appears primarily in high-strength alloys, where they are subjected to prolonged tensile stress in the presence of a corrosive medium This article presents the results of studies of the tendency to intergranular corrosion and corrosion cracking of highstrength aluminum alloy 1933. It is established that the tendency to intergranular corrosion does not depend on cooling conditions during quenching. The experimental data are summarized in a table from which it follows that the material of the selected forgings in almost all cases exhibits a tendency to intergranular corrosion, regardless of the temperature of the water during quenching. In order to obtain data, structural studies of intergranular corrosion have been carried out, which can be used to predict the structure and properties of alloy products after heat treatment to establish the correspondence between the tendency to MKC and KR in order to reduce the time for conducting control tests.

This study reveals the features of the macroanalysis of steel. The essence of the methods of macroanalysis is revealed. The basic concepts of conducting and preparing a study are considered, for more accurate information of the results. An example of studying the macrostructure of cast and deformed materials is given. An example of revealing a layer created by chemical heat treatment is considered.In the course of the study, a conclusion was made on the applied methods of macroanalysis of steel.