Вказано на неоднозначність у визначеннях категорій технічного стану будівельних конструкцій. Для залізобетонних конструкцій наведено уточнені формулювання категорій, в яких усунуто неоднозначність їх трактувань. Запропоновано додаткові класифікаційні ознаки технічного стану. На основі результатів дворівневого оцінювання несучої здатності

The paper considers the test results self-stressed concrete.In previous studies, it was noted that if the required level of pre-stress of concrete is provided,that is, at the level of a certain effective value, which depends on the structural and strengthparameters of the structural element, then in the limit state it is possible to fully use the strengthproperties of steel, and the concrete core operates in a three-axis stress state under compression withextreme values of longitudinal and radial stress. Therefore, it is necessary to study differentcompositions of self-stressed concrete. To achieve this goal, five series of prisms with differentcompositions were manufactured and tested. According to the results of experimental studies, it wasfound that the first, fourth and fifth series of prisms corresponds to the self-stress brand Sp 1.2 andis self-stressed concrete the second series of prisms does not correspond to any of the self-stressbrands due to the high content of Portland cement, the third series of prisms corresponds to the selfstress brand Sp 0.6 and is non-shrinkable concrete. Since the selected concrete is planned to be usedas the core of a steel concrete column it is advisable to check the ph metric of the given components.At the next stage of the study, the cement of the selected components was tested for ph-metry.For this purpose, aqueous solutions of cement additives and suspensions of selected components weretested for pH and EMF. As a result, possible inhibition of metal corrosion is also confirmed by highpH values of the liquid phase at the level of 8.25 1 13.85 (which is significantly higher than neutralpH = 7) in the presence of both individual additives and cement suspensions containing additives.Therefore, the use of self-stressed concrete with these additives is advisable.