Russian Federation
Russian Federation
Russian Federation
Purpose: To investigate the effect of concrete uniformity requirements on the accuracy of its strength characteristics; to identify the limitations of traditional strength control methods when working with high performance concretes. The particularities of the European and Russian regulatory approaches, the influence of the coefficient of variation on the reliability of the material classification and possible ways to improve the accuracy of control are considered. Methods: Methods of comparative analysis of regulatory documents and scientific publications in different countries, methods of mathematical statistics, and direct destructive tests of concrete samples for strength were used. Results: It has been found that as the concrete class increases, the influence of the coefficient of variation on the accuracy of classification, which can lead to errors in the classification of high strength concretes. The analysis of existing strength control methods has been carried out and their limitations have been identified. Differences in regulatory approaches between the European and Russian standards require the adaptation of control methods to modern requirements. It has been demonstrated that increasing the uniformity of concrete mixtures helps to increase the accuracy of design calculations and improve the operational characteristics of construction facilities. Practical significance: The results obtained can be used to improve concrete strength control methods, develop new regulatory requirements, and improve the reliability of concrete structures.
High-strength concrete, concrete homogeneity, compressive strength, quality control, coefficient of variation, test methods
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