Strength Control of Structures Made of High-Strength Concrete at the Stage of Operation of High-Rise Buildings

Various methods for evaluating the strength of concrete are analyzed in relation to bearing structures of high-rise buildings made of high-strength concrete in the operation process. It is shown that such peculiarities of high-strength concrete as a high modulus of elasticity and fragility due to increased heat of hardening and cracking do not make it possible to reliably control their quality and reliability by means of using some testing methods. Many normative methods of concrete testing were formed in the period of mass application of prefabricated reinforced concrete in construction when the quality control was performed mainly under the factory conditions. Non-destructive methods require the construction of calibration dependences. For high-strength concrete, it is proposed to exercise control and determination of the strength by means of combination of destructive and non-destructive methods with a complex analysis of direct tests of cores or control samples and the results of non-destructive methods of control.

A.A. DAVIDYUK1,2, Candidate of Sciences (Engineering), General Director (This email address is being protected from spambots. You need JavaScript enabled to view it.); I.M. RUMAYANTSEV1,2, Master, Head of the Center for Technical Inspection of Buildings and Structures 

1 National Research Moscow State University of Civil Engineering (26, Yaroslavskoye Highway, 129337, Moscow, Russian Federation) 
2 Design-Technological Bureau of Concrete and Reinforced Concrete (JSC «KTB RC» (6, str. 15A, 2nd Institutskaya Street,109428, Moscow, Russian Federation)

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