Assessment of concrete resistance to high temperature based on State Standard 29167–2020
Abstract
On the basis of the analysis of experimental studies, brittleness criteria for high-strength concrete at high temperatures are proposed and their threshold values are recommended, which are determined by the developed method for concrete at t = 20 °C. The brittleness criteria for high-strength concrete at high temperature for operational structures are determined on the basis of the dependence of the elastic modulus E and the critical stress intensity coefficient KIC on the surface hardness H. On the basis of the experimental data obtained, the value of the surface hardness (at t = 20 °C) of high-strength concrete H > 450 MPa is proposed, when heated, brittle fracture will occur.
About the Authors
S. N. Leonovich
Belarusian National Technical University
Belarus
Belarus
Doctor of Sciences (Engineering), Professor, Foreign Academician of RAACS
e-mail: leonovichsn@tut.by
D. A. Litvinovsky
N. A. Budrevich
References
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9. Patent BY 16194. Sposob opredeleniya kriticheskogo koeffitsienta intensivnosti napryazheniya vysokoprochnogo betona [The method of determining the critical stress intensity factor of high strength concrete]. Leonovich S.N., Litvinovsky D.A. Declared 30.03.2010. Published 30.08.2012. (In Russian).
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Review
For citations:
Leonovich S.N., Litvinovsky D.A., Budrevich N.A. Assessment of concrete resistance to high temperature based on State Standard 29167–2020. Concrete and Reinforced Concrete. 2021;605(3):14-18. (In Russ.)
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