Frost Destruction of Concretes. Part 1. Mechanism, Criterial Conditions of Control

Number of journal: №9-2017
Autors:

Chernyshov E.M.

DOI: https://doi.org/10.31659/0585-430X-2017-752-9-40-46

AbstractAbout AuthorsReferences
A scientific-engineering problem of the frost destruction of concretes in building structures is discussed in a generalized statement. The importance of this generalization due to, on the one side, the appearance of new high technological dense and macro-porous concretes with a modified, nano-modified including, structure, on the other side, due to the expansion of their application fields, under the extreme conditions of operation of buildings and structures including, is shown. The systematization of phenomena and processes which determine the mechanisms and factors of damage accumulation in the material in the course of multiple and cyclic freezing and thawing is presented in the context of studies of frost-resistance prob- lems conducted by domestic and foreign scientists for the last 50–60 years. A special attention is paid to the peculiarities and regularities of the exhaustion of potential of the frost- resistance of concretes in the course of their operation in building structures. Taking into account the factor of the solid phase structure and porous space of the concrete, the defining value of the thermo-gradient factor of structure conditions for the development of heat and mass transfer processes in the concrete and, accordingly, for the intensity and measures of its frost destruction are analyzed. Criterial conditions of providing the potential of workability of concretes in the structures subjected to the frost impact of the operational environment are substantiated.
E.M. CHERNYSHOV, Doctor of Sciences (Engineering), Academician of RAACS (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Voronezh State Technical University (84, 20-letiya Oktyabrya Street, 394006, Voronezh, Russian Federation)

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For citation: Chernyshov E.M. Frost destruction of concretes. Part 1. Mechanism, criterial conditions of control. Stroitel’nye Materialy [Construction Materials]. 2017. No. 9, pp. 40–46. DOI: https://doi.org/10.31659/0585-430X-2017-752-9-40-46. (In Russian).


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