Concept of the model of frost impact on concrete of offshore structures
https://doi.org/10.33979/2073-7416-2024-111-1-78-87
Abstract
A conceptual approach is presented to predicting the durability of concrete under conditions of frost exposure and strong saturation based on the actual work of concrete in the structures of port facilities on the sea coast of the south of the island. Sakhalin. It is shown that the lack of methods for predicting concrete corrosion under frost exposure, despite the large amount of theoretical and experimental work on this topic, is due to the diversity and synergistic effect of factors that determine durability. It has been established that the multicyclic effect of sign-variable temperatures due to sea tides is not always the determining critical indicator of severity for the zone of variable level. Non-freezing water in the port waters and severe hydrometeorological conditions in the form of strong waves predetermine the icing of structures throughout the winter period. This factor in certain cases can be critical for concrete. Based on the results of the study of the state, properties and temperature-humidity regime of concrete in the structures of the zone of variable water level and the generally accepted theoretical principles of frost destruction of concrete, it is proposed to predict its service life in the zone of variable level of port facilities based on the concept of a two-stage process of frost corrosion. The possibility of predicting the durability of concrete based on scenario modeling of the process of development of the system of pore structure of the cement matrix, depending on its parameters by the beginning of frost exposure and the mechanism of freezing of concrete in structures, is shown.
About the Author
V. V. Malyuk
Branch FGBU «TSNIIP Russian Ministry of Construction» DalNIIS; Sakhalin State University
Russian Federation
Russian Federation
Malyuk Vladislav V., Junior Researcher; Senior Lecturer,
Vladivostok;
Yuzhno-Sakhalinsk.
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Review
For citations:
Malyuk V.V. Concept of the model of frost impact on concrete of offshore structures. Building and Reconstruction. 2024;(1):78-87. (In Russ.) https://doi.org/10.33979/2073-7416-2024-111-1-78-87
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