Ivanovo, Ivanovo, Russian Federation
UDK 624.012.45 Конструкции из армированного бетона (монолитного).
The paper considers a new method of detecting the carbonization of concrete that can be successfully applied at the field and laboratory stages of examining building structures made of reinforced concrete. The study included cases of carbonization and evaluated its influence on durability of civil, industrial, transport and other various building structures made of concrete and reinforced concrete. The paper includes examples of facilities where surveys can be conducted using the new method. This method was also compared with that of the phenolphthalein indicator solution in terms of its effectiveness. The new method makes it possible to assess the state of the protective layer of concrete and identify the zones where the corrosion of concrete, which is associated with mass transfer of the target component, has just begun or is fully running. A disadvantage of the phenolphthalein indicator solution method (PISM) is that it does not show a complete picture of the pH distribution of concrete over the layers, since the indicator has 1 working color transition interval. A new promising method makes it possible to assess the condition of the examined reinforced concrete structures for their durability and the degree of damage, since it has an increased accuracy in comparison with the phenolphthalein indicator method. The results obtained by the new method can be used both to organize/calculate physical and mathematical models of mass transfer process development during concrete corrosion and to organize the repair of reinforced concrete and concrete building structures.
corrosion, carbonization, concrete, reinforced concrete, in spection, phenolphthalein indicator, universal indicator, mass transfer
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