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Influence of excited environments on a mechanical properties armaturnyh steels

It is known, that in process of advancement of corrosion damages in a body of a concrete design protective properties of concrete in relation to armature which begins korrodirovat decrease therefore its cross area decreases.

Rust of a reinforcement steel throughout many years was a subject of studying of the big number of researchers and in particular it is possible to name works

S.N.Alekseeva, G.V.Akimova, G.P.Verbitsky, E.M.Gutmana, G.V.Karpenko, V.I.Novgorodsky [3, 4, 5, 92], etc. It is established, that armature rust in concrete is a special case of rust of metals, that is process of a gradual surface deterioration of a reinforcing bar as a result of chemical interaction with environment is meant. The difference consists only in speed of a supply of an aggressor to armature and its concentration.

As a result of armature rust in concrete its sectional view gradually decreases for the account prehoda metal outer layers in rust products.

The common opinion about influence of corrosion staggerings on prochnostnye is not present the characteristic of steels. In researches [27, 92, 136] the conclusion is drawn on insignificant influence of an excited environment on durability of a steel. At the same time in G.V.Akimova's work [3] it is noticed, that excited environment impact on a reinforcement steel causes decrease in time resistance and a steel liquid limit.

In S.N.Alexey's researches [4, 5] has established, that falling of durability of armature at corrosion damages to proportionally reduction of sectional view of a rod while plastic properties practically does not decrease, besides an armature stress condition, namely stretching pressure, do not change character of rust.

Experimental data [217] confirm J.Tsikermanom's received L, that processes of corrosion losses of metal in various excited environments and an iron fittings in concrete are phenomenologically similar.

In work [141] as a quantity indicator of rust of an iron fittings the thickness of a layer of products of rust has been offered became formed for the certain period of time.

According to A.I.popesko's researches [164] influence of an excited environment on reinforcing bars is considered by the equation of development of process of rust and defined as the sum of corrosion losses of a thickness of a rod during impact of an excited environment and an increment, increases in diameter of a rod at the expense of rust products.

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A source: Gubanova Maria Sergeevna. LONG WARPING PLOSKONAPRJAZHENNYH KORROZIONNO of the DAMAGED INTEGRAL REINFORCED CONCRETE CONSTRUCTIONS. The dissertation on competition of a scientific degree of a Cand.Tech.Sci. Kursk - 2018. 2018

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