Corrosion of Reinforce Bars in RC Constructions

Blikharskyy, Zinoviy; Selejdak, Jacek; Blikharskyy, Yaroslav; Khmil, Roman

doi:10.2478/czoto-2019-0036

Cited by 18 publications

(6 citation statements)

References 20 publications

(8 reference statements)

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“…] and defects [Orešković M. et al 2018]. Main defect is corrosion of internal steel reinforcement, which appear from influence of environmental and other factors [Blikharskyy Z. 2019].…”

Section: Introductionmentioning

confidence: 99%

Comparison Crack Resistance of RC Beams with and without Transverse Reinforcement after Shear Testing

Vegera

Khmil

Vashkevych

et al. 2019

Quality Production Improvement - QPI

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Main parameters, which characterize shear strength, are crack distribution, width of diagonal crack opening and angle of inclined crack. There are in this article, comparison crack resistant of testing reinforced concrete (RC) beams on the shear with such variable parameters like presence or absence internal reinforcement, different shear span, and presence or absence external composite reinforcement. Shear span (relative span to effective depth ratio) was acquired the following values: a/d=2, 1.5, 1. For internal reinforcement, rebar’s A240C with diameter 8 mm and steps 100 mm was chosen. The composite FRCM system was like external reinforcement with three stripe of composite fabric with width 70 mm and step 100 mm. Eight RC beams were tested. After testing, we discovered that the most influenced on the serviceability capacity was shear span. Internal transverse reinforcing increased shear strength on the same level and it was independent from shear span and other factors. Only quantity of reinforcing determine level of increasing shear capacity. FRCM system is efficient strengthening system, which significant increase shear crack resistant for RC beams. External FRCM reinforcing increase shear crack resistance on the same percentage and independent from presence or absence internal reinforcement.

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“…] and defects [Orešković M. et al 2018]. Main defect is corrosion of internal steel reinforcement, which appear from influence of environmental and other factors [Blikharskyy Z. 2019].…”

Section: Introductionmentioning

confidence: 99%

Comparison Crack Resistance of RC Beams with and without Transverse Reinforcement after Shear Testing

Vegera

Khmil

Vashkevych

et al. 2019

Quality Production Improvement - QPI

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“…The problem is enormous because lowcarbon structural steel is sensitive to corrosion. The corrosion rate depends on different environments [1,[4][5][6][7][8]. The risks of losing steel properties due to corrosion occur especially clearly in aggressive atmospheres.…”

Section: Corrosion Of the S235jr Carbon Steel After Normalizing Andmentioning

confidence: 99%

Corrosion of the S235JR Carbon Steel after Normalizing and Overheating Annealing in 2.5% Sulphuric Acid at Room Temperature

LIPIŃSKI

2022

Terotechnology XII

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Abstract. The low-carbon steels offer economical properties of mean hardness, strength, and low corrosion resistance, but the steel can be welded without restrictions, usually. The structural low carbon steels have a ferritic-perlitic microstructure. The microstructure depends on the manufacturing technology and heat treatments of steel. This steel is not intended for heat treatment. However, due to the technological process, which is welding, the material often overheats. This overheating causes microstructure growth. The effect of larger grains of the steel microstructure is the reduction of its functional properties. Corrosion resistance is an essential factor in structural steel’s quality and application. The purpose of this article is to investigate corrosion resistance using weight loss and profile roughness parameters of typical structural steel in grade S235JR in 2.5% sulphuric acid solution in distilled water. Samples were tested after normalizing and superheating annealing. Corrosion tests show that continued corrosion characterizes tested steel in both corrosive environments. Roughness parameters for every one of the research times determine the size of steel corrosion.

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“…Given that hydrogen interacting with metal on the one hand facilitates the nucleation and development of defects in local volumes [6][7][8][9], and on the other hand accelerates its degradation due to the flooding ability of the media, which is caused by their electrochemical interaction with the metal and the release of hydrogen [10][11][12][13][14][15][16], this process is enhanced by a change in the stress-strain state in local volumes due to its change along the length of the pipe (bends, bends). All changes are most fully manifested on the inner surface of the pipe in contact with the environment, which affects the operational degradation that occurs under the combined action of stresses under the working pressure and corrosive-wetting environments, which reduces the material's resistance to strain and destruction.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Technical Condition of Pipes during the Transportation of Hydrogen Mixtures According to the Energy Approach

Ivanytskyi,

Blikharskyy,

Sęp

et al. 2024

Applied Sciences

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In this study, a theoretical–experimental methodology for determining the stress–strain state in pipeline systems, taking into account the hydrogen environment, was developed. A complex of theoretical and experimental studies was conducted to determine the specific energy of destruction as an invariant characteristic of the material’s resistance to strain at different hydrogen concentrations. The technique is based on the construction of complete diagrams of the destruction of the material based on the determination of true strains and stresses in the local volume using the method involving the optical–digital correlation of speckle images. A complex of research was carried out, and true diagrams of material destruction were constructed, depending on the previous elastic–plastic strain and the action of the hydrogen environment. The change in the concentration of hydrogen absorbed by the material was estimated, depending on the value of the specific energy of destruction. A study was conducted on tubular samples, and the degree of damage to the material of the inner wall under the action of hydrogen and stress from the internal pressure was evaluated according to the change in specific energy, depending on the value of the true strain established with the help of an optical–digital correlator on the outer surface, and the degree of damage was determined. It has been established that the specific fracture energy of 17G1S steel decreases by 70–90% under the influence of hydrogen. The effect of the change in the amount of strain energy on the thickness of the pipe wall is illustrated.

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Corrosion of Reinforce Bars in RC Constructions

Cited by 18 publications

References 20 publications

Comparison Crack Resistance of RC Beams with and without Transverse Reinforcement after Shear Testing

Comparison Crack Resistance of RC Beams with and without Transverse Reinforcement after Shear Testing

Corrosion of the S235JR Carbon Steel after Normalizing and Overheating Annealing in 2.5% Sulphuric Acid at Room Temperature

Evaluation of the Technical Condition of Pipes during the Transportation of Hydrogen Mixtures According to the Energy Approach

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