Predicting the Durability of Concrete Structures, including Sulfate Corrosion of Concrete

Сорокин, Е. В.; Yudina, Olga; Selyaev, V.P.; Neverov, V. A.; Selyaev, Pavel Vladimirovich

doi:10.5862/mce.45.5

Cited by 8 publications

(4 citation statements)

References 4 publications

(2 reference statements)

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“…Nevertheless, the innate hydrophilic properties of cementitious materials render them vulnerable to the ingress of corrosive agents utilizing water as a medium, consequently compromising their longevity. The hydrophilic characteristic inherent to cement-based materials frequently result in various challenges, including the accumulation of dust [2,3], deterioration due to freeze-thaw cycles [4,5], corrosion caused by chloride salts [6][7][8], sulfate-induced corrosion [9,10], and the corrosion of reinforcement [11,12]. Structures situated in specific environments, notably those characterized by high humidity, exhibit an elevated susceptibility to premature structural failure.…”

Section: Introductionmentioning

confidence: 99%

Research on the Performance of Superhydrophobic Cement-Based Materials Based on Composite Hydrophobic Agents

Luo,

Xu,

Chu

et al. 2023

Materials

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The utilization of a novel monolithic superhydrophobic cement material effectively prevents water infiltration and enhances the longevity of the material. A method for improving superhydrophobic concrete was investigated with the aim of increasing its strength and reducing its cost by compounding superhydrophobic substances with water repellents. The experimental tests encompassed the assessment of the compressive strength, contact angle, and water absorption of the superhydrophobic cementitious materials. The findings demonstrate that an increase in the dosage of isobutyltriethoxysilane (IBTES) progressively enhances the contact angle of the specimen, but significantly diminishes its compressive strength. The contact angle of SIKS mirrors that of SIS3, with a superior compressive strength that is 68% higher. Moreover, superhydrophobicity directly influences the water absorption of cementitious materials, with a more pronounced superhydrophobic effect leading to a lower water absorption rate. The water absorption of cementitious materials is influenced by the combined effect of porosity and superhydrophobicity. Furthermore, FT−IR tests unveil functional mappings, such as -CH3 which can reduce the surface energy of materials, signifying successful modification with hydrophobic substances.

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Section: Introductionmentioning

confidence: 99%

Research on the Performance of Superhydrophobic Cement-Based Materials Based on Composite Hydrophobic Agents

Luo,

Xu,

Chu

et al. 2023

Materials

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“…Based on experimental data on the resistance of reinforced concrete elements under the influence of aggressive media, Bondareko et al [7] and Selyaev et al [8] proposed phenomenological degradation functions that allow modeling the deformation of reinforced concrete elements damaged with corrosion. Such degradation functions allow estimation of the residual life of structures.…”

Section: Introductionmentioning

confidence: 99%

Exposure of the load capacity of the RC structural system under corrosion damage to columns

Kolchunov

Savin

2023

J Appl Eng Science

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A number of accidents, such as the partial collapse of a residential building in Surfside on June 24, 2021, or the collapse of the roof structure of Basmanny Market in Moscow on February 23, 2006, show that aggressive medium impacts on reinforced concrete structures lead over time to a decrease in their strength resistance resource under accidental impacts. At the same time, the investigations in this field mainly deal with structural members under bending, while eccentrically compressed and corroded reinforced concrete members have been considered either in particular aspects or the obtained solutions are rather complicated for their practical application. In this regard, the purpose of the article was to assess the influence of the corroded depth on the load capacity of eccentrically compressed reinforced concrete columns of structural frames, as well as to predict the time of exhaustion of their load capacity under constant serviceable loads. The paper adopted the phenomenological model of V.M. Bondarenko to take into account long-term corrosion processes. It had been established that an increase in the corroded depth leads to a decrease in the load capacity of eccentrically compressed reinforced concrete members due to a decrease in the effective cross-sectional depth and effective slenderness ratio. The relative depth of the destroyed concrete varies depending on the current stress-strain state of the structural member. The time to reach the critical corroded depth depends significantly on the parameters of aggressive medium and the stress-strain state of the structural member and may differ by several times when implementing avalanche or descending damage kinetics.

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“…The risk of corrosion increases as chloride content in the concrete increases. Corrosion process occurs, when chloride content on steel surface exceeds a certain limit [4][5][6][7].…”

Section: Chloride Corrosionmentioning

confidence: 99%

Determination of the neutralization depth of concrete under the aggressive environment influence

2018

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Abstract. Aggressive environments have a significant impact on destruction of many reinforced concrete structures, such as high-rise constructions or chemical plants. For example, some high-rise constructions are equipped with a swimming pool, so they are exposed to chloride ions in the air. Penetration of aggressive chemical substances into the body of concrete contributes to acceleration of reinforced concrete structure corrosion that in turn leads to load bearing capacity loss and destruction of the building. The article considers and analyzes the main technologies for calculating penetration depth of various aggressive substances into the body of concrete. The calculation of corrosion depth was made for 50-year service life.

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Predicting the Durability of Concrete Structures, including Sulfate Corrosion of Concrete

Cited by 8 publications

References 4 publications

Research on the Performance of Superhydrophobic Cement-Based Materials Based on Composite Hydrophobic Agents

Research on the Performance of Superhydrophobic Cement-Based Materials Based on Composite Hydrophobic Agents

Exposure of the load capacity of the RC structural system under corrosion damage to columns

Determination of the neutralization depth of concrete under the aggressive environment influence

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