Electrochemical investigation on the influence of sulfates on chloride-induced corrosion of steel bar in cement-based materials

Abubakar, Abubakar Fu'ad; Zuo, Xiao-Bao; Zou, Shuai; Ayinde, Olawale Olatunde; Aliyu, Ahmad Mubarak

doi:10.1080/21650373.2019.1709998

Cited by 11 publications

(2 citation statements)

References 46 publications

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“…Concrete structures in northern China encounter complex service environments during their service life [1]. The factors affecting the durability of concrete structures usually include freeze-thaw cycles (FTCs), steel bar corrosion (SBC) and external loads, which alone or alternately lead to the deterioration of the mechanical properties of concrete structures [2].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Freeze–Thaw Cycles and Corrosion on Reinforced Concrete and the Relationship between the Evolutions of the Microstructure and Mechanical Properties

Zhang

Tian²,

Chen³

et al. 2022

Materials

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Freeze–thaw cycles (FTCs) and steel bar corrosion (SBC) are the most common service conditions of hydraulic concrete and have significant impacts on its durability. Using pullout and microscopic tests of different FTC and SBC rates, we selected the mass loss rate, ultrasonic velocity, bond strength and bond slip in order to describe the changes in the macro-properties, and also selected the porosity and pore size distribution as micro-parameters in order to explore the influence of FTCs and SBC on the mechanical properties of hydraulic concrete. The results showed that the bond strength decreased as the FTCs increased due to the microstructure damage caused by FTC and SBC, which affects the mechanical properties. A corrosion rate of ≤3% offset the damage caused by 50 FTCs. FTCs and SBC resulted in superimposed damage effects on the concrete. In addition, we established a bond strength damage model based on the joint FTCs and SBC and quantitatively described the degradation law of the macro-mechanical properties. The analysis shows that the influence of FTCs on the bond strength was greater than that of the SBC. These research results can provide a reference and experimental support for the frost-resistant design and durability prediction of hydraulic concrete structures in cold environments.

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Section: Introductionmentioning

confidence: 99%

The Influence of Freeze–Thaw Cycles and Corrosion on Reinforced Concrete and the Relationship between the Evolutions of the Microstructure and Mechanical Properties

Zhang

Tian²,

Chen³

et al. 2022

Materials

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“…Hydraulic concrete structures in contact with acidic water are susceptible to the chemical erosion due to the porousness of concrete [12]. e chloride and sulfate ions can transfer into pores and react with steel reinforcement passivation film, leading to damage and corrosion of reinforced concrete [13,14].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Freeze‐Thaw Damage on Corrosion in Reinforced Concrete

Guan

Chen

et al. 2021

Advances in Materials Science and Engineering

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The existing studies of the corrosion of reinforced concrete have mainly focused on the interface area and chemical ion erosion, ignoring the specific service environment of the reinforced concrete. In this study, the effect of freeze-thaw damage was investigated via corrosion experiments under different freeze-thaw cycle conditions. Steel reinforcement corrosion mass, ultimate pull-out force, corrosion rate, and bond slippage were chosen as characteristic parameters in the experiments, and scanning electron microscopy (SEM) analysis was used to explain the mechanism of action of freeze-thaw damage on corrosion. The results showed that, under identical corrosion conditions, the mass of steel reinforcement corrosion and corrosion rate increased by 39.6% and 39.7% when comparing 200 freeze-thaw cycles to 0 cycles, respectively. The ultimate pull-out force and bond slippage after 200 freeze-thaw cycles decreased by 73% and 31%, respectively, compared with 0 freeze-thaw cycles. In addition, SEM analysis indicated that microstructure damage caused by freeze-thaw cycles accelerated the corrosion reaction and decreased cementitious properties, leading to decreasing ultimate pull-out force and bond slippage. The effect of freeze-thaw cycles and steel reinforcement corrosion on the macro mechanical properties of concrete is not a simple superposition.

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Mesoscale modeling of chloride transport in unsaturated concrete based on Voronoi tessellation

Song

2022

Cement and Concrete Research

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Electrochemical investigation on the influence of sulfates on chloride-induced corrosion of steel bar in cement-based materials

Cited by 11 publications

References 46 publications

The Influence of Freeze–Thaw Cycles and Corrosion on Reinforced Concrete and the Relationship between the Evolutions of the Microstructure and Mechanical Properties

The Influence of Freeze–Thaw Cycles and Corrosion on Reinforced Concrete and the Relationship between the Evolutions of the Microstructure and Mechanical Properties

The Effect of Freeze‐Thaw Damage on Corrosion in Reinforced Concrete

Mesoscale modeling of chloride transport in unsaturated concrete based on Voronoi tessellation

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