Corrosion behavior of steel reinforcement bars embedded in concrete exposed to chlorides: Effect of surface finish

Rivera-Corral, Jesus Octavio; Fajardo, G.; Arliguie, G.; Orozco-Cruz, Ricardo; Deby, Fabrice; Valdez, P.

doi:10.1016/j.conbuildmat.2017.04.186

Cited by 46 publications

(18 citation statements)

References 38 publications

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“…Commercial Q235 steel rebar (10 × 10 × 10 mm 3 , which contains 0.14–0.22 C, 0.30–0.65 Mn, <0.60 Si, <0.05 S, <0.045 P (wt%) and Fe balance) is used in this study. Before the experiment, the rebar specimens are polished, degreased ultrasonically, and then dried using the methods described in References [15,16]. All samples tested are immersed in a prepared solution (SCP with 3.5% NaCl) at ambient temperature and exposed to air.…”

Section: Experimental Methodsmentioning

confidence: 99%

Effect of Inhibitor on Adsorption Behavior and Mechanism of Micro-Zone Corrosion on Carbon Steel

Wang

Zhang

et al. 2019

Materials

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A new type of inhibitor is studied in this paper. Inhibition efficiency and adsorption behavior of an inhibitor film on the steel surface is tested via the electrochemical method and theoretical calculation to establish the adsorption model. Test results confirm that inhibition efficiency is improved with the addition of an inhibitor, and the inhibitor film is formed firmly by comparing the characteristic peaks of S and N. Moreover, the micro-zone corrosion progress of Fe in 3.5% invasive NaCl-simulated seawater environment is studied. The results further show that corrosion is initiated under the zone without the inhibitor film, while it is prevented under the protection of the film. By the experiments, it is shown that inhibitor can be adsorbed on the surface of steel stably and has excellent protection performance for reinforced rebar, which can be widely used in concrete structure.

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Section: Experimental Methodsmentioning

confidence: 99%

Effect of Inhibitor on Adsorption Behavior and Mechanism of Micro-Zone Corrosion on Carbon Steel

Wang

Zhang

et al. 2019

Materials

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“…It was also proven that the use of sludge water as the mixing water for concrete production will reduce the concrete strength and slump significantly [6]. Also, water having high amount of chloride is not appreciated for concrete mixing to prevent corrosion of reinforcement bars or prestressing strands, by chloride ions [7]. Water which possesses acidic properties tends to be more combative in action and it can be said that the higher the level of acidity of water used for mixing concrete, the higher the level of attack on concrete.…”

Section: Introductionmentioning

confidence: 99%

Rheological, Mineralogical and Strength Variability of Concrete due to Construction Water Impurities

Awoyera

Awobayikun

Gobinath

et al. 2020

JERA

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Various national and international standards recommend potable water for mixing concrete; however, the availability of potable water is virtually a daunting task in some developing communities. Concrete workers in such environments tend to utilize any available water for mixing concrete, and this may be detrimental to the quality of the concrete being produced. This study investigates the rheological, mineralogical and strength variability of concrete due to construction water impurities. Water samples were collected from four different construction sites within Southwestern region of Nigeria for production of concrete. The physical and chemical properties of the waters were determined so as to measure their rate of contamination, prior to their use for mixing concrete. The rheological properties of the fresh concrete, compressive strength, split tensile strength, and microscale features of hardened concrete, that were produced with each water sample were determined. From the results, the rheological features of concrete were found not to be affected by water impurities, however, the mechanical test results revealed about 10% reduction in strength between concrete made with water having least and higher concentration of impurities. Also, it was evident from the microscale tests that the water impurities do alter the hydration rate of concrete, which results in strength reduction. The study suggests pretreatment of concrete mixing water before use in order to avoid its damaging effect on concrete life.

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“…The epoxy solution only delays corrosion activation of the substrate steel in hot-dip zinc galvanized reinforcements. This delay is because the chloride concentration needed for acute corrosion in poorly alkaline carbonated concrete is quite low (0.29 wt.%) [21,[26][27][28][29] and expansive compounds, such as insoluble zinc, formed on the bar-concrete interface can cause concrete spalling, even before the appearance of red rust stains [30].…”

Section: Introductionmentioning

confidence: 99%

Bonding strength of stainless steel rebars in concretes exposed to marine environments

Calderon-Uriszar-Aldaca

Briz

Larrinaga

et al. 2018

Construction and Building Materials

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Corrosion behavior of steel reinforcement bars embedded in concrete exposed to chlorides: Effect of surface finish

Cited by 46 publications

References 38 publications

Effect of Inhibitor on Adsorption Behavior and Mechanism of Micro-Zone Corrosion on Carbon Steel

Effect of Inhibitor on Adsorption Behavior and Mechanism of Micro-Zone Corrosion on Carbon Steel

Rheological, Mineralogical and Strength Variability of Concrete due to Construction Water Impurities

Bonding strength of stainless steel rebars in concretes exposed to marine environments

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