Corrosion effects on the bond behaviour of steel bars in self-compacting concrete

Al-Sibahy, Adnan; Sabhan, Maha

doi:10.1016/j.conbuildmat.2020.118568

Cited by 16 publications

(6 citation statements)

References 11 publications

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“…The test method for assessing the bonding performances of the GFRP bars with concrete included an articulated beam bending test and a pulling test based on pulling in a well-anchored concrete block or column (Al-Sibahy and Sabhan, 2020;Esmaeili et al, 2020;Rossi et al, 2020). Zheng et al (Zheng et al, 2016) conducted a comparative study based on beam and pull-out tests.…”

Section: Test Methodsmentioning

confidence: 99%

The effect of pore characteristics on the bonding properties of steam-cured concrete and GFRP bars

et al. 2023

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Steam cured concrete prefabricated components has the advantages of short construction period, less environmental pollution, convenient construction and low cost, and is widely used in high-speed railway projects. However, the changes of later strength, capillary water absorption and pore distribution led to the reduction of durability of steam-curing concrete and accelerated the damage speed of GFRP bars and bond performance between concrete and GFRP bars. In this study, the method of steam curing is adopted to simulate the damage of components caused by actual steam curing environment. The influence of pore characteristics on the bonding properties of steam cured concrete and GFRP steel bar is analyzed from both micro and macro perspectives. Analysis method combining pore characteristics with bonding strength. The test results showed that the hydration products of concrete were unaffected, but the density of the hydration products changed due to the steam curing. The porosity of the steam-cured concrete was much higher than that of the standard-cured concrete. The number of gel pores smaller than 20 nm accounted for 12.27% of the total number of pores on average, which was about twice the proportion of the gel pores of this size in the standard-cured concrete. The proportion of harmful voids with pore size of 50–200 nm and greater than 200 nm is higher than that of standard curing concrete. The bond strength of the steam-cured concrete and GFRP bars was 30% lower than that of the standard-cured concrete. With the change of the thickness of the concrete cover and the diameter of GFRP bars, the bond strength changed significantly. Based on the analysis of the test data, a predictive model of the bond strength deterioration for the steam-cured concrete and GFRP bars was established. The model fully accounted for influence factors such as the porosity, diameter, anchor length, and concrete strength.

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Section: Test Methodsmentioning

confidence: 99%

The effect of pore characteristics on the bonding properties of steam-cured concrete and GFRP bars

et al. 2023

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“…Nelly Majain (11)(2020) conducted an experiment on the pull test of 12mm, 16mm, and 20mm bars embedded in a 200mm cube with steel fibres. Adnan Al-Sibahy et al (14)(2020) investigated bond strength degradation caused by corrosion of steel bars implanted in the SCC, as well as variations in bond strength behaviour. Giacomo Torelli et al (15)(2020) looked at cement low weight concrete that may be simply layered into forms.…”

Section: Literature Reviewmentioning

confidence: 99%

Regression Anaylsis for the Experimental Study on the Pullout Strength of Steel Fiber Self- Compacting Concrete

2023

IJFMR

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This article describes experimental research of the interfacial adhesion of triple blended steel fibre self-compacting concrete (TBSFSCC) and it varies depending on the percentage of steel fibre. In self-compacting concrete, mineral admixtures such as condensed silica fume and flyash are utilised as supplementary cementitious materials (SCMs).the percentage of replacement of cement by condensed silica fume at 10 where as flyash at 20 respectively, to meet the SCC criteria stipulated by ACI. The embedment length of a steel bar with a diameter of 12mm was chosen to be 100mm in all of the standard specimens. Fe-415 steel rod is used in this research. The pull-out test in the universal testing machine is used to evaluate the bond strength of this triple blended Self-Compacting Concrete (TBSCC). Ordinary steel fibres are then added to the concrete volume at various percentages, such as 0.2, 0.4, 0.6, and 0.8. The bond strength, slip, and the method of failure of each rebar were all noted in the test results. The comparison of these results clearly shows that the percentage of steel fibre contributes to the TBSCC bond strength, and conclusions are generated.

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“…The chloride in seawater or sand can easily corrode the passive film of the steel bars, leading to the corrosion of the steel bars. Following reinforcement corrosion, the rust on the steel bars can induce cracks in the concrete, resulting in concrete damage [13]. As described in Suzuki's research [14], Zinc-Coated Steels corroded seriously when they were applied in corrosive seawater environments.…”

Section: Introductionmentioning

confidence: 98%

Influence of Rust Inhibitor on the Corrosion Resistance of Reinforcement in Cement Paste with Chloride

Zhang

et al. 2021

Coatings

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The electrical resistance and polarization effect of cement paste containing reinforcement were tested to research the anti-corrosion properties of steel bars in cement paste. Moreover, the microstructure and composition of passivation film and rust on the steel bars were studied. The water–cement ratio of the cement paste in this study was 0.3, with 0.5% NaCl, 1% NaNO2, and 1% Benzotriazole, and an assembly unit of 0.5% NaNO2 + 0.5% Benzotriazole by mass of cement was added to the cement to provide a chloride environment. X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM) were applied to research the composition of the passivation film and the microstructure of the cement paste, respectively. The results indicated that the samples with the assembly unit of 0.5% NaNO2 + 0.5% Benzotriazole showed the highest electrical resistance and polarization electrical resistance, while the specimens with 1.0% Benzotriazole showed the lowest electrical resistance and polarization electrical resistance. Moreover, the passivation film of steel bars weakened with increasing distance from the surface of the steel bars. Therefore, the corrosion of steel bars becomes more serious with increasing distance. Finally, the influence of the rust inhibitor on the corrosion resistance of steel bars in the specimens decreased in the following order: 0.5% NaNO2 + 0.5% Benzotriazole >1.0% NaNO2>1.0% Benzotriazole.

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Corrosion effects on the bond behaviour of steel bars in self-compacting concrete

Cited by 16 publications

References 11 publications

The effect of pore characteristics on the bonding properties of steam-cured concrete and GFRP bars

The effect of pore characteristics on the bonding properties of steam-cured concrete and GFRP bars

Regression Anaylsis for the Experimental Study on the Pullout Strength of Steel Fiber Self- Compacting Concrete

Influence of Rust Inhibitor on the Corrosion Resistance of Reinforcement in Cement Paste with Chloride

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