Temperature and humidity influences on the on-site active marine corrosion of reinforced concrete elements

Zaccardi, Yury Villagrán; Bertora, Andrea; Maio, Ángel Antonio Di

doi:10.1617/s11527-012-9994-z

Cited by 21 publications

(4 citation statements)

References 8 publications

(9 reference statements)

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“…As both parameters can strongly vary, even over a single day, a measurement procedure must be defined for the accurate extrapolation of instantaneous measurements to annual corrosion rates and to incorporate the RH and T changes into service life models [448][449][450]. One solution is to carry out several measurements at specific times with very different conditions, at least four-times a year, to study the seasonal cycle for calculating an average value.…”

Section: Limitation On the Evaluation Of Corrosion Rate And Interest Of Combining Ndt Methodsmentioning

confidence: 99%

Reinforced concrete structures: A review of corrosion mechanisms and advances in electrical methods for corrosion monitoring

Rodrigues

Gaboreau

Gance

et al. 2021

Construction and Building Materials

184

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Steel corrosion is the main cause of deterioration of reinforced concrete (RC) structures. We provide an up-to-date review on corrosion mechanisms and recent advances in electrical methods for corrosion monitoring. When assessing corrosion mechanism, the inherent heterogeneity of RC structures and the significant effect of environmental factors remain major issues in data interpretations. The steel surface condition and local inhomogeneities at the steel-concrete interface appear to have an important effect on corrosion initiation. Considering uniform corrosion in atmospherically exposed reinforced concrete, the two main influencing factors of the corrosion process are the water content and the pore structure at the steel-concrete interface. However, irrespective of the depassivation mechanism, i.e. carbonation or chloride-induced corrosion, nonuniform corrosion is expected to be the main process for RC structures due to local variations in environmental exposure or the presence of interconnected rebars with different properties. Future studies may then be focused on their effect on macrocell corrosion to gain further insights in the corrosion mechanisms of RC structures. Concerning corrosion monitoring using electrical methods, the half-cell potential technique with potential mapping is accurate for locating areas with a high corrosion risk. Recent developments in the measurement of concrete resistivity have shown that the use of electrical resistivity tomography allows to consider appropriately the inherent heterogeneity of concrete and provides more insights on transport phenomena (e.g. water and salts ingress) in the material. Nevertheless, during the corrosion propagation stage, the polarization resistance remains the most important parameter to be determined as it provides quantitative information of the corrosion rate. If conventional three-electrode configuration methods can supply an accurate determination in the case of uniform corrosion, they often fail in the case of macrocell corrosion in field experiments. Recent advances have shown that a four-electrode configuration without any connection to the rebar can rather be used for the non-destructive testing and evaluation of corrosion. If studies are still required to quantify the corrosion rate, this method appears sensitive to localized corrosion and thus more suitable to field investigations. Finally, the coupling of numerical simulations with complementary electrical and other non-destructive testing methods is essential for consolidating the results to provide a better diagnosis of the service life of RC structures.

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Section: Limitation On the Evaluation Of Corrosion Rate And Interest Of Combining Ndt Methodsmentioning

confidence: 99%

Reinforced concrete structures: A review of corrosion mechanisms and advances in electrical methods for corrosion monitoring

Rodrigues

Gaboreau

Gance

et al. 2021

Construction and Building Materials

184

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“…Several researchers have concluded that the chloride ion erosion rate increases with temperature when the environmental temperature is below 40 degrees Celsius [27][28][29].…”

Section: Marine Environmental Chamber Control Parametersmentioning

confidence: 99%

Experimental Study on the Relationship between the Natural Frequency and the Corrosion in Reinforced Concrete Beams

Zhang

Sun

Dong³

2021

Advances in Materials Science and Engineering

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Due to many nondamage factors such as temperature, humidity, carbonation, and corrosion effects on natural frequency, the key problem of the application frequency-based method to detect damage is to reveal the rules of these factors affect natural frequency and further to eliminate their effects. The long-term characteristics of reinforced concrete structures require a lot of attention, especially in corrosive environment. In this paper, an experimental investigation was conducted to study the deflection and natural frequency of reinforced concrete beam in a marine environmental chamber for six corrosion stages (accelerated corrosion for 0, 20, 40, 70, 100, and 140 days). The experimental results demonstrated that deflection increases with corrosion time, while natural frequency decreases with corrosion time. Based on the accelerate corrosion test data of reinforced concrete beams, the general expression of the relationship between corrosion depth and natural frequency has been established through the fitting curve method. The polynomial model has been selected for establishing the relationship between steel corrosion depth (including the main reinforcement and stirrup) and natural frequency. The reason for selecting the polynomial model is that the sum of squares due to error (SSE) is closer to 0 and the coefficient of multiple determination (R-square) is closer to 1. This investigations help to discriminate the cause of reinforced concrete beams natural frequency change, to eliminate nondamage factors affects, and to apply many structural damage identification methods effectively.

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“…(3) Relative humidity has a decisive influence on the degree of exposure to the sea atmosphere. Zaccardi et al [24] have studied the influence of ambient temperature and relative humidity in the corrosion of reinforcing bars in RC structures in a marine environment. Bouteiller et al [25] demonstrated that temperature and humidity interact with each other in the corrosion processes.…”

Section: Influence Of the Marine Atmosphere On Rc Building Structuresmentioning

confidence: 99%

Exposure of RC building structures to the marine environment of the Valencia coast

Moreno

Pellicer

Adam

et al. 2018

Journal of Building Engineering

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As the marine atmosphere is very harmful to reinforced concrete (RC) structures, buildings situated close to the sea are at a high risk of suffering damage. Such is the case of many of the buildings near the coast in Valencia (Spain). Most of these buildings were built between 1968 and 2007 and nowadays their RC structures are seriously damaged. This paper describes the condition of 1816 buildings that were inspected in 14 towns placed in Valencia coast. From these inspections, there have been identified the main factors which are the most significant in the damage of these RC structures by the aggressive marine conditions. These factors include environmental characteristics, urban parameters and construction system of the buildings.

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Temperature and humidity influences on the on-site active marine corrosion of reinforced concrete elements

Cited by 21 publications

References 8 publications

Reinforced concrete structures: A review of corrosion mechanisms and advances in electrical methods for corrosion monitoring

Reinforced concrete structures: A review of corrosion mechanisms and advances in electrical methods for corrosion monitoring

Experimental Study on the Relationship between the Natural Frequency and the Corrosion in Reinforced Concrete Beams

Exposure of RC building structures to the marine environment of the Valencia coast

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