Nondestructive Method for Estimation of Chloride Profiles: Correlation between Electrical Resistivity and Holliday-Empirical Equation

Balestra, Carlos Eduardo Tino; Reichert, Thiago Alessi; Savaris, Gustavo; Pansera, Wagner Alessandro; Medeiros-Junior, Ronaldo A.

doi:10.1061/(asce)co.1943-7862.0001907

Cited by 8 publications

(3 citation statements)

References 21 publications

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“…To increase the reliability of the conclusions, four different models available in the literature were used. The models used were the resolution of the error function of Fick's second law (Equation 2) [39], the modified Holliday equation (Equation 3) [40], [41], the FIB 34 model (Equation 4) [42], and the EHE-08 equation (Equation 5) [43]. The modified Holliday equation can model the peak region of chloride penetration in concrete, while the other three equations model only the chloride diffusion.…”

Section: Chloride Penetrationmentioning

confidence: 99%

Effect of duration and pressure of carbonation curing on the chloride profile in concrete

Dias

Beltrame

Gonzalez

et al. 2023

Rev. IBRACON Estrut. Mater.

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Carbonation curing alters the characteristics of the concrete's microstructure and can interfere with the penetration of aggressive ions. The objective of this article was to evaluate the influence of CO2 pressure and carbonation cure time on chloride profiles. Concrete specimens were cured by carbonation with CO2 pressures ranging from 5 to 25 Psi, for a time within the carbonation chamber of 8, 24, and 36 hours. These concretes were subjected to 30 wetting and drying cycles in NaCl solution to stimulate the chloride ingress. The carbonation depth and the microstructure of the concrete were monitored over time. Chloride profiles were obtained and modeled by 4 mathematical equations. The results showed that the combination of less time and CO2 pressure during carbonation curing potentiated the reduction of chloride penetration in concrete. Also, the carbonation curing conditions of 5 and 10 Psi for 8 hours reduced the chloride diffusion coefficient.

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Section: Chloride Penetrationmentioning

confidence: 99%

Effect of duration and pressure of carbonation curing on the chloride profile in concrete

Dias

Beltrame

Gonzalez

et al. 2023

Rev. IBRACON Estrut. Mater.

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“…Chlorides penetrate through the cementitious matrix mainly by diffusion (De Medeiros-Junior et al, 2015;Balestra et al, 2020). The unidirectional diffusion coefficient of each concrete type was obtained according to European Standard EN 12390-11 (AENOR, 2019).…”

Section: 21-chloride Diffusion Testmentioning

confidence: 99%

Effect of macrocell currents on rebar corrosion in reinforced concrete structures exposed to a marine environment

Lliso-Ferrando

Gasch²,

Martínez-Ibernón³

et al. 2022

Ocean Engineering

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“…Only few investigations had considered real-time corrosion monitoring incorporating nondestructive evaluations [23][24][25][26][27][28][29], but are limited to monitoring corrosion initiation and propagation assuming uniform mass loss and linear rate of corrosion with no possibility of obtaining the non-uniform degraded surface topography. These idealizations stem from the challenges involved in incorporating coupled interactions between structure and its local environment on a space-time frame in a 3D domain.…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of multi-physics numerical model in simulating accelerated corrosion with spatial and temporal non-uniformity

Shetty¹,

Banerjee²,

Tallur³

et al. 2022

Surf. Topogr.: Metrol. Prop.

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This study is motivated by the need to develop an efficient numerical model to simulate non-uniform interfacial degradation of reinforcing steel in concrete in an accelerated corrosion setup considering the influence of differential aeration, moisture and conductivity. In this study, a multi-physics finite element (FE) model is presented to simulate spatially and temporally non-uniform surface topography of corroding steel with rust layer, and eliminates the assumption of uniform mass loss and its linear variation with time as per available literature that uses classical approach of Faraday’s law. The model is validated experimentally with accelerated corrosion setup. Unlike previous studies, pore saturation (PS) is continuously monitored and its existing experimental correlations with conductivity and oxygen diffusivity are adopted so that the model can be extended to simulate natural corrosion to enhance the accuracy of service life predictions. These evaluations can be made completely nondestructive and in real-time eliminating the challenges in capturing the influence of environment by the use of alternative parameters such as relative humidity from real climate change predictions. The key findings from the investigation reveal that incorporating local environmental parameters measured in-situ allows for the model to naturally evolve with anodic and cathodic locations on steel surface avoiding the need to assume predefined locations. It is envisioned that the developed multi-physics FE model can be used as a reliable substitute to accelerated corrosion experiment which is frequently used for durability studies of corroding reinforced concrete (RC) members. It is shown that the daily and cumulative mass loss evaluated from the degraded surface topography of the corroded rebar using the simulated model are in good agreement with those evaluated experimentally. Further, the maximum pit depth evaluated from the simulated surface is validated that has valuable applications in estimating degraded strength of corroding steel and service life of RC members.

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Nondestructive Method for Estimation of Chloride Profiles: Correlation between Electrical Resistivity and Holliday-Empirical Equation

Cited by 8 publications

References 21 publications

Effect of duration and pressure of carbonation curing on the chloride profile in concrete

Effect of duration and pressure of carbonation curing on the chloride profile in concrete

Effect of macrocell currents on rebar corrosion in reinforced concrete structures exposed to a marine environment

Effectiveness of multi-physics numerical model in simulating accelerated corrosion with spatial and temporal non-uniformity

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