Relationship between concrete resistivity and corrosion rate – A literature review

Hornbostel, Karla; Larsen, Claus; Geiker, Mette Rica

doi:10.1016/j.cemconcomp.2013.03.019

Cited by 302 publications

(149 citation statements)

References 32 publications

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“…Lower permeability results from a finer pore network with less connectivity and eventually leads to higher electrical resistivity. The range spanned by resistivity is one of the greatest of any material property [12]. For concrete, it varies from 10 6 Ω⋅m for oven dried samples to 10 Ω⋅m for saturated concrete [13].…”

Section: Conceptmentioning

confidence: 99%

Electrical Resistivity of Concrete for Durability Evaluation: A Review

Azarsa

Gupta

2017

Advances in Materials Science and Engineering

229

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Degradation processes in reinforced concrete structures that affect durability are partially controlled by transport of aggressive ions through the concrete microstructure. Ions are charged and the ability of concrete to hold out against transfer of ions greatly relies on its electrical resistivity. Hence, a connection could be expected between electrical resistivity of concrete and the deterioration processes such as increase in permeability and corrosion of embedded steel. Through this paper, an extensive literature review has been done to address relationship between concrete electrical resistivity and its certain durability characteristics. These durability characteristics include chloride diffusivity and corrosion of reinforcement as these have major influence on concrete degradation process. Overall, there exists an inverse or direct proportional correlation between these parameters. Evaluated results, from measuring the concrete electrical resistivity, can also be used as a great indicator to identify early age characteristics of fresh concrete and for evaluation of its properties, determination of moisture content, connectivity of the micropores, and even condition assessment of in-service structures. This paper also reviews and assesses research concerning the influential parameters such as environmental conditions and presence of steel rebar and cracks on measuring electrical resistivity of concrete. Moreover, concrete resistivity concept, application, and its various measurement techniques are introduced.

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Section: Conceptmentioning

confidence: 99%

Electrical Resistivity of Concrete for Durability Evaluation: A Review

Azarsa

Gupta

2017

Advances in Materials Science and Engineering

229

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“…The presence of chloride in the environment increases the risk of pitting corrosion in these steels. When chlo ride levels are extremely high, the passive layer of the steel can be destroyed in large areas of the reinforcement and general corro sion takes place [3).…”

Section: Introductionmentioning

confidence: 99%

Corrugated stainless steels embedded in mortar for 9years: Corrosion results of non-carbonated, chloride-contaminated samples

Bautista

Paredes

Velasco

et al. 2015

Construction and Building Materials

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Institutional RepositoryThis is a postprint version of the following published document:A. Bautista (et al.). HI GHLIGHTS• 5 corrugated stainless steel grades are studied in chloride contaminated mortars.• Ecorr and E IS are used for monitoring, and polarizations tests are also carried out • Spo ntaneous corrosion only appears in low Ni austenitic 520430 at partial immersion.• 532205 duplex does not show any sign of corrosion even at anodic high polarizations. ABSTRA C T Keywords: Stainless steel Steel reinforced mortar EISMortar sampl es reinforced with 5 different corrugated stainless steels were tested for 9 years in 2 differ ent conditions: partial immersion (P I) in 3. 5% NaC l, and chloride addition to the mortar and exposure to high relative humidity (H R H) . The monitoring during the exposures was carried out with corrosi on potential (Ecorr) and electrochemical impedance spectroscopy (E IS) measurements. A year before finishing (after 8 years of exposure), the reinforced mortar samples were anodically polarised to obtain more infor mation about the pitting resistance of the passi ve layers formed under the different conditions. The last year of exposure was established to study the pr ogress or repassivation of the pits. The P I is the most aggressive testing condition and it causes low intensity corrosion in 520430 austenitic stainless steel after 7 years of exposure. The 532205 duplex stainless steel shows very good corrosion behaviour.

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“…Given the good correlation electrical resistivity has with other durability indicators (Ferreira, 2010;Hornbostel et al, 2013;Ferreira, 2000;Khater, 2011) this reflects the beneficial effect of metakaolin replacement.…”

Section: Electrical Resistivitymentioning

confidence: 91%

Effect of metakaolin on the chloride ingress properties of concrete

2015

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Research and practical experience have shown that partial replacement of cement by metakaolin improves concrete durability as a result of the refinement of the pore structure. While much research has been presented on concrete performance with metakaolin, it is scarce concerning the transport properties of chlorides in concrete with metakaolin, in natural conditions (i.e., un-accelerated). This study determines the chloride diffusion coefficients for several concretes with vary levels of cement replacement with metakaolin, and compares these results with chloride migration coefficients obtained from accelerated laboratory testing. In this study, two cement types (CEM I 42,5R and CEM IV/A 42,5) and two cement contents levels where used with metakaolin replacement levels varying from 10-20%. Concretes where tested for fresh properties, compressive strength, electrical resistivity, chloride ingress characteristics (natural diffusion and migration), and mercury intrusion porosimetry. The results show improved strength, durability properties and chloride penetration resistance of concretes with metakaolin. Furthermore, the use of metakaolin in fly ash concrete improves the early age performance of the concrete (<90 days), counteracting the delay in strength and durability gain typically associated with fly ash concrete. The results obtained from this study fulfil the lack of critical input for service life design models of reinforced concrete structures in chloride environments, with emphasis on concretes with metakaolin replacement.

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Relationship between concrete resistivity and corrosion rate – A literature review

Cited by 302 publications

References 32 publications

Electrical Resistivity of Concrete for Durability Evaluation: A Review

Electrical Resistivity of Concrete for Durability Evaluation: A Review

Corrugated stainless steels embedded in mortar for 9years: Corrosion results of non-carbonated, chloride-contaminated samples

Effect of metakaolin on the chloride ingress properties of concrete

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