Electrical resistivity measurements of Portland cement based materials

Hansson, I.; Hansson, C.M.

doi:10.1016/0008-8846(83)90057-1

Cited by 69 publications

(21 citation statements)

References 5 publications

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“…The improvement in the resistivity of pozzolanic concrete was due to the combination of filler and pozzolanic effects, which results in the pore refinement and higher density. In a similar study Hansson and Hansson [22] studied the electrical resistivity measurements of Portland cement based materials. They found that as the age increases the resistivity also increases due to the reduction of pore size by pozzolanic reactions in blended cements.…”

Section: Electrical Resistivity Studiesmentioning

confidence: 97%

Corrosion behaviour of blended cements in low and medium strength concretes

Dinakar

Babu²,

Santhanam

2007

Cement and Concrete Composites

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Section: Electrical Resistivity Studiesmentioning

confidence: 97%

Corrosion behaviour of blended cements in low and medium strength concretes

Dinakar

Babu²,

Santhanam

2007

Cement and Concrete Composites

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“…We attribute this difference essentially to . This significant evolution of electrical characteristics of the concrete A1 was already observed on concretes containing flying ashes (Hansson & Hansson, 1983). The concrete A2 does not present this evolution.…”

Section: Assessment Of Resistivity In Laboratorymentioning

confidence: 85%

Study of electrical resistivity: variability assessment on two concretes: protocol study in laboratory and assessment on site

Lataste

Larrard

Benboudjema

et al. 2012

European Journal of Environmental and Civil Engineering

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This article presents electrical resistivity measurement on concrete. The first part presents the study of a lighter protocol for measuring electrical resistivity, allowing investigations of a large number of specimens, without degradation of the quality of final results. The second part is based on measurements made on two concretes cast regularly during one year each, on two sites. Measurements done to assess the different variability sources distinguish variability linked to the measurement of those related to the material. The third part of the article compares the laboratory measurements to those made on site. Finally, all the results reflected the interests of the resistivity measurement because of low variability obtained, and consistency between results.Les travaux présentés portent sur la mesure de résistivité électrique sur les bétons. Une première partie présente l'étude d'un protocole de mesure électrique allégé, qui a permis de traiter un grand nombre d'éprouvette sans que la qualité finale des résultats n'en soit altérée. La seconde partie repose sur les mesures faites sur deux bétons coulés régulièrement sur deux chantiers durant une année. Les mesures réalisées permettent d'évaluer les différentes sources de variabilité des résistivités en distinguant les variabilités inhérentes à la mesure de celles liées au matériau. Une troisième partie de l'article confronte les mesures en laboratoires à celles réalisées sur site. L'ensemble des résultats traduit finalement l'intérêt de la mesure de résistivité du fait des faibles niveaux de variabilités obtenus, et de leur cohérence entre les différents résultats.

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“…The conventional penetration methods to determine final setting and hardening (ASTM, 2008a(ASTM, , 2008b were not applicable to dry mix concrete. As an alternative to penetration methods, electrical resistivity methods have been used to study the hydration process (El-Enein et al, 1995;Hansson and Hansson, 1983;McCarter and Afshar, 1988). A non-contact electrical resistivity measurement (NC-ERM) method was also developed (Li and Li, 2003), which allowed the measurement of hydration of fresh cement and concrete from its early age without inserting electrical probes into the sample.…”

Section: Introductionmentioning

confidence: 99%

Characterising cement carbonation curing using non-contact electrical resistivity measurement

Morshed

Azar

Shao

2015

Advances in Cement Research

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Carbonation curing of cement paste and concrete promotes early strength gain, improves durability and recycles carbon dioxide in a beneficial manner. To examine the carbonation curing mechanism, fresh cement pastes and concretes subject to carbonation are characterised using a non-contact electrical resistivity measurement method.Resistivity measurements reveal that characteristic features of the hydration accelerated by carbonation are different from conventional hydration. The typical induction period is absent in the carbonation curing owing to the rapid precipitation of calcium carbonate. The resistivity measurement method produces a superimposed result of early hardening and multiple instances of progressive hardening by carbonation curing. The electrical resistivity is 3-6 times higher in the carbonated cement paste and about 8-16 times higher in the carbonated concretes in comparison with the hydration references. The carbonated lightweight concrete shows lower bulk resistivity than the carbonated normal-weight concrete, possibly owing to the release of internal water from the lightweight aggregates during carbonation. This is evidence of internal curing by lightweight aggregates.

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Electrical resistivity measurements of Portland cement based materials

Cited by 69 publications

References 5 publications

Corrosion behaviour of blended cements in low and medium strength concretes

Corrosion behaviour of blended cements in low and medium strength concretes

Study of electrical resistivity: variability assessment on two concretes: protocol study in laboratory and assessment on site

Characterising cement carbonation curing using non-contact electrical resistivity measurement

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