Field monitoring of electrical conductivity of cover-zone concrete

McCarter, William John; Chrisp, T. M.; Starrs, G.; Basheer, Pam; Blewett, J.

doi:10.1016/j.cemconcomp.2005.03.008

Cited by 54 publications

(34 citation statements)

References 6 publications

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“…It was found that the above equation is only applicable over a limited interval of ±5 ∘ C to the reference temperature [45,88,91]. A model developed in DuraCrete [92] also describes the correlation between at temperature ( ∘ C) and resistivity 20 at 20 ∘ C:…”

Section: Effect Of Temperaturementioning

confidence: 99%

“…where is characteristic value of the temperature factor for resistivity and is defined as Several researchers also defined a wide agreement for this correlation using Arrhenius law [41,45,87,88,91,93]:…”

Section: Effect Of Temperaturementioning

confidence: 99%

“…For simplicity, a change of 3% to 5% on resistivity measurements per ∘ C has been recommended for temperature range of 0 ∘ C to 40 ∘ C [7,67]. A linear relationship has been developed on temperature dependency of resistivity [45,88,91]:…”

Section: Effect Of Temperaturementioning

confidence: 99%

See 2 more Smart Citations

Electrical Resistivity of Concrete for Durability Evaluation: A Review

Azarsa

Gupta

2017

Advances in Materials Science and Engineering

226

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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: Effect Of Temperaturementioning

confidence: 99%

Section: Effect Of Temperaturementioning

confidence: 99%

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Electrical Resistivity of Concrete for Durability Evaluation: A Review

Azarsa

Gupta

2017

Advances in Materials Science and Engineering

226

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“…It is well known that many parameters, such as the composition of the interstitial fluid and its concentration, porosity, saturation level, mineralogy (dimension and shape of the particles), the internal structure (pore distribution, pore shape and degree of cementing) and temperature, may affect the EC of a saturated system [4][5][6][7][8][9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Non-destructive Electrical Methods for Measuring the Physical Characteristics of Porous Materials

2015

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The durability of reinforced concrete structures, built on the seafront, has been at the heart of recent concerns. Indeed, chloride transport across the porosity of concrete coating produces medium to long-term corrosion of reinforcements. This has a direct impact on the mechanical behavior and the ageing of the affected structures. The difficulty of in situ monitoring of these structures, continuously and non-destructively against infiltration of chlorides, is still topical. The work presented here aims mainly at correlating the electrical properties, i.e. electrical resistance, conductivity…, with the physical characteristics (porosity, tortuosity, ...), of granular materials using Archie's law. The recommended experimental program consists in placing, different granular materials, i.e. sand, mortar, bricks, and concretes saturated with electrolytic solutions, in a PVC cell fitted with a pair of stainless steel electrodes connected to an electrical circuit, in order to measure the electrical resistances. The results obtained allow one to determine durability factors, such as the connected porosity and the coefficient of chloride diffusion through a simple measurement of the EC, and estimate the tortuosity parameter that governs transport in porous media.

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“…Testing methods like ASTM C1585-04, the standard test method for measurement of rate of absorption of water by hydraulic-cement concretes, assess absorption by an overall change in sample mass (McCarter et al, 2005;Rajabipour et al, 2005). The procedure described in this paper is based on using a change in X-ray transmission/attenuation to measure the time dependent movement of fluid in the region around the crack.…”

Section: Introductionmentioning

confidence: 99%

Using X-ray transmission/attenuation to quantify fluid absorption in cracked concrete

Weiss

Hansen

2015

IJMSI

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Abstract:Cracks can alter the rate of fluid transport in concrete. Unfortunately, however, quantitative information is lacking to provide definitive statements regarding the extent to which cracks reduce durability or long-term performance. This paper describes a study that used X-ray transmission/attenuation to determine the influence of cracking on the absorption of fluid in concrete. Specifically, an experimental method is presented which uses a wedge splitting test to pre-crack specimens. These pre-cracked specimens were dried and ponded with water. At various times after the start of water ponding, X-ray attenuation measurements were taken using a grid of points around the crack. By repeating this measurement and comparing the change in X-ray transmission/attenuation, the ingress of the fluid could be determined by locating the position of the moisture front. An approach is presented to determine the geometry of the crack by using water absorption perimeter measurements of the wetting front in the concrete.

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Field monitoring of electrical conductivity of cover-zone concrete

Cited by 54 publications

References 6 publications

Electrical Resistivity of Concrete for Durability Evaluation: A Review

Electrical Resistivity of Concrete for Durability Evaluation: A Review

Non-destructive Electrical Methods for Measuring the Physical Characteristics of Porous Materials

Using X-ray transmission/attenuation to quantify fluid absorption in cracked concrete

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