Electrical conductivity of Portland cement mortars

Tumidajski, Peter J.

doi:10.1016/0008-8846(96)00027-0

Cited by 59 publications

(23 citation statements)

References 5 publications

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“…Electrical conductivity values of the interfacial zone from fine aggregate are almost the same as those of the paste [10]. This relationship is poorly affected by an increase in water to cement ratio (w/c) [11].…”

Section: Introductionmentioning

confidence: 52%

“…Therefore, the theoretical model, consequent with non conductive particles (aggregate) in a conductive matrix (paste), implies the electrical current redirected around aggregates. The interfacial zone formed between the matrix and the coarse aggregate constitutes a third phase more porous than the matrix [10]. Although coarse aggregate addition does not affect the shape of the adsorption isotherm of water vapor [13], a quantitative change is produced in accordance with the volume of the interfacial zone.…”

Section: Introductionmentioning

confidence: 99%

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Influence of temperature and humidity on Portland cement mortar resistivity monitored with inner sensors

Zaccardi

Garcia

Huélamo

et al. 2009

Materials & Corrosion

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Concrete resistivity is directly related to relative humidity (RH) and is also affected by temperature. In this paper, a theoretical discussion about how these two factors affect resistivities of concrete and mortar is provided. Moreover, experimental results on sensorized mortar probes are presented and correlated to analytical models of temperature and humidity influences. All measurements were performed under controlled conditions. Temperature, RH, and resistivity were measured simultaneously in a particular zone of the probes. Temperature scanning was performed over short periods of time (approximately 1 h) and the probes were covered with waterproof paraffin each time for constant humidity content. This was feasible as all sensors were embedded. Water contents were ensured during the experiment by weighting the probes. Conclusions on the applicability of these techniques, their advantages, and limitations, and correlation to Archie and Arrhenius laws of the results are made.

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Section: Introductionmentioning

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Influence of temperature and humidity on Portland cement mortar resistivity monitored with inner sensors

Zaccardi

Garcia

Huélamo

et al. 2009

Materials & Corrosion

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“…Electrical resistivity measurement has been applied to determine the time of setting and hardening, and the influence of different admixtures [14][15][16] . The advanced work includes the prediction of hydration and conductivity by computer modeling [17] , which is shown in Tumidajski et al [18] . Li et al [16] found that the relationship between porosity and electrical resistivity in cementitious systems follows Archie's law [19] .…”

Section: Introductionmentioning

confidence: 99%

Electrical measurement to assess hydration process and the porosity formation

Wei

Xiao

2008

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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The change of electrical resistivity with time at early ages was used to investigate the hydration process and the porosity development. Porosity reduction process of cement-based materials hydration was developed by a proposed method. The porosity reduction is fast at the setting period. The results find that the pore discontinuity occurs faster at lower water/cement ratios than at higher water/cement ratios which is similar to the results of the Percolation method.

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“…Electrical conductivity may be different for concretes or mortars as inert materials can be considered as "insulating" materials [18].…”

Section: Methodsmentioning

confidence: 99%

Effects of limestone fillers on surface free energy and electrical conductivity of the interstitial solution of cement mixes

Courard

Michel

Perkowicz

et al. 2014

Cement and Concrete Composites

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Most of concrete formulations actually contain mineral additives that are used as an inert filler or supplementary cementitious material (as type II addition). These materials are generally used in order to increase concrete performances both in its fresh and hardened states. The mineral additives usually improve the consistency and workability of fresh concrete and reduce the water demand for a required concrete slump because of an additional volume of fines. The way of action depends on the physical and chemical characteristics of fillers. The study of surface free energies and electric conductivities of interstitial solutions of cement mixes modified by blast furnace slags and limestone fillers contributes to a better knowledge of hardening and interaction process.

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Electrical conductivity of Portland cement mortars

Cited by 59 publications

References 5 publications

Influence of temperature and humidity on Portland cement mortar resistivity monitored with inner sensors

Influence of temperature and humidity on Portland cement mortar resistivity monitored with inner sensors

Electrical measurement to assess hydration process and the porosity formation

Effects of limestone fillers on surface free energy and electrical conductivity of the interstitial solution of cement mixes

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