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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Suryanto, Benny
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Topics
Publications (19/19 displayed)
- 2024Probabilistic approach to the sustainability assessment of reinforced concrete structures in conditions of climate changecitations
- 2023Features of Immittance Spectra as Performance Indicators for Cement-Based Concretescitations
- 2021The electro-mechanical tensile properties of an engineered cementitious compositecitations
- 2021Low Carbon Recycled Aggregate Concrete
- 2021Cover-zone protective qualities under corrosive environmentscitations
- 2020Moisture movement within concrete exposed to simulated hot arid/semi-arid conditionscitations
- 2020Assessing the performance and transport properties of concrete using electrical property measurementscitations
- 2019Conduction, relaxation and complex impedance studies on Portland cement mortars during freezing and thawingcitations
- 2019In-Situ Conductivity Measurements to Monitor Moisture Profiles of Concrete in Hot Climates
- 2018Impedance measurements on an engineered cementitious composite: a critical evaluation of testing protocolscitations
- 2018Performance assessment of reinforced concrete after long-term exposure to a marine environmentcitations
- 2018Transient moisture profiles in cover-zone concrete during water absorptioncitations
- 2017Characterization of fly-ash using electrochemical impedance spectroscopycitations
- 2017A Testing Methodology for Performance-Based Specificationcitations
- 2017Frequency- and Time- Domain Dependency of Electrical Properties of Cement-Based Materials During Early Hydrationcitations
- 2016Monitoring micro-crack healing in an engineered cementitious composite using the environmental scanning electron microscopecitations
- 2016Chloride ingress into marine exposed concrete: A comparison of empirical- and physically- based modelscitations
- 2016Electrochemical immittance spectroscopy applied to a hybrid PVA/steel fiber engineered cementitious compositecitations
- 2015Two-point concrete resistivity measurementscitations
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document
Frequency- and Time- Domain Dependency of Electrical Properties of Cement-Based Materials During Early Hydration
Abstract
The electrical properties of Portland cement, and cements containing supplementary cementitious materials (SCM), were obtained over the frequency range 1kHz-10MHz during the initial 24-hours after gauging with water. The response was measured in terms of conductivity and permittivity with both parameters exhibiting significant temporal changes during this period. It was also evident that whilst the conductivity increased only marginally with increasing frequency of applied electrical field, the permittivity decreased by several orders of magnitude over this frequency range. Moreover, certain features of the permittivity response – which are related to bulk polarization processes – only revealed themselves in the higher frequency range (100kHz-1MHz), and went undetected at lower frequencies. The detailed frequency- and time- domain measurements allowed identification of several stages in the early hydration of cement-based materials and the response can be interpreted in terms of hydration kinetics, physico-chemical processes and microstructural development. It is shown that the methodology can be equally applied to cement-pastes and concretes.