| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Mccarter, Wj
Heriot-Watt University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (32/32 displayed)
- 2021The electro-mechanical tensile properties of an engineered cementitious compositecitations
- 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
- 2016Keynote Paper - Performance Monitoring for Sustainable Concrete Infrastructure
- 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
- 2015A durability performance-index for concrete: developments in a novel test methodcitations
- 2015Two-point concrete resistivity measurementscitations
- 2015A durability performance-index for concretecitations
- 2015Conductivity/activation energy relationships for cement-based materials undergoing cyclic thermal excursionscitations
- 2012Use of a multi-electrode sensor to monitor early age properties of concrete
- 2012Developments in performance-based testing of concrete
- 2012Developments in performance monitoring of concrete exposed to extreme environmentscitations
- 2011Impedance spectroscopy measurements to study physio-chemical processes in lime-based compositescitations
- 2009Complex impedance and dielectric dispersion in carbon fiber reinforced cement matricescitations
- 2008Rheology of carbon fibre reinforced cement-based mortarcitations
- 2008Performance of concrete in XS1, XS2 and XS3 environmentscitations
- 2006Rheology of low carbon fibre content reinforced cement mortarcitations
- 2002Monitoring electrical resistance of concretes containing alternative cementitious materials to assess their resistance to chloride penetrationcitations
- 2001Surface zone concretecitations
- 2000Diffusion kinetics in cementitious binderscitations
- 2000Electrical conductivity, diffusion, and permeability of Portland cement-based mortarscitations
Places of action
| Organizations | Location | People |
|---|
article
Assessing the performance and transport properties of concrete using electrical property measurements
Abstract
The electrical properties of porous systems are intimately linked to mass transport and flow processes such as diffusion and permeability and offer a simple testing methodology for assessing those properties which are responsible for the durability and long-term performance of construction materials. In the current study, electrical impedance spectra for concretes containing both plain and blended Portland cement binders were obtained over a period of 360 days. In-situ impedance measurements were used to accurately identify the bulk resistance (hence evaluation of resistivity) of the concretes and the optimum frequency range for bulk resistance measurements. The bulk resistivity was normalised by that of the pore-fluid resistivity obtained from computer simulations and the results indicated that the pore-fluid resistivity decreased only marginally with time once the hydration process had advanced beyond 28 days. It is shown that the normalised resistivity – termed the Formation Factor – displayed a continual increase with time, highlighting on-going hydration/pozzolanic reaction and pore structure refinement over the entire test period. This was particularly evident for the slag concretes. Using the normalisation process, a simple approach is presented to evaluate the effective diffusion coefficient of the concretes and a durability/performance classification system, based on the Formation Factor, is presented.