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Effective medium theories in electromagnetism for the prediction of water content in cement pastes
- Source :
- International Journal of Engineering Science, International Journal of Engineering Science, Elsevier, 2020, 150, pp.103273. ⟨10.1016/j.ijengsci.2020.103273⟩, International Journal of Engineering Science, 2020, 150, pp.103273. ⟨10.1016/j.ijengsci.2020.103273⟩
- Publication Year :
- 2020
- Publisher :
- HAL CCSD, 2020.
-
Abstract
- International audience; Permittivity is a widespread property used to estimate the water content in concrete. To improve the reverse conversion from permittivity measurements to moisture content, we suggest the building of an electromagnetic model of concrete. In this paper, such a model is developed for the case of cement pastes. It relies on electromagnetic homogenization schemes which require an information about the permittivity of the predominant species in the material. Estimating those properties over the frequency range [200 MHz; 1 GHz] was achieved by synthesizing model cementitious binders (C-S-H and portlandite mixtures), by characterizing their macroscopic permittivity with an open-ended coaxial probe and by identifying their intrinsic permittivity with a specific homogenization procedure combining effective medium equations. The identified values are used as inputs for a homogenization procedure estimating the water content in cement pastes. For a wide range of water content, the simulated and measured real parts of permittivity show a good agreement.
- Subjects :
- Permittivity
Materials science
02 engineering and technology
engineering.material
Homogenization (chemistry)
Portlandite
Coaxial probe
[SPI]Engineering Sciences [physics]
0203 mechanical engineering
Electromagnetism
Dielectric permittivity
Cementitious materials
General Materials Science
Composite material
Water content
Cement
Homogenization
Mechanical Engineering
General Engineering
021001 nanoscience & nanotechnology
[SPI.GCIV]Engineering Sciences [physics]/Civil Engineering
020303 mechanical engineering & transports
Mechanics of Materials
engineering
Cementitious
0210 nano-technology
Subjects
Details
- Language :
- English
- ISSN :
- 00207225
- Database :
- OpenAIRE
- Journal :
- International Journal of Engineering Science, International Journal of Engineering Science, Elsevier, 2020, 150, pp.103273. ⟨10.1016/j.ijengsci.2020.103273⟩, International Journal of Engineering Science, 2020, 150, pp.103273. ⟨10.1016/j.ijengsci.2020.103273⟩
- Accession number :
- edsair.doi.dedup.....5c3f7515ea3d98136ceb344775e71e61