A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Dielectric permittivity of C-S-H
https://orcid.org/0000-0002-1494-2504
https://orcid.org/0000-0003-0281-4502
https://orcid.org/0000-0001-6084-094X
Abstract As a porous hydrophilic phase, C–S–H is expected to exhibit a frequency-dependent dielectric response. This C–S–H property remains unknown, despite the importance of dielectric assessment for non-destructive evaluation of concrete. This study adopts a multiscale approach to estimate the complex dielectric response of C–S–H over the 0 to 1000 GHz frequency range. We perform molecular dynamics simulations to compute the frequency-dependent dielectric response of water in C–S–H from the polarization correlation formula. We consider pore sizes covering the range associated with interlayer and gel pores in C–S–H. The dielectric response obtained is anisotropic and pore size dependent, as expected in layered materials. The results at the molecular scale are then used as inputs in a homogenization model to estimate the dielectric permittivity of C–S–H gel, which we compare with estimations obtained from inverse analysis based on experiments. Our results are a valuable input for multiscale modeling of non-destructive testing and evaluation in cement-based materials.
Dielectric permittivity of C-S-H
https://orcid.org/0000-0002-1494-2504
https://orcid.org/0000-0003-0281-4502
https://orcid.org/0000-0001-6084-094X
Abstract As a porous hydrophilic phase, C–S–H is expected to exhibit a frequency-dependent dielectric response. This C–S–H property remains unknown, despite the importance of dielectric assessment for non-destructive evaluation of concrete. This study adopts a multiscale approach to estimate the complex dielectric response of C–S–H over the 0 to 1000 GHz frequency range. We perform molecular dynamics simulations to compute the frequency-dependent dielectric response of water in C–S–H from the polarization correlation formula. We consider pore sizes covering the range associated with interlayer and gel pores in C–S–H. The dielectric response obtained is anisotropic and pore size dependent, as expected in layered materials. The results at the molecular scale are then used as inputs in a homogenization model to estimate the dielectric permittivity of C–S–H gel, which we compare with estimations obtained from inverse analysis based on experiments. Our results are a valuable input for multiscale modeling of non-destructive testing and evaluation in cement-based materials.
Dielectric permittivity of C-S-H
https://orcid.org/0000-0002-1494-2504
https://orcid.org/0000-0003-0281-4502
https://orcid.org/0000-0001-6084-094X
Abstract As a porous hydrophilic phase, C–S–H is expected to exhibit a frequency-dependent dielectric response. This C–S–H property remains unknown, despite the importance of dielectric assessment for non-destructive evaluation of concrete. This study adopts a multiscale approach to estimate the complex dielectric response of C–S–H over the 0 to 1000 GHz frequency range. We perform molecular dynamics simulations to compute the frequency-dependent dielectric response of water in C–S–H from the polarization correlation formula. We consider pore sizes covering the range associated with interlayer and gel pores in C–S–H. The dielectric response obtained is anisotropic and pore size dependent, as expected in layered materials. The results at the molecular scale are then used as inputs in a homogenization model to estimate the dielectric permittivity of C–S–H gel, which we compare with estimations obtained from inverse analysis based on experiments. Our results are a valuable input for multiscale modeling of non-destructive testing and evaluation in cement-based materials.
Dielectric permittivity of C-S-H
Ait Hamadouche, Sofiane (author) / Honorio, Tulio (author) / Bore, Thierry (author) / Benboudjema, Farid (author) / Daout, Franck (author) / Vourc’h, Eric (author)
2023-04-08
Article (Journal)
Electronic Resource
English
Method of fabricating high-permittivity dielectric material
| European Patent Office | 2022
Effective permittivity of layered dielectric sphere composites
| British Library Online Contents | 1998
Method of Fabricating High-Permittivity Dielectric Material
| European Patent Office | 2019
Identification of giant dielectric permittivity in the BiVO4
| British Library Online Contents | 2017
Field-dependent dielectric permittivity of paraelectric superlattice structures
| British Library Online Contents | 1998