F. Abdulsamad

Centre National de la Recherche Scientifique

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

A. Revil

Université Savoie Mont Blanc

Antoine Coperey

Université Gustave Eiffel

Ahmad Ghorbani

Institut National de l'Énergie Solaire

Noémie Prime

Laboratoire Optimisation de la Conception et Ingénierie de l'Environnement

Olivier Plé

Laboratoire Optimisation de la Conception et Ingénierie de l'Environnement

A. Soueid Ahmed

Centre National de la Recherche Scientifique

Nicolás Florsch

Sorbonne Université

Christian Camerlynck

Sorbonne Université

Laurent Peyras

Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement

Youzheng Qi

Lawrence Berkeley National Laboratory

Cooperative Institutions

Centre National de la Recherche Scientifique

Université Savoie Mont Blanc

Université Grenoble Alpes

Institut des Sciences de la Terre

Institut de Recherche pour le Développement

Université Gustave Eiffel

Territoires

Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement

Laboratoire Optimisation de la Conception et Ingénierie de l'Environnement

Institut National de l'Énergie Solaire

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Complex conductivity of rammed earth

Engineering Geology (2020)

F. Abdulsamad A. Revil Noémie Prime P.Y. Gnonnoue Myriam Schmutz

Rammed Earth

Void ratio

10.1016/j.enggeo.2020.105697

Cite

Citations (11)

Induced polarization response of porous media with metallic particles — Part 8: Influence of temperature and salinity

Geophysics (2018)

A. Revil Antoine Coperey Deqiang Mao F. Abdulsamad Ahmad Ghorbani

We have investigated the influence of temperature and salinity upon the spectral induced polarization of 10 samples including rocks with their mineralization (galena, chalcopyrite) plus sand mixed with semiconductors such as magnetite grains, graphite, and pyrite cubes of two different sizes. Measurements are made in a temperature-controlled bath with a high-precision impedance meter and using NaCl solutions. We cover the temperature range 5°C−50°C and the frequency range [Formula: see text] to 45 kHz. For one large pyrite cube, we also investigated six salinities from 0.1 to [Formula: see text] (at 25°C, NaCl) and three salinities for graphite. The spectra are fitted with a Cole-Cole complex parametric conductivity model for which we provide a physical meaning to the four Cole-Cole parameters. As expected, the Cole-Cole exponent and the chargeability are independent of the temperature and salinity. The instantaneous and steady state (direct current [DC]) conductivities depend on the salinity and temperature. This temperature dependence can be fitted with an Arrhenius law (combining the Stokes-Einstein and Vogel-Fulcher-Tammann equations) with an activation energy in the range of [Formula: see text]. This activation energy is the same as for the bulk pore-water conductivity demonstrating the control by the background electrolyte of these quantities, as expected. The instantaneous and DC conductivities depend on the salinity in a predictable way. The Cole-Cole relaxation time decreases with the temperature and decreases with the salinity. This behavior can be modeled with an Arrhenius law with an apparent activation energy of [Formula: see text]. A finite-element model is used further to analyze the mechanisms of polarization, and it can reproduce the temperature and salinity dependencies observed in the laboratory.

Atmospheric temperature range

10.1190/geo2018-0089.1

Cite

Citations (39)

Application of the Mise-à-la-Masse method to detect the bottom leakage of water reservoirs

Engineering Geology (2019)

Ling Chen A. Revil Youzheng Qi F. Abdulsamad Penghui Shi

Leakage (economics)

Sink (geography)

10.1016/j.enggeo.2019.105272

Cite

Citations (15)

Induced polarization response of porous media with metallic particles — Part 7: Detection and quantification of buried slag heaps

Geophysics (2018)

Youzheng Qi A. Soueid Ahmed A. Revil Ahmad Ghorbani F. Abdulsamad

With the progress of metallurgical activities, more and more dumped slag heaps emerge as valuable deposits to feed the growing need for metal resources. Detecting, quantifying, and reextracting metals from these slags may complement the prospection of new ore deposits. However, the spatial delineation of the slag heap cannot easily be obtained from the resistivity distribution alone (determined either with galvanometric or with induction-based methods). Although the magnetic method can detect slag heaps, it fails to make an estimation of the quantity of metal present in the slag. Alternatively, the induced polarization (IP) method can be used to fulfill this goal. The complex conductivity responses of slag samples from a slag heap in France are obtained in the laboratory. These data are used to assess the grade of the slag, which is close to 8%. Then, a least-squares 3D IP inversion is used to get the subsurface chargeability distribution delimiting the slag heap in the ground. From the linear relationship determined between the chargeability and the volumetric metal content or the volumetric slag content, the metallic volume of the slag heaps can be directly determined. This approach is used at the site of Saint-Vincent sur L'Isle, Dordogne (France), where it allows characterizing the shape of a slag heap and quantifying the total cumulative metal content of the investigated area.

Slag (welding)

Induced polarization

Heap (data structure)

10.1190/geo2017-0760.1

Cite

Citations (30)

Imaging the water content of rammed earth materials with induced polarization

Engineering Geology (2023)

F. Abdulsamad Taini Chitimbo A. Revil Noémie Prime Olivier Plé

Rammed Earth

Reflectometry

Saturation (graph theory)

Shrinkage

10.1016/j.enggeo.2023.107182

Cite

Citations (5)

Chargeability of Porous Rocks With or Without Metallic Particles

Petrophysics – The SPWLA Journal of Formation Evaluation and Reservoir Description (2018)

A. Revil T. Tartrat F. Abdulsamad Ahmad Ghorbani Antoine Coperey

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not.The documents may come from teaching and research institutions in France or abroad, or from public or private research centers.L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

Publics

10.30632/pjv59v4-2018a8

Cite

Citations (4)

Induced polarization response of porous media with metallic particles — Part 10: Influence of desiccation

Geophysics (2019)

Timothé Tartrat A. Revil F. Abdulsamad Ahmad Ghorbani Damien Jougnot

Desiccation influences the complex conductivity of porous media with disseminated metallic particles. We expand the mechanistic model developed in the previous papers of this series to include the effect of saturation upon the complex conductivity of mixtures of mineral grains, pyrite, and pore water. During desiccation, the salt is assumed to be segregated in the liquid pore water; therefore, the conductivity of the pore water increases when saturation decreases. We have performed 14 experiments corresponding to 91 complex conductivity spectra. In these experiments, the saturation of the water phase is changed over time by desiccation. The resulting spectra are fitted by a double Cole-Cole model used as the fitting model. We also developed a mechanistic model in which the chargeability and the relaxation time of the low-frequency polarization are expected to change with saturation in a predictable way. We first characterized the properties of the background material made by an illitic clay material. We determine how the Cole-Cole parameters depend on saturation. The Cole-Cole exponent is essentially independent on saturation. When the chargeability of the mixture is dominated by the presence of pyrite, it becomes independent of the saturation but a small effect on the chargeability is observed at low pyrite contents. The instantaneous conductivity of the background decreases with the saturation in a predictable way. The relaxation time depends on the inverse of the instantaneous conductivity and therefore on saturation. This dependence is well-explained through numerical simulations made with the finite-element method. Finally, we analyze the complex conductivity spectra of two clay-rock core samples from the Callovo-Oxfordian formation in the Paris Basin (France). The spectra are shown as a function of their desiccation and explained thanks to the newly developed model.

Saturation (graph theory)

Induced polarization

10.1190/geo2019-0048.1

Cite

Citations (18)

Induced polarization tomography applied to the detection and the monitoring of leaks in embankments

Engineering Geology (2019)

F. Abdulsamad A. Revil A. Soueid Ahmed Antoine Coperey M. Karaoulis

Leakage (economics)

Petrophysics

Electrical Resistivity Tomography

Induced polarization

10.1016/j.enggeo.2019.04.001

Cite

Citations (48)

La polarisation provoquée, outil géophysique de spatialisation des amas de scories pour l’estimation des productions sidérurgiques

ArchéoSciences (2017)

Nicolás Florsch F. Abdulsamad Jérémy Bonnenfant Christian Camerlynck

Estimer l’ampleur d’une ancienne exploitation minière profite à l’historien dans sa recherche de quantification des richesses issues des matières premières. S’agissant du fer, c’est aussi du pouvoir militaire dont il peut s’agir. Mais en l’absence d’archives préservées, il faut en passer par l’archéologie car alors seuls les vestiges du terrain permettent une estimation de la production de métal. Les méthodes géophysiques, prises comme outils de cartographie des amas de scories, peuvent contribuer à la compréhension d’un site métallurgique. Toutefois, les méthodes classiques, magnétiques, électriques et électromagnétiques ne sont pas des proxys directs des volumes de scories abandonnées. Elles ne fournissent pas une réponse spécifique et ne sont pas conservatrices (la réponse intégrale n’est pas proportionnelle à l’intégrale des masses ou volumes). Par contre, la méthode de Polarisation Provoquée (PP), d’ailleurs traditionnelle pour la recherche minière depuis le milieu du xxe siècle, offre, pour les amas de scories, une réponse spécifique, linéaire, conservative. Nous l’utilisons au lieu-dit « Grand Bois », sur la commune de Saint-Vincent-sur-l’Isle (Dordogne, France), pour un site d’extraction actif du xie au xve siècle. La PP nous permet de caractériser la géométrie de l’amas de scories et par suite rend possible l’estimation du volume de fer produit sur la plateforme métallurgique majeure du site étudié.

10.4000/archeosciences.4958

Cite

Citations (9)

Induced polarization response of porous media with metallic particles — Part 9: Influence of permafrost

Geophysics (2019)

A. Revil Mridul Razdan Stéphane Julien Antoine Coperey F. Abdulsamad

We consider a mixture made of dispersed metallic particles immersed into a background material saturated by an electrolyte. Below the freezing temperature (typically 0°C to [Formula: see text]), a fraction of the liquid water in the pore space is transformed into ice, whereas the salt remains segregated into the liquid-pore water solution. Our goal is to understand how freezing affects the complex conductivity (induced polarization) of such mixtures. Complex conductivity measurements (96 spectra) are performed in a temperature-controlled bath equipped with a high-precision impedance meter. We cover the temperature range from [Formula: see text] to [Formula: see text] to [Formula: see text] and the frequency range from [Formula: see text] to 45 kHz. The spectra are fitted with a double Cole-Cole complex conductivity model. A finite-element model is used to further analyze the mechanisms of polarization by considering an intragrain polarization mechanism for the metallic particles and a change of the conductivity of the background material modeled with an exponential freezing curve. This curve is used to relate the liquid water content to the temperature. In the context of freezing, we test all the aspects of the intragrain polarization model developed in the previous papers of this series, at least for a weakly polarizable background material. The Cole-Cole exponent and the chargeability are observed to be essentially independent of temperature including in freezing conditions. This means that all the relaxation times of the system follow the same temperature dependence and that the chargeability is controlled by the volume fraction of metal. The instantaneous conductivity (high-frequency conductivity) and the relaxation times depend on the temperature in a predictable way, and their product can be considered to be essentially temperature independent. The analytical and numerical models can reproduce the inverse relationship between the relaxation time and the instantaneous conductivity.

Volume fraction

10.1190/geo2019-0013.1

Cite

Citations (26)