A5034606242- Geological and Geochemical Analysis
- Geochemistry and Geologic Mapping
- Hydrocarbon exploration and reservoir analysis
- earthquake and tectonic studies
- CO2 Sequestration and Geologic Interactions
- Groundwater flow and contamination studies
- Radioactive element chemistry and processing
- Concrete and Cement Materials Research
- Geological and Geophysical Studies Worldwide
- Clay minerals and soil interactions
- Methane Hydrates and Related Phenomena
- Groundwater and Isotope Geochemistry
- Geology and Paleoclimatology Research
- Mine drainage and remediation techniques
- Metal Extraction and Bioleaching
- Geochemistry and Elemental Analysis
- Soil and Unsaturated Flow
- Paleontology and Stratigraphy of Fossils
- Geological formations and processes
- Geological Modeling and Analysis
- Heavy metals in environment
- Building materials and conservation
- Grouting, Rheology, and Soil Mechanics
- Geophysical and Geoelectrical Methods
- Mineralogy and Gemology Studies
Bureau de Recherches Géologiques et Minières
2016-2025
Université d'Orléans
2005-2024
Centre National de la Recherche Scientifique
2001-2021
Ecole Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)
2021
Université de Strasbourg
2021
Institut Fresnel
1999
The Cement–Opalinus Clay Interaction (CI) Experiment at the Mont Terri rock laboratory is a long-term passive diffusion–reaction experiment between contrasting materials of relevance to engineered barrier systems/near-field for deep disposal radioactive waste in claystone (Opalinus Clay). Reaction zones interfaces Opalinus with two different types concrete (OPC and "low-pH"/ESDRED) were examined by sampling after 2.2 4.9 years. Analytical methods included element mapping (SEM, EPMA), select...
A five-year-old interface between a Low Alkali Concrete (LAC) formulation (CEM III/B containing 66% slag and 10% nano-silica) Opalinus Clay (OPA) from field experiment at Mont Terri Underground Rock Laboratory in Switzerland (Jenni et al., 2014) has been studied to decipher the textural, mineralogical chemical changes that occurred two reacting materials. Reactivity LAC concrete OPA is found be limited ∼1 mm thick highly porous (ca. 75% porosity) white crust developed on side. Quantitative...
Opalinus Clay is chosen as host rock for the deep geological disposal of nuclear waste in Switzerland and also being considered Germany. The underlying Staffelegg Formation comprises potentially water-bearing layers. To investigate hydrogeological setting these two formations at Swiss Rock Laboratory Mont Terri bore holes have been drilled framework HS-Experiment (Hydrogeological Survey). 58 m long BHS-1 starts Lower Shaly facies Clay, crossects entire formation ends Triassic Klettgau...
Abstract The long‐term behavior of high‐level radioactive waste glass depends on the mineralogical and geochemical interactions between various components multibarrier system, under geological repository conditions. present study focuses SON68 alteration in synthetic cement water at 50°C 70°C. While pH > 10, dissolution rates were lower when contacting than deionized water. This effect stems from high Ca concentration presence Si porewater. initial low reaction progress (3.4 ± 1.0 × 10 −2...
Abstract The two‐phase flow characterization (CO 2 /water) of a Triassic sandstone core from the Paris Basin, France, is reported in this paper. Absolute properties (porosity and water permeability), capillary pressure, relative permeability with hysteresis between drainage imbibition, residual trapping capacities have been assessed at 9 MPa pore pressure 28°C liquid state) using single core‐flooding apparatus associated magnetic resonance imaging. Different methodologies followed to obtain...
We have studied the effect of wavelength change on picosecond acoustic pulses generated using a femtosecond laser. For first time, we show that pulse shape can be strongly influenced by laser wavelength. The results are in excellent agreement with calculation based thermoelastic model which connects them to significant changes piezo-optical constants. There similarities between present study and stress modulation spectroscopy, allows us ascribe observations interband transitions suggests...
<i>In-situ</i> sampling was performed in the Andra Meuse/Haute Marne (France) Underground Research Laboratory (URL) allowing study of two cement based materials/claystone interfaces that have undergone 4 to 5 years interaction. The first interface concerned a shotcrete sprayed on wall an access drift at laboratory level and second one, class G paste injected borehole filled from surface intercepted during excavation new gallery. In case, hydrodynamic conditions were controlled by ventilation...
Abstract Calcium silicate hydrate (C-S-H) alteration was studied with flow-through experiments at 25°C and pH 9.2. Three materials apparent Ca/Si ratios (C/S ratios) of 1.47, 1.38 0.86 were investigated. Physical (thermogravimetric analyses/differential thermal analysis), mineralogical (X-ray diffraction) chemical (electron probe microanalysis, transmission electron microscopy/energy dispersive X-ray spectrometry) analyses performed to characterize the reacting minerals. Initial...