L. Pel
YOU?
Author Swipe
View article: Crystallization of NaCl–NaNO<sub>3</sub>–H<sub>2</sub>O in Porous Media During Drying
Crystallization of NaCl–NaNO<sub>3</sub>–H<sub>2</sub>O in Porous Media During Drying Open
In this study, we investigated the crystallization of a salt mixture during drying in a porous medium. Specifically, we focused on the ternary system of NaCl-NaNO3-H2O, which is also encountered in situ. In order to study the crystallizati…
View article: Determination of the surface relaxivity of soft sediment using particle size and shape
Determination of the surface relaxivity of soft sediment using particle size and shape Open
This study presents a method to determine surface relaxivity in soft sediments by combining one-dimensional Nuclear Magnetic Resonance (NMR) imaging with particle size and shape estimates. In order to determine the surface relaxivity up to…
View article: Brittleness indices for chemically corroded rocks under unloading confining pressure
Brittleness indices for chemically corroded rocks under unloading confining pressure Open
Rock brittleness constitutes a pivotal mechanical property for geotechnical engineering. In this paper, multi-scale investigations, involving Nuclear Magnetic Resonance (NMR), X-ray Diffraction (XRD), ion chromatography, Scanning Electron …
View article: Meso-damage characterization of chemically corroded rocks under unloading confinement conditions
Meso-damage characterization of chemically corroded rocks under unloading confinement conditions Open
Characterizing meso-damage and understanding its correlation with macroscopic mechanical responses of rocks under coupled chemical-mechanical (C-M) conditions are crucial for the stability analysis and safety design of underground construc…
View article: Fast 1D NMR imaging of clay sedimentation using a multi-slice stepper motor method
Fast 1D NMR imaging of clay sedimentation using a multi-slice stepper motor method Open
This study introduces a fast 1D nuclear magnetic resonance (NMR) imaging method based on multi-slice imaging with a stepper motor to study sedimentation dynamics of clayey soils. Traditional NMR is limited by long acquisition times due to …
View article: Non-Destructive Measurement of Chloride Profiles in Cementitious Materials Using NMR
Non-Destructive Measurement of Chloride Profiles in Cementitious Materials Using NMR Open
In order to measure non-destructively the 35Cl in cementitious materials a special NMR setup was developed. Besides 35Cl also quasi-simultaneously both 23Na and 1H can be measured. This setup is built around a 4.7 T wide bore superconducti…
View article: Stress-dependent instantaneous cohesion and friction angle for the Mohr–Coulomb criterion
Stress-dependent instantaneous cohesion and friction angle for the Mohr–Coulomb criterion Open
The strength criterion of rock is essential for stability control and safety design of geotechnical engineering constructions. Due to its widespread adoption, the Mohr–Coulomb (M-C) criterion is prominent among strength criteria. However, …
View article: Influence of water-soluble leachates from natural fibers on the hydration and microstructure of cement paste studied by nuclear magnetic resonance
Influence of water-soluble leachates from natural fibers on the hydration and microstructure of cement paste studied by nuclear magnetic resonance Open
This study aims to evaluate the influence of natural fiber leachates on cement pastes for advanced bio-composite production. Cement samples are made by mixing cement with leachates from oil palm and coir fibers at three concentrations. Thr…
View article: Stress-dependent Mohr–Coulomb shear strength parameters for intact rock
Stress-dependent Mohr–Coulomb shear strength parameters for intact rock Open
Rock strength is imperative for the design and stability analysis of engineering structures. The Mohr-Coulomb (M-C) criterion holds significant prominence in geotechnical engineering. However, the M-C criterion fails to accurately capture …
View article: Effect of evaporative surface area on salt efflorescence and subflorescence formation in a given porous material
Effect of evaporative surface area on salt efflorescence and subflorescence formation in a given porous material Open
Salt crystallization in composite layered porous materials such as wall paintings, frescoes, tiles, and ceramics can lead to cracks or delamination of the upper layers (paintings and glaze). The resulting open surface areas induce asymmetr…
View article: NMR investigations on Cl− and Na+ ion binding during the early hydration process of C3S, C3A and cement paste: A combined modelling and experimental study
NMR investigations on Cl− and Na+ ion binding during the early hydration process of C3S, C3A and cement paste: A combined modelling and experimental study Open
Using materials containing sodium chloride(e.g., seawater) to make concrete is sometimes unavoidable. However, the associated ion binding mechanisms and structural evolution during the early hydration process are not fully understood. This…
View article: Meso-damage quantification of rocks under coupled chemical-mechanical conditions
Meso-damage quantification of rocks under coupled chemical-mechanical conditions Open
Understanding rock damage evolution under coupled chemical–mechanical (C-M) conditions is crucial for analyzing the stability of underground constructions exposed to chemically corrosive environments. Incorporating multiscale experimental …
View article: Sol-gel transition by evaporation in porous media
Sol-gel transition by evaporation in porous media Open
International audience
View article: Sol-gel transition by evaporation in porous media
Sol-gel transition by evaporation in porous media Open
Historical monuments, outdoor stone sculptures and artworks made of porous materials are exposed to chemical and physical degradation over time. Presently, the most promising route for consolidation of weakened porous materials is the inje…
View article: Quantifying early age hydration and micro-structure evolution of fast setting binder using 1H NMR
Quantifying early age hydration and micro-structure evolution of fast setting binder using 1H NMR Open
The first hours’ hydration of fast-setting binder is difficult to monitor due to the limited temporal resolution of common micro-structure-chemistry probes and the complicated product compositions. This study explored using T2 relaxation t…
View article: A sequentially coupled chemical-mechanical damage constitutive model for carbonate rocks
A sequentially coupled chemical-mechanical damage constitutive model for carbonate rocks Open
Modelling the constitutive relations of chemically corroded carbonate rocks is important for the design and stability evaluation of engineering constructions in karst areas (e.g., mines, tunnels and dams, etc.) [1-4]. This paper presents a…
View article: Dewatering and consolidation of clay slurries
Dewatering and consolidation of clay slurries Open
Dewatering, which is the process of separating (colloidal) suspended particles from a solvent (usually water), is used in many engineering applications (sanitary engineering, dredging engineering…). Key questions associated with dewatering…
View article: H2-gas diffusion in porous media as observed by NMR
H2-gas diffusion in porous media as observed by NMR Open
Not only is hydrogen (H2) the simplest and most abundant gas in our universe, it also plays a pivotal role in the decarbonization of our energy. As such hydrogen will be one of the most important critical enablers for industry in the globa…
View article: A contribution to understanding the rheological measurement, yielding mechanism and structural evolution of fresh cemented paste backfill
A contribution to understanding the rheological measurement, yielding mechanism and structural evolution of fresh cemented paste backfill Open
Cemented paste backfill (CPB) is an efficient and sustainable technology for the disposal of tailings in mining industry. However, the flowability of CPB is not completely clear due to the lack of robust characterization methods and suffic…
View article: Modelling of T1 dispersion effects on fluid polarization in oil flow
Modelling of T1 dispersion effects on fluid polarization in oil flow Open
In this article we use numerical simulations to study the effect of T1 dispersion on fluid polarization buildup in oil flow to characterize the sensitivity of both a conventional NMR concept (ROI located inside the polarization magnet) and…
View article: Distribution and curing kinetics of waterborne epoxy resin in repair system: Characterization and quantification by 1H low-field NMR
Distribution and curing kinetics of waterborne epoxy resin in repair system: Characterization and quantification by 1H low-field NMR Open
Cement-based mortars are commonly modified with Waterborne Epoxy Resin (WER). However, the curing kinetics of WER in mortars has never been quantified up to now. This study proposed using 1H low-field nuclear magnetic resonance (1H LF-NMR)…
View article: An NMR study of the role of coir fibers in the hydration and drying of cement paste at early age
An NMR study of the role of coir fibers in the hydration and drying of cement paste at early age Open
Natural fibers such as coir fibers have been increasingly explored as reinforcement in the cementitious composite to promote sustainable and economical construction. However, the in-situ application of this composite presents challenges du…