Simultaneous monitoring of hydration kinetics, microstructural evolution, and surface interactions in hydrating gypsum plaster in the presence of additives

Song, Kyung-Min; Mitchell, Jonathan; Jaffel, Hamouda; Gladden, Lynn F.

doi:10.1007/s10853-010-4572-7

Cited by 42 publications

(34 citation statements)

References 39 publications

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“…The total experiment duration was 1.5 h, and included 32 repeat scans to accommodate the rf phase cycle and provide signal averaging to improve the signal‐to‐noise ratio (SNR) of the data. Elsewhere we have shown that T 1 – T 2 data may be acquired in 3 min 40…”

Section: Methodsmentioning

confidence: 96%

Interpretation of NMR Relaxation as a Tool for Characterising the Adsorption Strength of Liquids inside Porous Materials

D’Agostino

Mitchell

Mantle

et al. 2014

Chemistry A European J

116

147

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Nuclear magnetic resonance (NMR) relaxation times are shown to provide a unique probe of adsorbate–adsorbent interactions in liquid-saturated porous materials. A short theoretical analysis is presented, which shows that the ratio of the longitudinal to transverse relaxation times (T1/T2) is related to an adsorbate–adsorbent interaction energy, and we introduce a quantitative metric esurf (based on the relaxation time ratio) characterising the strength of this surface interaction. We then consider the interaction of water with a range of oxide surfaces (TiO2 anatase, TiO2 rutile, γ-Al2O3, SiO2, θ-Al2O3 and ZrO2) and show that esurf correlates with the strongest adsorption sites present, as determined by temperature programmed desorption (TPD). Thus we demonstrate that NMR relaxation measurements have a direct physical interpretation in terms of the characterisation of activation energy of desorption from the surface. Further, for a series of chemically similar solid materials, in this case a range of oxide materials, for which at least two calibration values are obtainable by TPD, the esurf parameter yields a direct estimate of the maximum activation energy of desorption from the surface. The results suggest that T1/T2 measurements may become a useful addition to the methods available to characterise liquid-phase adsorption in porous materials. The particular motivation for this work is to characterise adsorbate–surface interactions in liquid-phase catalysis.

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Section: Methodsmentioning

confidence: 96%

Interpretation of NMR Relaxation as a Tool for Characterising the Adsorption Strength of Liquids inside Porous Materials

D’Agostino

Mitchell

Mantle

et al. 2014

Chemistry A European J

116

147

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“…65 Two-dimensional T 1 -T 2 correlations were obtained using the saturation-recovery-CPMG sequence. 66,67 The T 1 recovery interval was varied logarithmically from τ 1 = 100 μs to 15 s over 32 separate acquisitions. The CPMG echo time was fixed at t e = 400 μs, with all other parameters equal to those given above.…”

Section: B Nmr Experimentsmentioning

confidence: 99%

“…67 The speed of this measurement makes it appropriate for routine application in core analysis, especially when the relaxation properties of a sample are required to define optimized sampling schemes for imaging or flow experiments. It is also possible to acquire spatially resolved T 1 -T 2 correlations which enable the measurement of a wettability profile.…”

Section: Pore Size Distributionsmentioning

confidence: 99%

Contributed Review: Nuclear magnetic resonance core analysis at 0.3 T

Mitchell

Fordham

2014

Review of Scientific Instruments

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Nuclear magnetic resonance (NMR) provides a powerful toolbox for petrophysical characterization of reservoir core plugs and fluids in the laboratory. Previously, there has been considerable focus on low field magnet technology for well log calibration. Now there is renewed interest in the study of reservoir samples using stronger magnets to complement these standard NMR measurements. Here, the capabilities of an imaging magnet with a field strength of 0.3 T (corresponding to 12.9 MHz for proton) are reviewed in the context of reservoir core analysis. Quantitative estimates of porosity (saturation) and pore size distributions are obtained under favorable conditions (e.g., in carbonates), with the added advantage of multidimensional imaging, detection of lower gyromagnetic ratio nuclei, and short probe recovery times that make the system suitable for shale studies. Intermediate field instruments provide quantitative porosity maps of rock plugs that cannot be obtained using high field medical scanners due to the field-dependent susceptibility contrast in the porous medium. Example data are presented that highlight the potential applications of an intermediate field imaging instrument as a complement to low field instruments in core analysis and for materials science studies in general.

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“…On the other hand 1 H NMR (Nuclear Magnetic Resonance) relaxometry provides the distribution of (NMR) relaxation times of hydrogen-bearing fluid molecules embedded in a sample volume that are known to depend on pore size, surface chemistry and saturation state. So far, this technique has mainly been used to study the pore characteristics of cement [21], plaster [22] or model porous systems [23][24] or more globally the structure evolution of cement or lime pastes [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

NMR observation of water transfer between a cement paste and a porous medium

Fourmentin

Faure

Rodts

et al. 2017

Cement and Concrete Research

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We show that it is possible to follow the liquid transfer between a cement paste and a porous medium in contact with it, by analyzing the evolution of the distribution of 1 H NMR relaxation times. This in particular makes it possible to see that whatever the initial water fraction in the paste, a porous medium with sufficiently small pores can rapidly extract a significant amount of water from this paste. Afterwards, during the hydration process, the cement paste progressively gets water back from this porous medium. The amount of water thus extracted by the paste finally appears to just compensate the volume loss due to water consumption by the hydration process.

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Simultaneous monitoring of hydration kinetics, microstructural evolution, and surface interactions in hydrating gypsum plaster in the presence of additives

Cited by 42 publications

References 39 publications

Interpretation of NMR Relaxation as a Tool for Characterising the Adsorption Strength of Liquids inside Porous Materials

Interpretation of NMR Relaxation as a Tool for Characterising the Adsorption Strength of Liquids inside Porous Materials

Contributed Review: Nuclear magnetic resonance core analysis at 0.3 T

NMR observation of water transfer between a cement paste and a porous medium

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