Similarity properties of demineralization and degradation of cracked porous materials

Mainguy, M.; Ulm, Franz‐Josef; Heukamp, Franz H.

doi:10.1016/s0020-7683(00)00417-0

Cited by 24 publications

(9 citation statements)

References 27 publications

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“…This observation is also described in many publications on calcium leaching (see e.g. Le Bell e ego et al, 2000;Carde et al, 1996G e erard et al, 1998;Mainguy et al, , 2001Mainguy and Ulm, 2000;Torrenti et al, 1998). Compared to the dissolution front of CSH-phases ðX 2 ¼ 0:049 mm ffiffi 2000) for a cement paste with a high water to cement ratio.…”

Section: Propagation Of Dissolution Frontssupporting

confidence: 70%

Coupled chemo-mechanical deterioration of cementitious materials Part II: Numerical methods and simulations

Kuhl

Bangert

Meschke

2004

International Journal of Solids and Structures

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Section: Propagation Of Dissolution Frontssupporting

confidence: 70%

Coupled chemo-mechanical deterioration of cementitious materials Part II: Numerical methods and simulations

Kuhl

Bangert

Meschke

2004

International Journal of Solids and Structures

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“…Some geoscientists have reported incongruent dissolution in water-rock interactions (Guy & Schott 1989;Nesbitt et al 1991). Mass transport processes involving diffusion and advection also affect the enrichment and leaching of specific elements during weathering and hydrothermal alteration processes (Hutcheon et al 2000;Mainguy et al 2001). In our previous study (Hara & Tsuchiya 2005), incongruent dissolution was observed in a batch-type hydrothermal experiment at temperatures up to 150°C.…”

Section: Introductionmentioning

confidence: 90%

“…Mass transport processes involving diffusion and advection also affect the enrichment and leaching of specific elements during weathering and hydrothermal alteration processes (Hutcheon et al. 2000; Mainguy et al. 2001).…”

Section: Introductionmentioning

confidence: 99%

Chemical modification of pyroclastic rock by hot water: an experimental investigation of mass transport at the fluid–solid interface

Hara

Tsuchiya

2009

Geofluids

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Hydrothermal water-(pyroclastic) rock interactions were examined using flow-through experiments to deduce the effect of mass transport phenomena on the reaction process. A series of experiments were conducted over the temperature range 75-250°C, with a constant temperature for each experiment, and at saturated vapour pressure, to estimate the apparent rate constants as a function of temperature.Based on the chemistry of analysed solutions, the water-rock interaction in the experiments was controlled by diffusion from the reaction surface and by the existence of a surface layer at the rock-fluid interface, which regulated the chemical reaction rate. The reaction progress depended to a high degree on flow velocity and temperature conditions, with element abundances in the fluid significantly affected by these factors. Mass transport coefficients for diffusion from the rock surface to the bulk solution have been estimated. Ca is selectively depleted under lower temperature conditions (T < 150°C), whereas Na is greatly depleted under higher temperature conditions (T > 150°C), and K reaction rates are increased when flow velocity increases. Using these conditions, specific alkali and alkali earth cations were selectively leached from mineral surfaces. The 'surface layer' comprised a 0.5-1.8 mm boundary film on the solution side (the thickness of this layer has no dependence on chemical character) and a reaction layer. The reaction layer was composed of a Si, Al-rich cation-leached layer, whose thickness was dependent on temperature, flow velocity and reaction length. The reaction layer varied in thickness from about 10 )4 to 10 )7 mm under high temperature ⁄ low fluid velocity and low temperature ⁄ high fluid velocity conditions, respectively.

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“…They are successfully applied to calcium leaching (see e.g. Arroyo et al, 2000;Le Bell e ego et al, 2000Delagrave et al, 1997;D ı ıez et al, 2002;G e erard, 1996, 2000G e erard et al, 1998;Kuhl et al, 2000;Pijaudier-Cabot et al, 1998a,b, 2002Mainguy, 1999;Mainguy and Coussy, 2000;Mainguy et al, , 2001Mainguy and Ulm, 2000;Ulm et al, 2001). As far as numerical and algorithmic aspects are concerned, the main advantage of G e erardÕs model (1996) is the C 2 -continuity of the sðj c Þ-curve.…”

Section: Phenomenological Chemistrymentioning

confidence: 99%

Coupled chemo-mechanical deterioration of cementitious materials. Part I: Modeling

Kuhl

Bangert

Meschke

2004

International Journal of Solids and Structures

120

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Similarity properties of demineralization and degradation of cracked porous materials

Cited by 24 publications

References 27 publications

Coupled chemo-mechanical deterioration of cementitious materials Part II: Numerical methods and simulations

Coupled chemo-mechanical deterioration of cementitious materials Part II: Numerical methods and simulations

Chemical modification of pyroclastic rock by hot water: an experimental investigation of mass transport at the fluid–solid interface

Coupled chemo-mechanical deterioration of cementitious materials. Part I: Modeling

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