Juan Jorge Muñoz - Academia.edu (original) (raw)
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Papers by Juan Jorge Muñoz
AIP Conference Proceedings, 2009
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Physical Review E, 2012
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Unsaturated Soils, 2010
ABSTRACT Tailing deposits are singular geotechnical structures, which are intended to last indefi... more ABSTRACT Tailing deposits are singular geotechnical structures, which are intended to last indefi¬nitely in time. One of the most important challenges in relation to such waste deposits is to predict their behaviour in the long term, e.g. several centuries. In this context, it seems useful to observe the behaviour of old abandoned tailings deposits. Since tailings are very fine grained materials, the unsaturated phe¬nomena play a significant role in the hydraulic and mechanical behaviour of the deposit. In this paper, some examples of old abandoned tailing deposits are examined, located in low precipitation regions. The in situ measured water content distributions show that, the degree of saturation remains relatively high, even though the low rain amounts and high evaporation rates. It is concluded that the evolution of water content should be taken into account in the deposit design process.
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Géotechnique, 2011
The paper presents a benchmarking study carried out within the ‘Mechanics of Unsaturated Soils fo... more The paper presents a benchmarking study carried out within the ‘Mechanics of Unsaturated Soils for Engineering' (MUSE) network aimed at comparing different techniques for measurement and control of suction. Techniques tested by the eight ‘Mechanics of Unsaturated Soils for Engineering' research teams include axis-translation (pressure plate and suction-controlled oedometer), high-capacity tensiometer and osmotic technique. The soil used in the exercise was a mixture of uniform sand, sodium bentonite (active clay) and kaolinite (non-active clay), which were all commercially available. Samples were prepared by one team and distributed to all other teams. They were normally consolidated from slurry under one-dimensional conditions (consolidometer) to a given vertical stress. The water retention characteristics of the initially saturated specimens were investigated along the main drying path. Specimens were de-saturated by applying suction through the liquid phase when using an ...
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Joumal of Rock Mechanics and Geotechnical Engineering, 2010
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Frontiers of Architecture and Civil Engineering in China, 2011
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Esta Tesis esta dirigida al analisis teorico y experimental de problemas acoplados Termo-Hidro Me... more Esta Tesis esta dirigida al analisis teorico y experimental de problemas acoplados Termo-Hidro Mecanico (THM) que se desarrollan en formaciones geologicas profundas destinadas al almacenamiento de residuos radiactivos de alta actividad. En las ultimas decadas, han sido estudiadas las formaciones arcillosas para ser utilizadas como barreras geologicas debido a su reducida conductividad hidraulica. La degradacion de las rocas arcillosas producida por efectos de temperatura y por efectos de variacion en el grado de saturacion, es un factor de fundamental importancia, que es actualmente investigado en ensayos in situ a gran escala, como asi tambien en ensayos de laboratorio. En esta tesis, la roca Opalinus Clay ha sido ampliamente caracterizada mediante ensayos de laboratorios. Desde un punto de vista macro-estructural se ha obtenido la curva de retencion de agua, conductividad hidraulica, resistencia y deformacion. El analisis micro-estructural esta enfocado a la caracterizacion minera...
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Engineering Geology - ENG GEOL, 2010
The soil water characteristic curve (SWCC), also known as soil water retention curve (SWRC), desc... more The soil water characteristic curve (SWCC), also known as soil water retention curve (SWRC), describes the relationship between water content and soil suction in unsaturated soils. Water content and suction affect the permeability, shear strength, volume change and deformability of unsaturated soils. This paper presents results of the laboratory determination of the SWCC for soil samples obtained from the riverbank of the Lower Roanoke River in North Carolina. Six different testing methods were used to establish the SWCC including the filter paper, dewpoint potentiameter, vapor equilibrium, pressure plate, Tempe cell and osmotic methods. It is concluded that each suction measurement technique provides different measurable ranges of suction values, and the combined results from the different tests provide continuous SWCCs. Three widely available models were also shown to adequately fit the experimental SWCC data, particularly for matric suction values under 1500kPa. These results wil...
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Bookmarks Related papers MentionsView impact
Joumal of Rock Mechanics and Geotechnical Engineering, 2010
Bookmarks Related papers MentionsView impact
AIP Conference Proceedings, 2009
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Physical Review E, 2012
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Unsaturated Soils, 2010
ABSTRACT Tailing deposits are singular geotechnical structures, which are intended to last indefi... more ABSTRACT Tailing deposits are singular geotechnical structures, which are intended to last indefi¬nitely in time. One of the most important challenges in relation to such waste deposits is to predict their behaviour in the long term, e.g. several centuries. In this context, it seems useful to observe the behaviour of old abandoned tailings deposits. Since tailings are very fine grained materials, the unsaturated phe¬nomena play a significant role in the hydraulic and mechanical behaviour of the deposit. In this paper, some examples of old abandoned tailing deposits are examined, located in low precipitation regions. The in situ measured water content distributions show that, the degree of saturation remains relatively high, even though the low rain amounts and high evaporation rates. It is concluded that the evolution of water content should be taken into account in the deposit design process.
Bookmarks Related papers MentionsView impact
Géotechnique, 2011
The paper presents a benchmarking study carried out within the ‘Mechanics of Unsaturated Soils fo... more The paper presents a benchmarking study carried out within the ‘Mechanics of Unsaturated Soils for Engineering' (MUSE) network aimed at comparing different techniques for measurement and control of suction. Techniques tested by the eight ‘Mechanics of Unsaturated Soils for Engineering' research teams include axis-translation (pressure plate and suction-controlled oedometer), high-capacity tensiometer and osmotic technique. The soil used in the exercise was a mixture of uniform sand, sodium bentonite (active clay) and kaolinite (non-active clay), which were all commercially available. Samples were prepared by one team and distributed to all other teams. They were normally consolidated from slurry under one-dimensional conditions (consolidometer) to a given vertical stress. The water retention characteristics of the initially saturated specimens were investigated along the main drying path. Specimens were de-saturated by applying suction through the liquid phase when using an ...
Bookmarks Related papers MentionsView impact
Joumal of Rock Mechanics and Geotechnical Engineering, 2010
Bookmarks Related papers MentionsView impact
Frontiers of Architecture and Civil Engineering in China, 2011
Bookmarks Related papers MentionsView impact
Esta Tesis esta dirigida al analisis teorico y experimental de problemas acoplados Termo-Hidro Me... more Esta Tesis esta dirigida al analisis teorico y experimental de problemas acoplados Termo-Hidro Mecanico (THM) que se desarrollan en formaciones geologicas profundas destinadas al almacenamiento de residuos radiactivos de alta actividad. En las ultimas decadas, han sido estudiadas las formaciones arcillosas para ser utilizadas como barreras geologicas debido a su reducida conductividad hidraulica. La degradacion de las rocas arcillosas producida por efectos de temperatura y por efectos de variacion en el grado de saturacion, es un factor de fundamental importancia, que es actualmente investigado en ensayos in situ a gran escala, como asi tambien en ensayos de laboratorio. En esta tesis, la roca Opalinus Clay ha sido ampliamente caracterizada mediante ensayos de laboratorios. Desde un punto de vista macro-estructural se ha obtenido la curva de retencion de agua, conductividad hidraulica, resistencia y deformacion. El analisis micro-estructural esta enfocado a la caracterizacion minera...
Bookmarks Related papers MentionsView impact
Engineering Geology - ENG GEOL, 2010
The soil water characteristic curve (SWCC), also known as soil water retention curve (SWRC), desc... more The soil water characteristic curve (SWCC), also known as soil water retention curve (SWRC), describes the relationship between water content and soil suction in unsaturated soils. Water content and suction affect the permeability, shear strength, volume change and deformability of unsaturated soils. This paper presents results of the laboratory determination of the SWCC for soil samples obtained from the riverbank of the Lower Roanoke River in North Carolina. Six different testing methods were used to establish the SWCC including the filter paper, dewpoint potentiameter, vapor equilibrium, pressure plate, Tempe cell and osmotic methods. It is concluded that each suction measurement technique provides different measurable ranges of suction values, and the combined results from the different tests provide continuous SWCCs. Three widely available models were also shown to adequately fit the experimental SWCC data, particularly for matric suction values under 1500kPa. These results wil...
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Joumal of Rock Mechanics and Geotechnical Engineering, 2010
Bookmarks Related papers MentionsView impact