Dépouillements

Modelling the spatial variability of leaching kinetics parameters / Thomas de Larrard in European journal of environmental and civil engineering, Vol. 15 N° 5 (Mai 2011) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 15 N° 5 (Mai 2011) . - pp. 675-698 Titre : Modelling the spatial variability of leaching kinetics parameters : Investigation about the input variability influence on the lifespan distribution of a concrete structure Type de document : texte imprimé Auteurs : Thomas de Larrard, Auteur Année de publication : 2011 Article en page(s) : pp. 675-698 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Durability  Variability  Leaching  Finite  volumes  method  Diffusion  Tortuosity  Identification  Artificial  neural  network  Correlation  length  Karhunen-Loève  expansion  Monte-Carlo  method Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This works aims at studying, through the Monte-Carlo method, the influence of the leaching kinetics parameters spatial variability on the lifespan of a concrete structure. The considered structure is a tunnel for nuclear waste disposal. It is observed that the expected value for the lifespan estimated when considering the material spatial variability is significantly lower than the lifespan estimated with a single simulation considering uniform parameters fields, equal to the expected value for each parameter. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16141 [article] Modelling the spatial variability of leaching kinetics parameters : Investigation about the input variability influence on the lifespan distribution of a concrete structure [texte imprimé] / Thomas de Larrard, Auteur . - 2011 . - pp. 675-698. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 15 N° 5 (Mai 2011) . - pp. 675-698 Mots-clés : Durability  Variability  Leaching  Finite  volumes  method  Diffusion  Tortuosity  Identification  Artificial  neural  network  Correlation  length  Karhunen-Loève  expansion  Monte-Carlo  method Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This works aims at studying, through the Monte-Carlo method, the influence of the leaching kinetics parameters spatial variability on the lifespan of a concrete structure. The considered structure is a tunnel for nuclear waste disposal. It is observed that the expected value for the lifespan estimated when considering the material spatial variability is significantly lower than the lifespan estimated with a single simulation considering uniform parameters fields, equal to the expected value for each parameter. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16141

Pore structure of mortar / Nicolas Bur in European journal of environmental and civil engineering, Vol. 15 N° 5 (Mai 2011) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 15 N° 5 (Mai 2011) . - pp. 699-714 Titre : Pore structure of mortar : Influence of cement base and curing Type de document : texte imprimé Auteurs : Nicolas Bur, Auteur ; Sébastien Roux, Auteur ; Yves Géraud, Auteur Année de publication : 2011 Article en page(s) : pp. 699-714 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Blast-furnace  slag  Porosity  Durability  Curing  Thermal  conductivity Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Because of considerations related to sustainable development issues, namely the decreasing of carbon dioxide emissions, the use of CEM III cement to replace CEM I is to be developed. This study shows the influence of curing and of cement types on the porous structure of mortars made up of CEM III A and C compared with CEM I and highlights a skin phenomenon having an effect on water transfer properties. The adaptation of different methods traditionally used in petrophysics and the use of an original approach based on scanned thermal conductivity measures have helped to characterise the porous network involved and its evolution. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16142 [article] Pore structure of mortar : Influence of cement base and curing [texte imprimé] / Nicolas Bur, Auteur ; Sébastien Roux, Auteur ; Yves Géraud, Auteur . - 2011 . - pp. 699-714. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 15 N° 5 (Mai 2011) . - pp. 699-714 Mots-clés : Blast-furnace  slag  Porosity  Durability  Curing  Thermal  conductivity Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Because of considerations related to sustainable development issues, namely the decreasing of carbon dioxide emissions, the use of CEM III cement to replace CEM I is to be developed. This study shows the influence of curing and of cement types on the porous structure of mortars made up of CEM III A and C compared with CEM I and highlights a skin phenomenon having an effect on water transfer properties. The adaptation of different methods traditionally used in petrophysics and the use of an original approach based on scanned thermal conductivity measures have helped to characterise the porous network involved and its evolution. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16142

Heat exposure tests on various types of fibre mortar / Mohammed Ezziane in European journal of environmental and civil engineering, Vol. 15 N° 5 (Mai 2011) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 15 N° 5 (Mai 2011) . - pp. 715-726 Titre : Heat exposure tests on various types of fibre mortar Type de document : texte imprimé Auteurs : Mohammed Ezziane, Auteur ; Laurent Molez, Auteur ; Raoul Jauberthie, Auteur Année de publication : 2011 Article en page(s) : pp. 715-726 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Fibre  reinforced  mortar  Steel  fibres  PP  fibres  Mechanical  behaviour  Fire  resistance Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : The advantage of steel fibres in cement based materials vis-à -vis mechanical reinforcement is widely recognized in the field of construction. This paper considers the behaviour of materials under extreme conditions in terms of temperature (e.g. fire). To this end, a comparison is made of the mechanical behaviour of mortars reinforced with steel fibres, polypropylene fibres and a hybrid fibre combination. These mortars are subjected to various heat exposures and then tested mechanically. Protection mechanisms of steel fibres and polypropylene are analyzed. SEM observations of steel fibres show oxidation at high temperatures; this oxidation impairs the protective effect of steel fibres. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16143 [article] Heat exposure tests on various types of fibre mortar [texte imprimé] / Mohammed Ezziane, Auteur ; Laurent Molez, Auteur ; Raoul Jauberthie, Auteur . - 2011 . - pp. 715-726. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 15 N° 5 (Mai 2011) . - pp. 715-726 Mots-clés : Fibre  reinforced  mortar  Steel  fibres  PP  fibres  Mechanical  behaviour  Fire  resistance Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : The advantage of steel fibres in cement based materials vis-à -vis mechanical reinforcement is widely recognized in the field of construction. This paper considers the behaviour of materials under extreme conditions in terms of temperature (e.g. fire). To this end, a comparison is made of the mechanical behaviour of mortars reinforced with steel fibres, polypropylene fibres and a hybrid fibre combination. These mortars are subjected to various heat exposures and then tested mechanically. Protection mechanisms of steel fibres and polypropylene are analyzed. SEM observations of steel fibres show oxidation at high temperatures; this oxidation impairs the protective effect of steel fibres. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16143

Modelling anisotropic damage and permeability of mortar under dynamic loads / Chen, Wen in European journal of environmental and civil engineering, Vol. 15 N° 5 (Mai 2011) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 15 N° 5 (Mai 2011) . - pp. 727-742 Titre : Modelling anisotropic damage and permeability of mortar under dynamic loads Type de document : texte imprimé Auteurs : Chen, Wen, Auteur ; Olivier Maurel, Auteur ; Thierry Reess, Auteur Année de publication : 2011 Article en page(s) : pp. 727-742 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Microstructure  Permeability  Damage  Cracking  Mortar Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper deals with the development of a model for concrete subjected to dynamic loads. Shock waves are generated by Pulsed Arc Electro-hydraulic Discharges (PAED) in water and applied to mortar samples. A diphasic model (liquid water and vapour) is implemented in order to describe the electrical discharge and the propagation of shock waves in water. An anisotropic damage model is devised, which takes account of the strain rate effect and the crack closure effect. Coupling between anisotropic damage and permeability is proposed in order to assess the variation of material permeability due to shock waves. Comparisons with experiments show a good correlation between the experimental and the numerical results. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16144 [article] Modelling anisotropic damage and permeability of mortar under dynamic loads [texte imprimé] / Chen, Wen, Auteur ; Olivier Maurel, Auteur ; Thierry Reess, Auteur . - 2011 . - pp. 727-742. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 15 N° 5 (Mai 2011) . - pp. 727-742 Mots-clés : Microstructure  Permeability  Damage  Cracking  Mortar Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper deals with the development of a model for concrete subjected to dynamic loads. Shock waves are generated by Pulsed Arc Electro-hydraulic Discharges (PAED) in water and applied to mortar samples. A diphasic model (liquid water and vapour) is implemented in order to describe the electrical discharge and the propagation of shock waves in water. An anisotropic damage model is devised, which takes account of the strain rate effect and the crack closure effect. Coupling between anisotropic damage and permeability is proposed in order to assess the variation of material permeability due to shock waves. Comparisons with experiments show a good correlation between the experimental and the numerical results. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16144

Multiple axle loadings / Farah Homsi in European journal of environmental and civil engineering, Vol. 15 N° 5 (Mai 2011) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 15 N° 5 (Mai 2011) . - pp. 743-758 Titre : Multiple axle loadings : Shape parameters and their effect on the fatigue life of asphalt mixtures Type de document : texte imprimé Auteurs : Farah Homsi, Auteur ; Bodin, Didier, Auteur ; Sylvie Yotte, Auteur Année de publication : 2011 Article en page(s) : pp. 743-758 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Asphalt  pavements  Fatigue  Multiple  axle  loadings  Multivariate  analysis Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : The effect of multiple axle loads on the fatigue life of asphalt pavements is a key issue dealing with the effect of heavy trucks on pavement distresses. Equivalent Single Axle loads are currently calculated with simplified hypotheses. This is an important stake for the ecological transportation: increasing the load per truck results in decreasing the emission of toxic gases per ton of transported goods. To study the effect of multiple axles, real displacement signals in the pavement are needed. The LCPC's accelerated testing facility (Nantes, France) enables the measurement of real loading signals in an experimental pavement. Parameters describing the pavement strain curves were computed for this database. A factorial analysis gives four independent parameters that define an experimental plan of a campaign of fatigue tests whose aim is to identify how the fatigue life is affected by the shape parameters. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16145 [article] Multiple axle loadings : Shape parameters and their effect on the fatigue life of asphalt mixtures [texte imprimé] / Farah Homsi, Auteur ; Bodin, Didier, Auteur ; Sylvie Yotte, Auteur . - 2011 . - pp. 743-758. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 15 N° 5 (Mai 2011) . - pp. 743-758 Mots-clés : Asphalt  pavements  Fatigue  Multiple  axle  loadings  Multivariate  analysis Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : The effect of multiple axle loads on the fatigue life of asphalt pavements is a key issue dealing with the effect of heavy trucks on pavement distresses. Equivalent Single Axle loads are currently calculated with simplified hypotheses. This is an important stake for the ecological transportation: increasing the load per truck results in decreasing the emission of toxic gases per ton of transported goods. To study the effect of multiple axles, real displacement signals in the pavement are needed. The LCPC's accelerated testing facility (Nantes, France) enables the measurement of real loading signals in an experimental pavement. Parameters describing the pavement strain curves were computed for this database. A factorial analysis gives four independent parameters that define an experimental plan of a campaign of fatigue tests whose aim is to identify how the fatigue life is affected by the shape parameters. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16145

Characterisation of geometrical properties of concrete using passive infrared thermography / Mathilde Larget in European journal of environmental and civil engineering, Vol. 15 N° 5 (Mai 2011) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 15 N° 5 (Mai 2011) . - pp. 759-772 Titre : Characterisation of geometrical properties of concrete using passive infrared thermography Type de document : texte imprimé Auteurs : Mathilde Larget, Auteur ; Denys Breysse, Auteur ; colette Sirieix, Auteur Année de publication : 2011 Article en page(s) : pp. 759-772 Note générale : Génie Civil Langues : Français (fre) Mots-clés : Infrared  thermography  Modelling  Fourier’s  equation  Concrete  Non-destructive  testing Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper talks about thermal response of concrete during natural warming up. An experimental study is carried out. Experimental warming up curves are compared with numerical modelling based of the Fourier equation. In the last part we study the influence of density, specific heat and thermal conductivity on diffusivity coefficient. Study proves that infrared passive thermography performed to monitor the natural warming up of concrete is sensitive to variable thickness of concrete. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16146 [article] Characterisation of geometrical properties of concrete using passive infrared thermography [texte imprimé] / Mathilde Larget, Auteur ; Denys Breysse, Auteur ; colette Sirieix, Auteur . - 2011 . - pp. 759-772. Génie Civil Langues : Français (fre) in European journal of environmental and civil engineering > Vol. 15 N° 5 (Mai 2011) . - pp. 759-772 Mots-clés : Infrared  thermography  Modelling  Fourier’s  equation  Concrete  Non-destructive  testing Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper talks about thermal response of concrete during natural warming up. An experimental study is carried out. Experimental warming up curves are compared with numerical modelling based of the Fourier equation. In the last part we study the influence of density, specific heat and thermal conductivity on diffusivity coefficient. Study proves that infrared passive thermography performed to monitor the natural warming up of concrete is sensitive to variable thickness of concrete. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16146

Mechanical behavior of timber-concrete slabs under real environmental conditions by experimental and numerical approaches / Eric Fournely in European journal of environmental and civil engineering, Vol. 15 N° 5 (Mai 2011) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 15 N° 5 (Mai 2011) . - pp. 773-786 Titre : Mechanical behavior of timber-concrete slabs under real environmental conditions by experimental and numerical approaches Type de document : texte imprimé Auteurs : Eric Fournely, Auteur ; Sebastian Fuentes, Auteur ; Mustapha Taazount, Auteur Année de publication : 2011 Article en page(s) : pp. 773-786 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Composite  slab  Timber-concrete  connection  Real  climatic  conditions  Experimentation  Modeling Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Experimentations on composite slabs have been carried out during 1 250 days in order to exhibit the behavior of timber-concrete structures in outdoor climatic conditions leading to high moisture content. Successive bending loadings are applied during this test; deflection and slip modulus of joints are studied. Real climatic conditions and moisture contents are recorded. Numerical modeling using FEM (Cast3m) is performed; results show the mechanical influence of the semi-rigidity of connections and the evolution of wood physical and mechanical characteristics during the experimentation. Numerical and experimental results are compared and present a good accuracy. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16147 [article] Mechanical behavior of timber-concrete slabs under real environmental conditions by experimental and numerical approaches [texte imprimé] / Eric Fournely, Auteur ; Sebastian Fuentes, Auteur ; Mustapha Taazount, Auteur . - 2011 . - pp. 773-786. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 15 N° 5 (Mai 2011) . - pp. 773-786 Mots-clés : Composite  slab  Timber-concrete  connection  Real  climatic  conditions  Experimentation  Modeling Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Experimentations on composite slabs have been carried out during 1 250 days in order to exhibit the behavior of timber-concrete structures in outdoor climatic conditions leading to high moisture content. Successive bending loadings are applied during this test; deflection and slip modulus of joints are studied. Real climatic conditions and moisture contents are recorded. Numerical modeling using FEM (Cast3m) is performed; results show the mechanical influence of the semi-rigidity of connections and the evolution of wood physical and mechanical characteristics during the experimentation. Numerical and experimental results are compared and present a good accuracy. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16147

Behaviour of slag cement concrete under restraint conditions / Aveline Darquennes in European journal of environmental and civil engineering, Vol. 15 N° 5 (Mai 2011) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 15 N° 5 (Mai 2011) . - pp. 787-798 Titre : Behaviour of slag cement concrete under restraint conditions Type de document : texte imprimé Auteurs : Aveline Darquennes, Auteur ; Stéphanie Staquet, Auteur ; Bernard Espion, Auteur Année de publication : 2011 Article en page(s) : pp. 787-798 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Blended  cement  Cracking  Creep  Relaxation  TSTM Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Some constructions built with slag cement concrete exhibit cracking at early age due to restrained shrinkage. To determine the slag effect on cracking, this study focuses on the autogenous deformation evolution of concretes characterized by different percentages of slag (0 and 42% of the binder mass) under free and restraint conditions by means of the TSTM device (Temperature Stress Testing Machine). Despite the fast kinetics of its autogenous deformation, the cracking appears later for the slag cement concrete than for the Portland cement concrete. This behaviour is related to the swelling of its cementitious matrix at early age and its large capacity for relaxing the stresses. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16148 [article] Behaviour of slag cement concrete under restraint conditions [texte imprimé] / Aveline Darquennes, Auteur ; Stéphanie Staquet, Auteur ; Bernard Espion, Auteur . - 2011 . - pp. 787-798. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 15 N° 5 (Mai 2011) . - pp. 787-798 Mots-clés : Blended  cement  Cracking  Creep  Relaxation  TSTM Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Some constructions built with slag cement concrete exhibit cracking at early age due to restrained shrinkage. To determine the slag effect on cracking, this study focuses on the autogenous deformation evolution of concretes characterized by different percentages of slag (0 and 42% of the binder mass) under free and restraint conditions by means of the TSTM device (Temperature Stress Testing Machine). Despite the fast kinetics of its autogenous deformation, the cracking appears later for the slag cement concrete than for the Portland cement concrete. This behaviour is related to the swelling of its cementitious matrix at early age and its large capacity for relaxing the stresses. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16148

Suffusion tests on cohesionless granular matter / Yacine Sail in European journal of environmental and civil engineering, Vol. 15 N° 5 (Mai 2011) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 15 N° 5 (Mai 2011) . - pp. 799-817 Titre : Suffusion tests on cohesionless granular matter : Experimental study Type de document : texte imprimé Auteurs : Yacine Sail, Auteur ; Didier Marot, Auteur ; Lue Sibille, Auteur Année de publication : 2011 Article en page(s) : pp. 799-817 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Soil  erosion  Suffusion  Blowout  Cohesionless  soils  Water  flow  Strain Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Under internal flow, hydraulic earth structures (dikes, levees, or dams) can incur a migration of particles possibly inducing a modification of hydraulic and mechanic characteristics. With the objective to characterize this phenomenon named internal erosion and its consequences on mechanical behaviour of granular materials, a large oedopermeameter device has been developed. An axial load is applied on specimen together with a downward flow with a constant hydraulic gradient. During the testing time, the bench can measure the spatial change of density and interstitial pressure along the specimen. Axial deformation, injected flow and extracted mass are also measured during the testing time. Erosion of fine particles is characterised by an extraction (out of specimen) of these particles on downstream specimen part and also by a fine particles migration in the whole specimen. This suffusion induces a settlement and a localized increase of interstitial pressure. Afterwards a localized blowout appears and triggers large specimen deformations. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16149 [article] Suffusion tests on cohesionless granular matter : Experimental study [texte imprimé] / Yacine Sail, Auteur ; Didier Marot, Auteur ; Lue Sibille, Auteur . - 2011 . - pp. 799-817. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 15 N° 5 (Mai 2011) . - pp. 799-817 Mots-clés : Soil  erosion  Suffusion  Blowout  Cohesionless  soils  Water  flow  Strain Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Under internal flow, hydraulic earth structures (dikes, levees, or dams) can incur a migration of particles possibly inducing a modification of hydraulic and mechanic characteristics. With the objective to characterize this phenomenon named internal erosion and its consequences on mechanical behaviour of granular materials, a large oedopermeameter device has been developed. An axial load is applied on specimen together with a downward flow with a constant hydraulic gradient. During the testing time, the bench can measure the spatial change of density and interstitial pressure along the specimen. Axial deformation, injected flow and extracted mass are also measured during the testing time. Erosion of fine particles is characterised by an extraction (out of specimen) of these particles on downstream specimen part and also by a fine particles migration in the whole specimen. This suffusion induces a settlement and a localized increase of interstitial pressure. Afterwards a localized blowout appears and triggers large specimen deformations. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16149

Shrinkage and swelling of clay soil / Céline Andrieux in European journal of environmental and civil engineering, Vol. 15 N° 5 (Mai 2011) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 15 N° 5 (Mai 2011) . - pp. 819-838 Titre : Shrinkage and swelling of clay soil : Comparison between laboratory and in situ measurements Type de document : texte imprimé Auteurs : Céline Andrieux, Auteur ; Marie Chrétien, Auteur ; Alain Denis, Auteur Année de publication : 2011 Article en page(s) : pp. 819-838 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Clayed  soil  Shrinkage  and  swelling  Free  swelling  Linear  shrinkage  factor Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper presents the results of the shrinkage and swelling behavior of clay soils in a geological formation in the laboratory and in situ. Free swelling and drying tests on undisturbed samples, from an experimental site in the Gironde department (33) in France, have allowed theoretical displacements to be computed, starting from the free swelling parameter g (%) and the linear shrinkage factor Rl (-). The computed displacements are of the order of millimeters in swelling and centimeters in shrinkage, whereas on the experimental site, they are of the order of millimeters during an annual cycle. However, following a second year of in situ measurements, we observed a cumulative settlement effect of the order of one centimeter. By comparing the results obtained, we revealed the influence of various factors, such as lithological variabilities at different scales, and repetitive shrinkage-swelling cycles, on the behavior of clay soils. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16150 [article] Shrinkage and swelling of clay soil : Comparison between laboratory and in situ measurements [texte imprimé] / Céline Andrieux, Auteur ; Marie Chrétien, Auteur ; Alain Denis, Auteur . - 2011 . - pp. 819-838. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 15 N° 5 (Mai 2011) . - pp. 819-838 Mots-clés : Clayed  soil  Shrinkage  and  swelling  Free  swelling  Linear  shrinkage  factor Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper presents the results of the shrinkage and swelling behavior of clay soils in a geological formation in the laboratory and in situ. Free swelling and drying tests on undisturbed samples, from an experimental site in the Gironde department (33) in France, have allowed theoretical displacements to be computed, starting from the free swelling parameter g (%) and the linear shrinkage factor Rl (-). The computed displacements are of the order of millimeters in swelling and centimeters in shrinkage, whereas on the experimental site, they are of the order of millimeters during an annual cycle. However, following a second year of in situ measurements, we observed a cumulative settlement effect of the order of one centimeter. By comparing the results obtained, we revealed the influence of various factors, such as lithological variabilities at different scales, and repetitive shrinkage-swelling cycles, on the behavior of clay soils. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16150

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