Dépouillements

Study of the transfer of metallic elements through sand/bentonite layers / Fouad Ghomari in European journal of environmental and civil engineering, Vol. 16 Supplément N° 1 (Juin 2012) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 16 Supplément N° 1 (Juin 2012) . - pp. s2-s16 Titre : Study of the transfer of metallic elements through sand/bentonite layers Type de document : texte imprimé Auteurs : Fouad Ghomari, Auteur ; Abdelillah Bezzar, Auteur ; Chahrazed Abdellaoui, Auteur Année de publication : 2012 Article en page(s) : pp. s2-s16 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Clay  Landfills  Heavy  metals  Permeability  Lixiviation  tests  Diffusion Résumé : Contamination of water resources, due either to the absence or the bad conception of waterproof barriers in controlled landfills, represents a major threat to public health. Previous studies have been carried out on the impact of landfill sites on water resources and to find solutions to improve prevention. For this purpose, and for effective installation of a landfill, passive security must be provided by a waterproof barrier, e.g. a clay material with a very low permeability (< 10–9 m s–1) and capable of retaining polluting elements diffusing through the ground. The main objective of our research is to study the adsorption behaviour of bentonite in the presence of metallic solutions as well as the diffusive behaviour through sand + bentonite mixture columns, by evaluating the concentration profiles estimated in time and space. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.682444 [article] Study of the transfer of metallic elements through sand/bentonite layers [texte imprimé] / Fouad Ghomari, Auteur ; Abdelillah Bezzar, Auteur ; Chahrazed Abdellaoui, Auteur . - 2012 . - pp. s2-s16. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 16 Supplément N° 1 (Juin 2012) . - pp. s2-s16 Mots-clés : Clay  Landfills  Heavy  metals  Permeability  Lixiviation  tests  Diffusion Résumé : Contamination of water resources, due either to the absence or the bad conception of waterproof barriers in controlled landfills, represents a major threat to public health. Previous studies have been carried out on the impact of landfill sites on water resources and to find solutions to improve prevention. For this purpose, and for effective installation of a landfill, passive security must be provided by a waterproof barrier, e.g. a clay material with a very low permeability (< 10–9 m s–1) and capable of retaining polluting elements diffusing through the ground. The main objective of our research is to study the adsorption behaviour of bentonite in the presence of metallic solutions as well as the diffusive behaviour through sand + bentonite mixture columns, by evaluating the concentration profiles estimated in time and space. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.682444

Use of plant aggregates in building ecomaterials / Camille Magniont in European journal of environmental and civil engineering, Vol. 16 Supplément N° 1 (Juin 2012) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 16 Supplément N° 1 (Juin 2012) . - pp. s17-s33 Titre : Use of plant aggregates in building ecomaterials Type de document : texte imprimé Auteurs : Camille Magniont, Auteur ; Gilles Escadeillas, Auteur ; Marie Coutand, Auteur Année de publication : 2012 Article en page(s) : pp. s17-s33 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Plant  aggregate  Hemp  shiv  Sunflower  pith  Durability  Eco-friendly  building  material Résumé : The aim of this paper is to compare hemp shiv and sunflower pith properties when they are used as plant aggregates incorporated into a pozzolanic matrix. Scanning electron microscope observation of these aggregates showed distinct microstructures, which could be responsible for the differences in mechanical and thermal behaviour observed between composites including these two types of plant aggregates. The long-term behaviour of composites revealed the mineralization of plant aggregates, in particular hemp shiv, by calcium compounds. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.682452 [article] Use of plant aggregates in building ecomaterials [texte imprimé] / Camille Magniont, Auteur ; Gilles Escadeillas, Auteur ; Marie Coutand, Auteur . - 2012 . - pp. s17-s33. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 16 Supplément N° 1 (Juin 2012) . - pp. s17-s33 Mots-clés : Plant  aggregate  Hemp  shiv  Sunflower  pith  Durability  Eco-friendly  building  material Résumé : The aim of this paper is to compare hemp shiv and sunflower pith properties when they are used as plant aggregates incorporated into a pozzolanic matrix. Scanning electron microscope observation of these aggregates showed distinct microstructures, which could be responsible for the differences in mechanical and thermal behaviour observed between composites including these two types of plant aggregates. The long-term behaviour of composites revealed the mineralization of plant aggregates, in particular hemp shiv, by calcium compounds. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.682452

Monitoring of clogging evolution in the stormwater infiltration system and determinant factors / Carolina Gonzalez-Merchan in European journal of environmental and civil engineering, Vol. 16 Supplément N° 1 (Juin 2012) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 16 Supplément N° 1 (Juin 2012) . - pp. s34-s47 Titre : Monitoring of clogging evolution in the stormwater infiltration system and determinant factors Type de document : texte imprimé Auteurs : Carolina Gonzalez-Merchan, Auteur ; Sylvie Barraud, Auteur ; Sébastien Le Coustumer, Auteur Année de publication : 2012 Article en page(s) : pp. s34-s47 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : In  situ  observation  Infiltration  Clogging  Stormwater Résumé : Infiltration is widely used to manage stormwater in cities and their suburbs. Despite its advantages, questions remain about its long-term performance, in particular the potential for clogging. To address this problem, a field study was undertaken to assess the evolution of clogging over time by means of hydraulic resistance (R) measurements. The experiment was carried out on an infiltration basin continuously monitored for 7 years from 2004 to 2010. The work shows that clogging takes place progressively and can be slowed down by the growth of vegetation. It also showed that the variation from one event to another presented high variability. The variation of successive R-values per time unit has been statistically explained by the variation per time unit of two groups of factors: one linked to physical aspects (water volume and particle load), and more interestingly one linked to biological clogging (solar energy and air temperature), which is generally not considered for these systems. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.682457 [article] Monitoring of clogging evolution in the stormwater infiltration system and determinant factors [texte imprimé] / Carolina Gonzalez-Merchan, Auteur ; Sylvie Barraud, Auteur ; Sébastien Le Coustumer, Auteur . - 2012 . - pp. s34-s47. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 16 Supplément N° 1 (Juin 2012) . - pp. s34-s47 Mots-clés : In  situ  observation  Infiltration  Clogging  Stormwater Résumé : Infiltration is widely used to manage stormwater in cities and their suburbs. Despite its advantages, questions remain about its long-term performance, in particular the potential for clogging. To address this problem, a field study was undertaken to assess the evolution of clogging over time by means of hydraulic resistance (R) measurements. The experiment was carried out on an infiltration basin continuously monitored for 7 years from 2004 to 2010. The work shows that clogging takes place progressively and can be slowed down by the growth of vegetation. It also showed that the variation from one event to another presented high variability. The variation of successive R-values per time unit has been statistically explained by the variation per time unit of two groups of factors: one linked to physical aspects (water volume and particle load), and more interestingly one linked to biological clogging (solar energy and air temperature), which is generally not considered for these systems. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.682457

Comparison between photomodelling and laser scanning to create a 3D model for a digital health record / Xavier Brunetaud in European journal of environmental and civil engineering, Vol. 16 Supplément N° 1 (Juin 2012) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 16 Supplément N° 1 (Juin 2012) . - pp. s48-s63 Titre : Comparison between photomodelling and laser scanning to create a 3D model for a digital health record Type de document : texte imprimé Auteurs : Xavier Brunetaud, Auteur ; Chiara Stefani, Auteur ; Sarah Janvier-Badosa, Auteur Année de publication : 2012 Article en page(s) : pp. s48-s63 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Photogrammetry  Laser  scanner  3D  modelling  Cultural  heritage Résumé : This work deals with the creation of a digital health record for the Castle of Chambord (Loire Valley, France) to establish a detailed diagnosis of the state of deterioration of the monument. This digital health record aims to provide a basis for scientific monitoring and planning of restoration work by referencing data (mapping of deterioration and architectural and historical archives) on a Web-based documentation platform. The starting point is building a 3D model of the monument. This 3D model must meet specific requirements for its subsequent use, including the ability to be unfolded in 2D with visual consistency. The method to be used for 3D acquisition depends on a balance between speed of execution, cost, and compatibility with respect to data organisation. This paper presents a comparative study between photomodelling and laser scanning. The different steps needed to build a reliable 3D model with both techniques are demonstrated along with a critique of the advantages and disadvantages of each. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.681957 [article] Comparison between photomodelling and laser scanning to create a 3D model for a digital health record [texte imprimé] / Xavier Brunetaud, Auteur ; Chiara Stefani, Auteur ; Sarah Janvier-Badosa, Auteur . - 2012 . - pp. s48-s63. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 16 Supplément N° 1 (Juin 2012) . - pp. s48-s63 Mots-clés : Photogrammetry  Laser  scanner  3D  modelling  Cultural  heritage Résumé : This work deals with the creation of a digital health record for the Castle of Chambord (Loire Valley, France) to establish a detailed diagnosis of the state of deterioration of the monument. This digital health record aims to provide a basis for scientific monitoring and planning of restoration work by referencing data (mapping of deterioration and architectural and historical archives) on a Web-based documentation platform. The starting point is building a 3D model of the monument. This 3D model must meet specific requirements for its subsequent use, including the ability to be unfolded in 2D with visual consistency. The method to be used for 3D acquisition depends on a balance between speed of execution, cost, and compatibility with respect to data organisation. This paper presents a comparative study between photomodelling and laser scanning. The different steps needed to build a reliable 3D model with both techniques are demonstrated along with a critique of the advantages and disadvantages of each. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.681957

Mechanical behaviour of repair mortars / Abdenour Alliche in European journal of environmental and civil engineering, Vol. 16 Supplément N° 1 (Juin 2012) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 16 Supplément N° 1 (Juin 2012) . - pp. s64-s77 Titre : Mechanical behaviour of repair mortars Type de document : texte imprimé Auteurs : Abdenour Alliche, Auteur ; Amjad Mallat, Auteur Année de publication : 2012 Article en page(s) : pp. s64-s77 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Repair  mortars  Mechanical  behaviour  Interfacial  zone  Bond  strength Résumé : We investigate two repair mortars using mechanical tests specifically developed for this type of material. The first is a fibre reinforced lime-based mortar, which contains thickening agent and limestone additions. The second is a fibre reinforced ordinary mortar, which contains a small quantity of silica fume and additives. The mechanical characterisation of the materials is based on tension, compression and three-point bending tests. The bond between the repair mortars and substrate was investigated by slant shear and flexural bonding tests. The results obtained have demonstrated the influence of the surface roughness and moisture conditions on the bond strength. Finally, scanning electron microscope observations have showed the morphology of the repair mortar-to-substrate interfacial zone. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.681958 [article] Mechanical behaviour of repair mortars [texte imprimé] / Abdenour Alliche, Auteur ; Amjad Mallat, Auteur . - 2012 . - pp. s64-s77. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 16 Supplément N° 1 (Juin 2012) . - pp. s64-s77 Mots-clés : Repair  mortars  Mechanical  behaviour  Interfacial  zone  Bond  strength Résumé : We investigate two repair mortars using mechanical tests specifically developed for this type of material. The first is a fibre reinforced lime-based mortar, which contains thickening agent and limestone additions. The second is a fibre reinforced ordinary mortar, which contains a small quantity of silica fume and additives. The mechanical characterisation of the materials is based on tension, compression and three-point bending tests. The bond between the repair mortars and substrate was investigated by slant shear and flexural bonding tests. The results obtained have demonstrated the influence of the surface roughness and moisture conditions on the bond strength. Finally, scanning electron microscope observations have showed the morphology of the repair mortar-to-substrate interfacial zone. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.681958

Methodology and tools for risk evaluation in construction projects using Risk Breakdown Structure / Mehdizadeh Rasool in European journal of environmental and civil engineering, Vol. 16 Supplément N° 1 (Juin 2012) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 16 Supplément N° 1 (Juin 2012) . - pp. s78-s98 Titre : Methodology and tools for risk evaluation in construction projects using Risk Breakdown Structure Type de document : texte imprimé Auteurs : Mehdizadeh Rasool, Auteur ; Taillandier Franck, Auteur ; Denys Breysse, Auteur Année de publication : 2012 Article en page(s) : pp. s78-s98 Note générale : Génie Civil Langues : Français (fre) Mots-clés : Risk  management  Risk  breakdown  structure  Construction  Risk  analysis  Project  risk Résumé : Risk Breakdown Structure (RBS) is a hierarchically organised depiction of the identified project risks arranged by risk category and subcategory that identifies the various areas and causes of potential risks. This type of representation has many advantages and is a suitable tool especially for risk management of construction projects, since it offers a synthetic view on risks, each stakeholder can have his or her own view on the project and it is compatible with evolutionary and dynamic nature of project risks. However, RBS suffers several drawbacks such as lack of consensus on how to develop an RBS for a new project, lack of clarity and inconsistencies in definition of risk categories and lack of rules enabling transfer of qualitative/quantitative information of risks across the tree. This article will focus on the last case, proposing an advanced method for measurement and propagation of risks in RBS. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.681959 [article] Methodology and tools for risk evaluation in construction projects using Risk Breakdown Structure [texte imprimé] / Mehdizadeh Rasool, Auteur ; Taillandier Franck, Auteur ; Denys Breysse, Auteur . - 2012 . - pp. s78-s98. Génie Civil Langues : Français (fre) in European journal of environmental and civil engineering > Vol. 16 Supplément N° 1 (Juin 2012) . - pp. s78-s98 Mots-clés : Risk  management  Risk  breakdown  structure  Construction  Risk  analysis  Project  risk Résumé : Risk Breakdown Structure (RBS) is a hierarchically organised depiction of the identified project risks arranged by risk category and subcategory that identifies the various areas and causes of potential risks. This type of representation has many advantages and is a suitable tool especially for risk management of construction projects, since it offers a synthetic view on risks, each stakeholder can have his or her own view on the project and it is compatible with evolutionary and dynamic nature of project risks. However, RBS suffers several drawbacks such as lack of consensus on how to develop an RBS for a new project, lack of clarity and inconsistencies in definition of risk categories and lack of rules enabling transfer of qualitative/quantitative information of risks across the tree. This article will focus on the last case, proposing an advanced method for measurement and propagation of risks in RBS. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.681959

Extrudable reactive powder concretes / Pierre Mounanga in European journal of environmental and civil engineering, Vol. 16 Supplément N° 1 (Juin 2012) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 16 Supplément N° 1 (Juin 2012) . - pp. s99-s114 Titre : Extrudable reactive powder concretes : Hydration, shrinkage and transfer properties Type de document : texte imprimé Auteurs : Pierre Mounanga, Auteur ; Khalid Cherkaoui, Auteur ; Abdelhafid Khelidj, Auteur Année de publication : 2012 Article en page(s) : pp. s99-s114 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Reactive  powder  concrete  Extrusion  Hydration  Shrinkage  Durability Résumé : The behaviour of five reactive powder concretes (RPC), with four of them being extrudable, has been studied from the first minutes up to more than 90 days. The extrusion force, hydration rate, free autogenous shrinkage at early age, mechanical properties and durability parameters were measured. The performance analysis showed the benefits of a partial substitution of silica fume with crushed quartz on the RPC properties. The cost/performances analysis highlighted that the main advantage of using RPC lies in their potential of durability, which is 10 to 100 times higher than that of ordinary or high-performance concretes, according to the property considered. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.681961 [article] Extrudable reactive powder concretes : Hydration, shrinkage and transfer properties [texte imprimé] / Pierre Mounanga, Auteur ; Khalid Cherkaoui, Auteur ; Abdelhafid Khelidj, Auteur . - 2012 . - pp. s99-s114. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 16 Supplément N° 1 (Juin 2012) . - pp. s99-s114 Mots-clés : Reactive  powder  concrete  Extrusion  Hydration  Shrinkage  Durability Résumé : The behaviour of five reactive powder concretes (RPC), with four of them being extrudable, has been studied from the first minutes up to more than 90 days. The extrusion force, hydration rate, free autogenous shrinkage at early age, mechanical properties and durability parameters were measured. The performance analysis showed the benefits of a partial substitution of silica fume with crushed quartz on the RPC properties. The cost/performances analysis highlighted that the main advantage of using RPC lies in their potential of durability, which is 10 to 100 times higher than that of ordinary or high-performance concretes, according to the property considered. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.681961

Compression triaxial behavior of concrete / Cedric Poinard in European journal of environmental and civil engineering, Vol. 16 Supplément N° 1 (Juin 2012) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 16 Supplément N° 1 (Juin 2012) . - pp. s115-s136 Titre : Compression triaxial behavior of concrete : The role of the mesostructure by analysis of X-ray tomographic images Type de document : texte imprimé Auteurs : Cedric Poinard, Auteur ; Ewa Piotrowska, Auteur ; Yann Malécot, Auteur Année de publication : 2012 Article en page(s) : pp. s115-s136 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Concrete  Triaxial  loading  X-ray  tomography  Porosity  Damage  mechanisms Résumé : This paper is intended to assess the mesostructural damage mechanisms of concrete under hydrostatic and triaxial loadings. Such a study is possible thanks to two state-of-the-art laboratory instruments: a high-pressure triaxial press, and an X-ray computed tomography instrument. The laboratory protocol consists of scanning the concrete prior to the initial loading and after each cycle. An analysis of the resulting images indicates that under high hydrostatic loading, significant damage is visible in cement paste at the mesoscopic scale. For two triaxial tests conducted at 50 and 650 MPa of confining pressure, results reveal major differences in both damage and failure mechanisms. At the lower pressure, shear loading creates a localised failure mechanism characterised by sliding on an inclined plane, whereas at the higher pressure, the strain and damage mode are much more homogeneous with a failure localisation after unloading. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.682458 [article] Compression triaxial behavior of concrete : The role of the mesostructure by analysis of X-ray tomographic images [texte imprimé] / Cedric Poinard, Auteur ; Ewa Piotrowska, Auteur ; Yann Malécot, Auteur . - 2012 . - pp. s115-s136. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 16 Supplément N° 1 (Juin 2012) . - pp. s115-s136 Mots-clés : Concrete  Triaxial  loading  X-ray  tomography  Porosity  Damage  mechanisms Résumé : This paper is intended to assess the mesostructural damage mechanisms of concrete under hydrostatic and triaxial loadings. Such a study is possible thanks to two state-of-the-art laboratory instruments: a high-pressure triaxial press, and an X-ray computed tomography instrument. The laboratory protocol consists of scanning the concrete prior to the initial loading and after each cycle. An analysis of the resulting images indicates that under high hydrostatic loading, significant damage is visible in cement paste at the mesoscopic scale. For two triaxial tests conducted at 50 and 650 MPa of confining pressure, results reveal major differences in both damage and failure mechanisms. At the lower pressure, shear loading creates a localised failure mechanism characterised by sliding on an inclined plane, whereas at the higher pressure, the strain and damage mode are much more homogeneous with a failure localisation after unloading. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.682458

Historicity of the material concrete in the city of Tlemcen / L. Sail in European journal of environmental and civil engineering, Vol. 16 Supplément N° 1 (Juin 2012) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 16 Supplément N° 1 (Juin 2012) . - pp. s137-s147 Titre : Historicity of the material concrete in the city of Tlemcen Type de document : texte imprimé Auteurs : L. Sail, Auteur ; F. Ghomari, Auteur ; A. Megnounif, Auteur Année de publication : 2012 Article en page(s) : pp. s137-s147 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Cartography  Concrete  Data  bank  Historicity  Tlemcen  Durability Résumé : The answer to the relative question of the first use of concrete as material of construction in the domain of the building in Algeria and especially in the city of Tlemcen, situated in the west north of Algeria, constitutes the main object of this work. We leaned on the archives of Tlemcen in order to collect all relative information to the different available construction projects. The period and topic of our study spreads from 1892 to 1962 while sweeping almost than one century of realisations in Tlemcen. The 83 projects studied permitted us to elaborate the embryo of a data bank whose exploitation drove us to distinguish three periods where the process of construction witnessed a certain number of evolutions, notably in relation to the historicity of the use of the concrete. A cartography inserting these different projects has been established in software under Autocad format in order to visualize the projects in question and all information that refer there. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.681962 [article] Historicity of the material concrete in the city of Tlemcen [texte imprimé] / L. Sail, Auteur ; F. Ghomari, Auteur ; A. Megnounif, Auteur . - 2012 . - pp. s137-s147. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 16 Supplément N° 1 (Juin 2012) . - pp. s137-s147 Mots-clés : Cartography  Concrete  Data  bank  Historicity  Tlemcen  Durability Résumé : The answer to the relative question of the first use of concrete as material of construction in the domain of the building in Algeria and especially in the city of Tlemcen, situated in the west north of Algeria, constitutes the main object of this work. We leaned on the archives of Tlemcen in order to collect all relative information to the different available construction projects. The period and topic of our study spreads from 1892 to 1962 while sweeping almost than one century of realisations in Tlemcen. The 83 projects studied permitted us to elaborate the embryo of a data bank whose exploitation drove us to distinguish three periods where the process of construction witnessed a certain number of evolutions, notably in relation to the historicity of the use of the concrete. A cartography inserting these different projects has been established in software under Autocad format in order to visualize the projects in question and all information that refer there. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.681962

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