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Titre : Comportement des bétons à base de granulats recyclés Type de document : texte imprimé Auteurs : Sabrina Saadani, Auteur ; H. Houari, Directeur de thèse Editeur : Constantine : Université Mentouri Constantine Année de publication : 2008 Importance : 132 f. Format : 30 cm Note générale : 01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C 01 CD Langues : Français (fre) Catégories : Français - Anglais
Génie CivilTags : Le béton structurel arme et précontraint Granulats Recyclage Valorisation Environnement Marbre Caractérisation Bétons Essais Comportement des bétons Granulats recyclés Aggregates Recycling Valorization Environment Marble Characterization Concretes Tests الحصى إعادةالاستعمال التقييم البيئة الرخام الميزة الخرسانات التجارب Index. décimale : 624 Génie civil Résumé : The exhaustion of the natural aggregate layers and the difficulties to open new careers force to seek new sources of supply. The recycling and the valorization of waste are today regarded as a solution with a future in order to answer the deficit between production and consumption and to protect the environment. This memoir seeks to highlight the possibility of using the marble scrap like aggregates for hydraulic concrete. In order to formulate the studied concretes, the characteristics of the aggregates recycled (marble scrap) were been analysed. The study consists in comparing the properties of a concrete of reference at the fresh and hardened state, those of the concretes incorporating of the marble aggregates in substitution of a voluminal fraction from sand, gravels and both whole with rates of substitution of (25%, 50%, 75%, 100%). The work shows the main interest which could have the development and the provision of the experimental results concerning the use of the marble scrap like aggregates recycled for hydraulic concretes. Diplôme : Magistère En ligne : ../theses/gcivil/SAA5286.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=596 Comportement des bétons à base de granulats recyclés [texte imprimé] / Sabrina Saadani, Auteur ; H. Houari, Directeur de thèse . - Constantine : Université Mentouri Constantine, 2008 . - 132 f. ; 30 cm.
01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C 01 CD
Langues : Français (fre)
Catégories : Français - Anglais
Génie CivilTags : Le béton structurel arme et précontraint Granulats Recyclage Valorisation Environnement Marbre Caractérisation Bétons Essais Comportement des bétons Granulats recyclés Aggregates Recycling Valorization Environment Marble Characterization Concretes Tests الحصى إعادةالاستعمال التقييم البيئة الرخام الميزة الخرسانات التجارب Index. décimale : 624 Génie civil Résumé : The exhaustion of the natural aggregate layers and the difficulties to open new careers force to seek new sources of supply. The recycling and the valorization of waste are today regarded as a solution with a future in order to answer the deficit between production and consumption and to protect the environment. This memoir seeks to highlight the possibility of using the marble scrap like aggregates for hydraulic concrete. In order to formulate the studied concretes, the characteristics of the aggregates recycled (marble scrap) were been analysed. The study consists in comparing the properties of a concrete of reference at the fresh and hardened state, those of the concretes incorporating of the marble aggregates in substitution of a voluminal fraction from sand, gravels and both whole with rates of substitution of (25%, 50%, 75%, 100%). The work shows the main interest which could have the development and the provision of the experimental results concerning the use of the marble scrap like aggregates recycled for hydraulic concretes. Diplôme : Magistère En ligne : ../theses/gcivil/SAA5286.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=596 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité SAA/5286 SAA/5286 Thèse Bibliothèque principale Thèses Disponible
Titre : Nanoagregats de Nickel et d’Argent : Mecanismes de formation et proprietes. Type de document : texte imprimé Auteurs : Mohamed Larbi Hioul, Auteur ; Nassira Keghouche, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 124 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : clusters agrégats nickel argent radiolyse pulsée aggregates silver pulse radiolysis لنانوجزيئات النيكل الفضة الراديوليزالنبضية Index. décimale : 530 Physique Résumé : Metallic aggregates in colloidal phases or supported aggregates attract increasing attention of researchers because of the wide range of possible applications (catalysis, environment, non-linear optics, biology and medicine). Radiolysis ranks among the most effective methods for the reduction of ions, giving the possibility of synthesis of aggregates of atoms. It is a powerful method to control the size of the particles, their location on the surface or volume. In the first part of this work, the morphological and structural properties of silver aggregates supported on silica were studied. X-ray diffraction identified the Ag6Si2O7 phase for different Ag+ ion charges as well as heat-treated samples. The FTIR spectroscopy study of Ag/SiO2 samples revealed the vibrations of Si-O-Si, Si-OH, Ag-O and Ag-SO4 bonds at the respective wave numbers 468, 810, 615 and 641 cm-1. The study of the optical properties of Ag/SiO2 nanoagreggates by UV- visible spectrophotometry showed the presence, in addition to a broadband in the visible range, three peaks in the UV domain. After reduction under hydrogen, the metal Ag phase of nanometric size was identified by XRD. In the second part, we studied, by time-resolved pulse radiolysis, nickel clusters in suspension. The formation of Ni+ ions and then those of nickel atoms was observed. The ionizing radiation generation of nickel aggregates in solution was observed for the first time live during this work.
Diplôme : Doctorat en sciences En ligne : ../theses/physique/HIO7384.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11034 Nanoagregats de Nickel et d’Argent : Mecanismes de formation et proprietes. [texte imprimé] / Mohamed Larbi Hioul, Auteur ; Nassira Keghouche, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2018 . - 124 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : clusters agrégats nickel argent radiolyse pulsée aggregates silver pulse radiolysis لنانوجزيئات النيكل الفضة الراديوليزالنبضية Index. décimale : 530 Physique Résumé : Metallic aggregates in colloidal phases or supported aggregates attract increasing attention of researchers because of the wide range of possible applications (catalysis, environment, non-linear optics, biology and medicine). Radiolysis ranks among the most effective methods for the reduction of ions, giving the possibility of synthesis of aggregates of atoms. It is a powerful method to control the size of the particles, their location on the surface or volume. In the first part of this work, the morphological and structural properties of silver aggregates supported on silica were studied. X-ray diffraction identified the Ag6Si2O7 phase for different Ag+ ion charges as well as heat-treated samples. The FTIR spectroscopy study of Ag/SiO2 samples revealed the vibrations of Si-O-Si, Si-OH, Ag-O and Ag-SO4 bonds at the respective wave numbers 468, 810, 615 and 641 cm-1. The study of the optical properties of Ag/SiO2 nanoagreggates by UV- visible spectrophotometry showed the presence, in addition to a broadband in the visible range, three peaks in the UV domain. After reduction under hydrogen, the metal Ag phase of nanometric size was identified by XRD. In the second part, we studied, by time-resolved pulse radiolysis, nickel clusters in suspension. The formation of Ni+ ions and then those of nickel atoms was observed. The ionizing radiation generation of nickel aggregates in solution was observed for the first time live during this work.
Diplôme : Doctorat en sciences En ligne : ../theses/physique/HIO7384.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11034 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité HIO/7384 HIO/7384 Thèse Bibliothèque principale Thèses Disponible
