Détail de l'auteur
Auteur Mohamed Rissel Khelifa |
Documents disponibles écrits par cet auteur (3)
Affiner la recherche Interroger des sources externesComparaison des résistances mécaniques des bétons renforcés de fibres synthétiques et de fibres naturelles soumis à des agressions chimiques. / Sami Ziane
Titre : Comparaison des résistances mécaniques des bétons renforcés de fibres synthétiques et de fibres naturelles soumis à des agressions chimiques. Type de document : texte imprimé Auteurs : Sami Ziane, Auteur ; Mohamed Rissel Khelifa, Directeur de thèse Mention d'édition : 06/07/2020 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2020 Importance : 155 f. Format : 30 cm. Note générale : Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Génie CivilTags : Génie civil: Matériaux Béton Fibres Alfa Chanvre polypropylène performances mécaniques durabilité attaques sulfatiques Concrete Fibers Hemp Polypropylene mechanical performances durability sulfatic attacks خرسانة الياف الحلفاء قلب البولي بروبلين أداء ميكانيكي مثانة هجوم الكبريتات Index. décimale : 624 Génie civil Résumé :
oncrete structures are often exposed to aggressive environments because of the air pollution to which they are exposed or that of the land on which they are built. Such pollution can be natural, such as construction on gypsum soils, or industrial, such as the release of chemicals into the atmosphere or into rivers and land, as is the case with sulphates, which can cause concrete structures to expand, crack and ruin. Different fibers have been incorporated into concrete to improve its mechanical performance and thus give it greater durability. In recent years, researchers and industrialists have shown renewed interest in the use of natural fibers, particularly those of plant origin, for the reinforcement of concrete because of their economic,
social and environmental advantages. The aim of this work is to study the mechanical behavior of concrete reinforced with plant fibers, in this case alfa and hemp fibers, in the face of external sulphate attacks. We have formulated and manufactured test specimens of different types of concrete reinforced with alfa and hemp fibers with different amount, comparing them with two
control concretes, one ordinary and the other reinforced with polypropylene fibers. In order to evaluate the effect of external sulphate attacks, all the concretes were subjected to two ageing protocols: 1) complete immersion in two different sulphate solutions dosed at 12.5% sulphate, 2) an accelerated ageing protocol in the form of immersion/drying at 60°C in the same sulphate solutions. Two sulphates were used, sodium sulphates (Na2SO4) and magnesium sulphates (Mg2SO4).
The different tests used showed that concretes reinforced with 1% alfa fibers and those reinforced with 0.25% hemp fibers have shown results similar to those of ordinary concrete and polypropylene..Diplôme : Doctorat En ligne : ../theses/gcivil/ZIA7639.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11473 Comparaison des résistances mécaniques des bétons renforcés de fibres synthétiques et de fibres naturelles soumis à des agressions chimiques. [texte imprimé] / Sami Ziane, Auteur ; Mohamed Rissel Khelifa, Directeur de thèse . - 06/07/2020 . - جامعة الإخوة منتوري قسنطينة, 2020 . - 155 f. ; 30 cm.
Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Génie CivilTags : Génie civil: Matériaux Béton Fibres Alfa Chanvre polypropylène performances mécaniques durabilité attaques sulfatiques Concrete Fibers Hemp Polypropylene mechanical performances durability sulfatic attacks خرسانة الياف الحلفاء قلب البولي بروبلين أداء ميكانيكي مثانة هجوم الكبريتات Index. décimale : 624 Génie civil Résumé :
oncrete structures are often exposed to aggressive environments because of the air pollution to which they are exposed or that of the land on which they are built. Such pollution can be natural, such as construction on gypsum soils, or industrial, such as the release of chemicals into the atmosphere or into rivers and land, as is the case with sulphates, which can cause concrete structures to expand, crack and ruin. Different fibers have been incorporated into concrete to improve its mechanical performance and thus give it greater durability. In recent years, researchers and industrialists have shown renewed interest in the use of natural fibers, particularly those of plant origin, for the reinforcement of concrete because of their economic,
social and environmental advantages. The aim of this work is to study the mechanical behavior of concrete reinforced with plant fibers, in this case alfa and hemp fibers, in the face of external sulphate attacks. We have formulated and manufactured test specimens of different types of concrete reinforced with alfa and hemp fibers with different amount, comparing them with two
control concretes, one ordinary and the other reinforced with polypropylene fibers. In order to evaluate the effect of external sulphate attacks, all the concretes were subjected to two ageing protocols: 1) complete immersion in two different sulphate solutions dosed at 12.5% sulphate, 2) an accelerated ageing protocol in the form of immersion/drying at 60°C in the same sulphate solutions. Two sulphates were used, sodium sulphates (Na2SO4) and magnesium sulphates (Mg2SO4).
The different tests used showed that concretes reinforced with 1% alfa fibers and those reinforced with 0.25% hemp fibers have shown results similar to those of ordinary concrete and polypropylene..Diplôme : Doctorat En ligne : ../theses/gcivil/ZIA7639.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11473 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité ZIA/7639 ZIA/7639 Thèse Bibliothèque principale Thèses Disponible
Titre : Effet de l'attaque sulfatique externe sur la durabilité des bétons autopla?ants Type de document : texte imprimé Auteurs : Mohamed Rissel Khelifa ; Univ. de Constantine, Éditeur scientifique ; Hocine Chabil, Directeur de thèse Année de publication : 2009 Importance : 162 p. 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 : Durabilité Bétons autopla?ants Attaque sulfatique Index. décimale : 624 Génie civil En ligne : ../theses/gcivil/KHE5390.pdf Permalink : index.php?lvl=notice_display&id=603 Effet de l'attaque sulfatique externe sur la durabilité des bétons autopla?ants [texte imprimé] / Mohamed Rissel Khelifa ; Univ. de Constantine, Éditeur scientifique ; Hocine Chabil, Directeur de thèse . - 2009 . - 162 p.
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 : Durabilité Bétons autopla?ants Attaque sulfatique Index. décimale : 624 Génie civil En ligne : ../theses/gcivil/KHE5390.pdf Permalink : index.php?lvl=notice_display&id=603 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité KHE/5390 KHE/5390 Thèse Bibliothèque principale Thèses Disponible
Titre : Étude des performances et de la durabilité des bétons fibrés Type de document : texte imprimé Auteurs : Imane Mihoub, Auteur ; Mohamed Rissel Khelifa, Directeur de thèse Mention d'édition : 04/02/2021 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2021 Importance : 100 f. Format : 30 cm. Note générale : Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Génie CivilTags : Génie civil: Matériaux Fibres alfa polypropylène béton durabilité haute température polypropylene concrete durability high temperature ألياف الحلفاء بولي بروبيلين خرسانة الديمومة درجة حرارة عالية Index. décimale : 624 Génie civil Résumé :
Research on fiber-reinforced concrete has developed considerably in recent years. They are increasingly interested in reinforcing structural concrete with untreated vegetal fiber. The incorporation of fibers into concrete is intended to improve the mechanical performance of concrete such as tensile strength and cracking limitation. The use of natural fibers could be an alternative with lower environmental and economic impact compared to synthetic fibers made from petroleum derivatives. The objective of our research is the study of the behavior of fiber-reinforced concrete, more particularly with vegetal fiber, in the face of temperature rise and their durability in the face of external sulphate attack compared to synthetic fibers-reinforced
concrete. Two different fiber lengths were studied (20 and 30 mm). Five types of concrete were made, two types of concrete reinforced with 1% by volume of alfa fibers with the two lengths (AC-20 and AC-30), two concrete
reinforced with 0.22 % by volume of polypropylene fibers with the two lengths (PC-20 and PC-30) and ordinary concrete taken as control concrete (OC). The concrete samples produced were exposed to heating / cooling cycles from room temperature to a set temperature of 180, 380 and 600 °C, other samples (7x7x7 cm) were immersed in a solution dosed at 5% Na2 SO4 for 12 months. The results showed that alfa fibers can replace polypropylene fibers in the reinforcement of concrete by improving their behavior in the face of temperature rise
and their durability in the face of external sulphate attack and having a better impact on the environment.
Diplôme : Doctorat En ligne : ../theses/gcivil/MIH7710.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11544 Étude des performances et de la durabilité des bétons fibrés [texte imprimé] / Imane Mihoub, Auteur ; Mohamed Rissel Khelifa, Directeur de thèse . - 04/02/2021 . - جامعة الإخوة منتوري قسنطينة, 2021 . - 100 f. ; 30 cm.
Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Génie CivilTags : Génie civil: Matériaux Fibres alfa polypropylène béton durabilité haute température polypropylene concrete durability high temperature ألياف الحلفاء بولي بروبيلين خرسانة الديمومة درجة حرارة عالية Index. décimale : 624 Génie civil Résumé :
Research on fiber-reinforced concrete has developed considerably in recent years. They are increasingly interested in reinforcing structural concrete with untreated vegetal fiber. The incorporation of fibers into concrete is intended to improve the mechanical performance of concrete such as tensile strength and cracking limitation. The use of natural fibers could be an alternative with lower environmental and economic impact compared to synthetic fibers made from petroleum derivatives. The objective of our research is the study of the behavior of fiber-reinforced concrete, more particularly with vegetal fiber, in the face of temperature rise and their durability in the face of external sulphate attack compared to synthetic fibers-reinforced
concrete. Two different fiber lengths were studied (20 and 30 mm). Five types of concrete were made, two types of concrete reinforced with 1% by volume of alfa fibers with the two lengths (AC-20 and AC-30), two concrete
reinforced with 0.22 % by volume of polypropylene fibers with the two lengths (PC-20 and PC-30) and ordinary concrete taken as control concrete (OC). The concrete samples produced were exposed to heating / cooling cycles from room temperature to a set temperature of 180, 380 and 600 °C, other samples (7x7x7 cm) were immersed in a solution dosed at 5% Na2 SO4 for 12 months. The results showed that alfa fibers can replace polypropylene fibers in the reinforcement of concrete by improving their behavior in the face of temperature rise
and their durability in the face of external sulphate attack and having a better impact on the environment.
Diplôme : Doctorat En ligne : ../theses/gcivil/MIH7710.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11544 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité MIH/7710 MIH/7710 Thèse Bibliothèque principale Thèses Disponible
