http://dspace.univ-setif.dz:8888/jspui/handle/123456789/259 Wed, 11 Mar 2026 02:18:58 GMT 2026-03-11T02:18:58Z http://dspace.univ-setif.dz:8888/jspui/handle/123456789/334 Titre: Effet de la granulométrie sur des matériaux consolides à base d’argiles tunisiennes en présence d’une source alcaline Auteur(s): Essaidi, N.; Samet, B.; Baklouti, S.; Rossignol, S. Résumé: Les matériaux consolidés ont été synthétisés à base des argiles de Médenine et Tabarka calcinées à T =700 ou 800°C et tamisées à différentes granulométries. Afin de voir l'influence de la granulométrie sur leurs propriétés, ils ont été évalués par diverses techniques de caractérisation. Les résultats du suivi par spectroscopie infrarouge ont montré que les réactions de polycondensation augmentent au fur et à mesure que la granulométrie des argiles diminue ce qui prouve que l’attaque alcaline est plus rapide en présence d’espèces plus réactives. En revanche, l’évaluation des propriétés mécaniques des géopoly mères a révélé que la contrainte n’était pas influencée par la granulométrie des argiles. Wed, 01 Jan 2014 00:00:00 GMT http://dspace.univ-setif.dz:8888/jspui/handle/123456789/334 2014-01-01T00:00:00Z http://dspace.univ-setif.dz:8888/jspui/handle/123456789/332 Titre: Caractérisation de colluvions triasiques utilises dans l’élaboration d’ustensiles rustiques de cuisson Auteur(s): El Boudour El Idrissi, H.; Daoudi, L.; Collin, F.; Fagel, N. Résumé: he raw material used in the potter site of Talatast (Morocco) is collected from Triassic colluviums. Our study aims to characterize the mineralogical and geotechnical properties of the local clayey material before and after cooking. Our results confirm that the coarse particle size, the mineralogy of the clay fraction and the rate of fondants are suitable for the cookware material production. Defects encountered during the production are mainly related to the use of traditional ovens. Understanding the origin of the main defects could be helpful to promote the local pottery production. Wed, 01 Jan 2014 00:00:00 GMT http://dspace.univ-setif.dz:8888/jspui/handle/123456789/332 2014-01-01T00:00:00Z http://dspace.univ-setif.dz:8888/jspui/handle/123456789/330 Titre: Etude des échanges thermiques dans un four a gaz pour la cuisson des produits céramiques Auteur(s): Balli, L.; Touzani, A.; Moumouh, J. Résumé: The ceramic product is obtained after firing clay bodies formed following a fundamental change in their properties. It acquires excellent and diverse characteristics. The choice of the energy source and the firing technique are critical to the design of the furnace. Also, these are the main factors that influence the quality of the product. The temperature distribution in the gas furnace and the treated products must also be controlled to improve the quality of the heated products in terms of strength and hardness. It is for these reasons that we have explained the thermal exchanges in the ceramic furnace. Thus we propose a simplified model that determines the temporal variation of the average temperature inside the oven considered Wed, 01 Jan 2014 00:00:00 GMT http://dspace.univ-setif.dz:8888/jspui/handle/123456789/330 2014-01-01T00:00:00Z http://dspace.univ-setif.dz:8888/jspui/handle/123456789/328 Titre: Evaluation of the membranes based on the mixture biopolymers for the removal of ammonia and ammonium ions from waste waters Auteur(s): ANGAR, Y.; DJELALI, N.E Résumé: High concentrations of ammonia are commonly present in industrial wastewaters and fertilizer wastewaters which can promote the eutrophication phenomena. Although the removal of ammonium from contaminated water via polyelectrolyte was investigated in this work using a sodium poly acrylate supported on the chitosan membrane on a batch adsorption experiments. The concentration of ammonium in the receiving solution is essentially zero. Total ammonia removal could be accelerated by the driving force using the electrodes in each compartment for this liquid-liquid membrane contactor operation is the difference in ammonium partial pressure between the feed and the receiving solution. The results indicate that as preparedmixture adsorbent has faster adsorption kinetics and higher adsorption capacity than the chitosan membrane and other mixture polymers such as sodium alginate and polyvinyl alcohol/ chitosan at different ratio. All information obtained give an indication that the mixture polyelectrolyte/chitosan can be used as a novel type, fast-responsive and high-capacity sorbent material for NH 4 +-N removal. Wed, 01 Jan 2014 00:00:00 GMT http://dspace.univ-setif.dz:8888/jspui/handle/123456789/328 2014-01-01T00:00:00Z