Publications Internationales
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Item Adsorption of yellow bemacid CM-3R dye from aqueous solutions onto raw and sodium bentonite(2012) Ouslimani, Nassira; Zibouche, Fatima; Iratni, A.; Abadlia, Mohamed TaharDischarges from the textile industries are heavily loaded with various dyes which requires their treatment. The most common method is to adsorb on solids high surface area, for example, clay material highly available and whose leaves are good natural adsorbents. In present study we used a local bentonite available in its natural form and sodium form for the adsorption of a dye CM-3R yellow bemacid provided by BEZEMA. The evaluation of the effect of various variables is driven by a series of experiments as the contact time, initial concentration of the dye, the initial pH. The different parameters show that the adsorption of the dye is favoured to 240 min, pH 2 and a temperature of 19 ºC. The sodium bentonite yielded good performance results due to the improvement of its adsorption properties. The best correlation of experimental results are obtained with the Langmuir model for sodium bentonite (R % = 0.998) and Freundlich for the raw bentonite (0997)Item Apport des fillers calcaires à la durabilité des BHP en milieu sulfatique(2006) Chaid, R.; Bali, A.; Abadlia, Mohamed Tahar; Jauberthie, R.La formulation des bétons est quasiment toujours basée sur leur fonction structurale. Les milieux environnementaux d'utilisation n'interviennent pratiquement que sur le choix de la nature du liant et accessoirement des granulats. Dans des situations plus ou moins agressives, ce ne sont plus les effets des charges qui déterminent la durée de vie de la structure, mais plutôt la qualité du béton qui influence la facilité avec laquelle l'agent agressif modifie l'esthétique puis pénètre et s'attaque à l'intégrité de la structure. L'objet de la présente étude consiste à formuler des bétons à hautes performances (BHP) avec et sans ajout. Une substitution partielle du ciment par des fines calcaires améliore le comportement des bétons dans l'eau séléniteuse. Les mécanismes de dégradations ont été reliés au développement de la microstructure du matériau. Ils sont observés au microscope électronique à balayage (MEB) et quantifiés par diffraction des rayons X (DRX). Ces examens ont été complétés par des mesures de propagation d'onde sonore et de résistances mécaniquesItem Caractérisation du comportement mécanique différé du bois d'Eucalyptus camaldulensis Dehnh vert provenant de Boudouaou (Algérie) à haute température (120 °C)(2009) Tazrout, M.; Abadlia, Mohamed Tahar; Perre, P.L'objectif de ce travail est la caractérisation mécanique différée de bois d'Eucalyptus camaldulensis Dehnh vert provenant de Boudouaou (Boumerdes, Algérie) à haute température (jusqu'à 120 °C). Notre choix s'est porté sur l'étude du bois d'Eucalyptus camaldulensis en raison de l'importance économique de cette espèce qui représente environ 43 235 ha avec une possibilité récoltable de 144 800 m3/an. L'étude expérimentale du comportement différé du bois vise essentiellement à prédire le comportement des structures en bois et aussi à mieux maîtriser les aspects négatifs ou positifs de ce comportement différé lors des opérations de : séchage, étuvage, thermoformage... Le dispositif de fluage sur du bois vert utilisé au LERMAB-ENGREF est un autoclave doté d'un régulateur programmable qui permet de choisir toute évolution temporelle de température entre la température ambiante et 130 °C, en restant sous condition de vapeur saturante. Par conséquent, les effets mécanosorptifs sont éliminés. Ce dernier est doté de capteurs type LVDT pour la mesure de la déformation des éprouvettes iso contraintes. De nombreux essais ont déjà été effectués sur de l'épicéa et le chêne et ont donné des mesures très reproductibles et fiables [J. Passard, P. Perré, Ann. For. Sci. L. (2005) 707-717]. Les mesures effectuées sur le bois d'Eucalyptus camaldulensis Dehnh en direction tangentielle, ont donné une déformation importante du bois vert à haute température et ont permis la détermination des coefficients de fluage et des modules d'élasticité dans des conditions très sévères de température (120 °C) et de pressionItem Compressive behaviour of concrete elements confined with GFRP-prefabricated bonded shells(Taylor and Francis, 2015) Beddiar, A.; Zitoune, R.; Collombet, F.; Grunevald, Y.H.; Abadlia, Mohamed Tahar; Bourahla, N.Item Effet du chlorure de sodium sur la durabilité des BHP(2012) Chaid, Rabah; Jauberthie, Raoul; Abadlia, Mohamed TaharItem Étude de la récupération du collapse par microdensitométrie avec du bois d'eucalyptus camaldulensis dehn provenant de beghla en Algérie = Microdensitometric study of recovery from collapse in eucalyptus camaldulensis dehn wood from beghla in Algeria(2012) Tazrout, M.; Abadlia, Mohamed Tahar; Mothe, F.Item Etude du comportement mécanique du béton cellulaire autoclaveé : influence de la vitesse de déformation(2011) Belouettar, R.; Klepaczko, J. R.; Abadlia, Mohamed TaharCe travail pre'sente une e'tude expe'rimentale du comportement me'canique du be'ton cellulaire autoclave'. L'e'tude a port6 essentiellement sur me sine d'essais dcaniques en compression quasi statique ir diyirentes vitesses de d6formation variables entre 10-4 s-1 et 10 s-' et ir deux e'tats dae'rents (e'tat sec et Ctat sature' d'eau). En ge'ne'ral, l'augmentation a2 la vitesse de diformation donne une augmentation de la contrainte critique du be'ton cellulaire autoclavk Le be'ton cellulaire autoclave' pre'sente une sensibilite' ir la vitesse de de'formation positive. La valeur du module d'e'lasticite' est proche de la valeur stMdard (1.5 GPa) pour un be'ton cellulaire autoclave' de masse volwnique &ale ir 500- 550 kg I m3Item External corrosion to concrete sewers : a case study(2012) Oualit, M.; Jauberthie, R.; Rendell, F.; Melinge, Y.; Abadlia, Mohamed TaharThe aim of this study was to investigate the deterioration of concrete sewers and identify responsible factors; this investigation was a part of an ongoing asset evaluation for Rennes (France). The sewer studied was a 300 mm spun concrete pipe laid in 1992. Core samples (D 28 mm, L 40 mm) were taken from different areas of a pipe (invert, crown and side wall) and analysed to quantify the condition of the concrete and the extent of damage to the internal and external surface of the pipe. Physical and mechanical properties of the material were characterised. The depassivation of the concrete was measured by testing with a phenolphthalein solution. The study showed that in this particular case the external corrosion was extensive with minimal internal corrosion. It is proposed that the corrosion was possibly linked to the use of a contaminated backfill or organic acids in the ground water. Recommendations are proposed concerning the direction of future researchItem Improvement of rheological behaviour of cement pastes by incorporating metakaolin(2010) Mansour, M.S.; Abadlia, Mohamed Tahar; Bekkour, K.; Messaoudene, I.An experimental rheological investigation was conducted to evaluate the performance of Algerian metakaolin MK on cement pastes. In the present work, several rheological tests were carried out at 20°C, by using the stress controlled rheometer AR2000, on the fresh cement pastes incorporating 0%, 5%, 10%, 15% and 20% of MK. Effect of metakaolin on the rheological behaviour of cement pastes were discussed. Rheological parameters such as viscosity, compliance, loss and storage shear modulus are evaluated by means of rheological techniques of both flow and creep/recovery tests (static mode) and oscillatory test (dynamic mode). Shear moduli allow to give information on the evolution of the paste structure related to practically interesting problems such as workability. The results obtained have shown that MK improves the flowability and exhibits viscous rheological behaviour of cement pastes over elastic behaviour of control paste (0%MK). Moreover, the creep/recovery test show that the addition of MK exhibits a behaviour of viscoelastic liquid of cement pastes compared to a viscoelastic solid behaviour of control paste. The MK acts as filler and controls rheologyItem Metakaolin as a pozzolan for high-performance mortar = Metakaolin jako dodatek pucolanowy modyfikuja{ogonek}cy właściwości zapraw(2012) Mansour, M.S.; Abadlia, Mohamed Tahar; Janberthie, R.; Messaoudene, I.Cement mortars were produced in which 10% of Portland cement was replaced by metakaolin. The physical properties i.e. shrinkage and mechanical strength of the mortar were studied. The results show that the metakaolin slows cement hydration, decreases the conductivity and the pH of cement suspensions and increases the setting time of cement paste. Due to these changes the plastic viscosity and workability of mix concrete are enhanced. The compressive strength of mortar with metakaolin addition is close to the strength of reference mortar after 28 days, but early strength is lower. Moreover, the metakaolin addition is increasing shrinkage in relation to the reference mortarItem Metakaolin-slag-clinker blends.the role of Na+ or K+ as alkaline activators of theses ternary blends(Wiley Periodicals, 2013) Fernández-Jiménez, Ana; Zibouche, Fatima; Boudissa, Nassima; García-Lodeiro, Ines; Abadlia, Mohamed Tahar; Palomo, AngelItem Microdensitometric study of recovery from collapse in eucalyptus camaldulensis dehn wood from beghla in algeria(2012) Tazrout, M.; Abadlia, Mohamed Tahar; Mothe, F.This study deals with recovery from collapse in Eucalyptus camaldulensis Dehn wood from the Beghla station in Algeria, which covers about 500 ha. Three trees were analysed from two radial strips (six strips in all) cut from the top and bottom of each tree stem. An initial microdensitometric analysis was performed on the samples after air-drying. The samples were then reconditioned and dried again to the initial moisture content for a second microdensitometric analysis. Collapse was largely reduced by the reconditioning process The wood density profiles obtained before and after reconditioning were compared, and the relative decrease in wood density on recovery was used as an indicator of collapse. Our results show that the indicator value varied in inverse proportion to the wood density between samples and at the intra-ring level, but decreased substantially with sapwood densityItem Pérennisation des ouvrages en génie civil : diagnos tic et inspection des bétons d’egouts(2012) Oualit, M.; Abadlia, Mohamed Tahar; Hami, B.La durabilité des bétons dans les réseaux d'assaini ssement est principalement affectée par l’action combinée, chimique (sels, sulfates, acides...), mécaniques (poinçonnement, abrasion...) et biologiques (bactéries aérobies, anaérobies...) provoquant une détérioration souvent de la matrice cimentaire. Ces dégradations sont souvent aggravées en fonction de la vitesse, la nature, la concentration et le pH ai nsique les conditions environnementales aux alentours (taux d’oxygène, empérature...etc). L’objectif de ce travail qui a été réalisé à l’INSA de Rennes consiste à effectuer une étude sur la dégradation et les facteurs responsables d’altération du béton employé dans le réseau d’égouts de la ville de Rennes. Ainsi, des échantillons prélevés dans différentes zones (radier, medium et toit) d’une conduite ont été analysés à l’aide de moyens d’investigation afin de mettre en évidence l’état d’endommagement interne due aux effluents et externe (sol) de résea u ainsi que les modifications chimiques et minéralogiques enregistrées. Ces essais sont complé tés par une caractérisation physique et mécanique. Dans cet article, nous présentons les résultats de l’inspection d’un tronçon dont les sollicitations prédominantes sont en majorité chimiques et abrasiv es. Cette étude met clairement en évidence la très fort e anisotropie des dégradations aussi bien internes qu’externes. Enfin, des ecommandations seront proposées en adéquation avec l’environnement ainsi qu’une évaluation de la perte de performance des conduitsItem Pérennisation des ouvrages en génie civil : diagnostic et inspection des bétons d’égouts(2012) Oualit, Mehena; Abadlia, Mohamed Tahar; Jauberthie, RaoulItem Performance and analysis of concrete in sewer environment : anisotropy of damage(2011) Oualit, M.; Jauberthie, R.; Melinge, Y.; Abadlia, Mohamed TaharThe costs associated with the provision and maintenance of drinking water and wastewater infrastructure represents a significant financial demand worldwide. Maintenance costs are disproportionately high, indicating a lack of adequate durability. The aim of this paper is to study the degradation mode and the responsible factors of deterioration concrete pipe, used in the sewage’s city of Rennes (France). Thus, samples taken from different areas of the pipe (Raft, medium and roof) were analyzed using investigation methods in order to illustrate the internal and external rate of damage, caused by effluents and ground. In addition, chemical and mineralogical changes recorded were identified using scanning electron micrographs (SEM). In this research program, chemical and mechanical studies were performed by measuring the compressive and splitting tensile strengths. A phenolphthalein indicator solution is applied to a concrete specimen on a fresh fracture surface to determine the corrosion of steel reinforcement and the diseases advancement (pathologies depth). This study clearly shows the important anisotropy of both, internal and external damage. Finally, recommendations are proposed in line with the environment and possible approaches to sustainability assessment are also imposedItem Rheology of mortar and concrete containing mineral admixtures = Reologia zapraw i betonów z dodatkami mineralnymi(Foundation Cement, Lime, Concrete, 2013) Mansour, M.S.; Abadlia, Mohamed Tahar; Afalfiz, A.; Ladaoui, W.Item Structural characterization of mullite formed from heated kaolin of tamazert deposit (Algeria)(2012) Zibouche, Fatima; Kerdjoudj, H.; Abadlia, Mohamed TaharA quantitative analysis of the mullite phase obtained after sintering of the kaolin has been performed by treatment of X ray diagrams. Kaolin is treated in the range of 950-1400 *deg;C. The oxide NiO is added as internal standard after cooling to sintered sample kaolin. Bragg Brentano diffractometer, scanning electron microscopy and differential thermal analysis were used. Analyses of selected directions profile of mullite were carried out by using the adjustment of program, available in the software Highscore of Pan Analytical. The mullite phase that formed from kaolin appears at 1000 °C, observed by XRD and tallies with DTA. The primary mullite crystal showed a plate-like morphology. Two kinds of morphology corresponding to primary (elongated grains) and secondary (equiaxed grains) mullite were observed. A bimodal crystallite size distribution was detected through XRD microstructural analysis from 1300 °C. The apparent sizes obtained of crystallites are determined for mullite with directions-dependent (anisotropy)Item Study of reconditioning of the Eucalyptus camaldulensis dehn(2010) Tazerout, M.; Abadlia, Mohamed Tahar; Oudia, A.Item Thermal behaviour of kaolin of tamazert (Algeria) deposit(2012) Zibouche, Fatima; Kerdjoudj, H.; Abadlia, Mohamed TaharKaolin from Tamazert deposit in the north Algeria was used in this study. The physical and chemical properties were determined by the performance of several analyses as well as the X-ray fluorescence, X-ray diffraction, thermal behaviour (ATD, TG), dilatometric and granulometric distribution. The study of ceramic behaviour as function of firing temperature has been investigated by shrinkage, adsorption both density and mechanical tests after gradually increasing from room temperature to 1500 °C. The modification of the structure of the raw material samples has been observed after fining and the crystallization of mullite and amorphous silica phase were confirmed by scanning microscopy SEM and evaluated by XRD. The suitability of kaolin for ceramics process was discussed from the linear shrinkage, both density and open porosity. The amorphous phase content is varied from 27-34 % and the tests of flexion have been carried out as depending of temperature, revealed a suitable mechanical properties and the relationship between amorphous phase and sample properties. The adsorption rate was found to be about 35%Item Valorization of fibrous waste for the wastewater discoloration(2013) Ouslimani, Nassira; Zrari, F.; Abadlia, Mohamed Tahar; Benabed, H.