Publications Scientifiques

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Author: search.filters.author.Safi, BrahimAuthor: search.filters.author.Benmounah, A.

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    Influence of polycarboxylate superplasticizer on hydration and rheological properties of cement pastes containing different cements
    (2014) Oubraham, Chahrazed; Benmounah, A.; Samar, Mohamed Faouzi; Safi, Brahim
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    Behavior of mortars hydraulic and organic matrix in aggressive environments
    (2013) Saidi, Mohammed; Safi, Brahim; Samar, Mohamed Faouzi; Benmounah, A.; Hamiane, Messaoud
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    Caractérisation rhéologique des fluides de forage à base d’eau, en présence d’un inhibiteur de gonflement
    (2010) Safi, Brahim; Benmounah, A.; Gueciouer, Abderazak; Samar, Mohamed Faouzi
    L’objectif de ce travail sera la mise au point de formulations de fluides de forage à base d’eau, optimisées avec l’ajout d’un inhibiteur de gonflement, destiné pour le forage de la phase 8" 3/8. Pour ce, nous avons d’abord élaboré différents systèmes à base de chlorure de potassium (KCl) et de polymère (PHPA) qui diminueront le gonflement des argiles tout en respectant les exigences environnementales. Ensuite, nous avons étudié le comportement rhéologique (viscosité plastique et yield-value) de chaque élément de la formulation en les soumettant aux effets de la température, de la salinité et de l’alcalinité, avant d’aboutir enfin à la formulation finale qui sera soumise ensuite à des tests standards, selon les normes API. Les résultats obtenus montrent une diminution significative du gonflement et la formulation retenue présente des caractéristiques physico-chimiques satisfaisantes ainsi qu’un comportement rhéologique rhéofluidifiant proche du modèle de Hershel Bulkley
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    Optimization of the process of cooking and drying of brick
    (isjaee, 2010) Saidi, Mohammed; Hamiane, Messaoud; Benmounah, A.; Safi, Brahim
    The construction materials play an enormous part in the economy of the country; this industry comprises a very varied range of products going of simple pottery passing by brick of construction until the technical porcelain and the industry of cements. As, this production takes a so important rise as the realization of manufacturing plant becomes a daily reality. This realization of quite quantitative factory that qualitative depends on the availability of a raw material of quality, means of production in good knowledge and operating condition to make allowing a perfect control of the process. Considering, the enormous part which plays the construction materials in particular the bricks of construction in the economy of the country. We were interested to make a study concerning the production unit of bricks of Boudouaou (east of Algeria) on the technological, thermal and economic level since the essential study is made on the thermal part in order to calculate the acceptable mode of cooking and to calculate the combustion of gas. The study of the heat balance enables us to know how calculations can be carried out and of knowing how and the energies brought to the furnace spent are consumed. This study enabled us to make a saving in gas in the order of 63.5 m³/h and to make a profit of energy of 266.37 kJ/kg of product and to obtain a better use of the drier and furnace with a possible maximum thermal efficiency
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    A comparative study of the creep behavior of laminated composites : effect of type of fiber and matrix
    (Academic Journals, 2017) Basaid, D.; Aribi, C.; Kari, J.; Benmounah, A.; Safi, Brahim
    This paper presents the effect of matrix type on creep behavior at 80% loads of ultimate tensile strength of two laminated composites at different fiber and matrix system. For this, two types of laminated composites were manufactured based on two types of fibers (carbon fabric and glass fabric) with different matrix systems EPOCAST 50-A1 (EP50-A), Epoxy STR (STR) and Epoxy INJ812 (INJ). The tensile and creep behavior of each laminated composite was studied in the same test conditions. A microstructural study was also investigated by SEM-microscopy on the morphology of composite specimens after creep rupture failures at 80% of applied load. The obtained results showed clearly the influence of matrix type used on the tensile and creep behavior of studied composites. Indeed, it was noted that no creep rupture failures were observed in short-term (less than 4 h) for INJ/Carbon composite at tensile creep tests at 80% loads of ultimate tensile strength. At the same ultimate tensile strength, EP50/Carbon composite showed a best creep behavior up to 30 h and had a creep modulus higher than other laminated composites. The observation of rupture facets of all composite samples showed clearly that the rupture will take place in the direction of loading, creating voids at the interface resin/fiber. These are observed based on the nature of the matrix used
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    Valorization of KCl/PHPA system of water-based drilling fluid in presence of reactive clay : application on Algerian field
    (Elsevier, 2017) Gueciouer, A.; Benmounah, A.; Sekkiou, H.; Kheribet, R.; Safi, Brahim
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    Physico-chemical and rheological characterization of water-based mud in the presence of polymers
    (Springer, 2015) Safi, Brahim; Zarouri, S.; Chabane-Chaouache, R.; Saidi, M.; Benmounah, A.
    Under the geological conditions of wells and during the drilling operation, some of the water-based mud compositions are sometimes not effective for the drilling success of the oil wells (case of the oil wells in the south Algeria). For this, the aim of this study is to examine the influence of polymer types [carboxymethylcellulose (CMC) and polyanionic cellulose (PAC)] on the physico-chemical and rheological properties of water-based drilling muds. A mud samples were prepared with a polymers (PAC or CMC) according to mud formulations currently used in the wells drilling. The properties are controlled at such values that the mud provides optimum performance. For this purpose, the physico-chemical (pH, Pb: mud alkalinity) and rheological (apparent viscosity, yield point, and behavior rheological) were measured out on the studied muds. According to the obtained results, the rheological characteristics of studied muds (yield point and plastic viscosity) were clearly improved in the polymers presence. However, it should be noted that the PAC has given the better results compared to the CMC at a concentration of 8 g/l. By against in the temperature presence (hot rolling), the CMC is a good controller agent of mud filtrate compared to those containing the PAC for the same concentration