Publications Internationales

Permanent URI for this collectionhttps://dspace.univ-boumerdes.dz/handle/123456789/13

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Author: search.filters.author.Benmounah, A.Subject: search.filters.subject.Rheology

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Now showing 1 - 7 of 7
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    Valorization of mixed metal hydroxide on Algerian Na-Bentonitesuspensions: Application to water-based drilling fluid
    (Elsevier, 2020) Akkouche, A.; Benmounah, A.; Gueciouer, A.; Chalah, K.
    The use of mixed metal hydroxide tri-cationic (Li+,Mg+2,Al+3) in water based drilling fluids brought to thebirth of a new air and perspective to improve the using of Bentonitic suspension as viscosifier in drillingfluids.The aim of this work is to study the possibility of using mixed metal hydroxide and see his effect atdifferent percent (5%, 10%, 15% and 20% by Wt of Bentonite) on the rheological behavior and colloidalproperties of Algerian Na-Bentonite suspension (30 kg/m3).Rheological tests and Zeta Potential measurements have been performed for each prepared suspension.The results show that the adding of MMH on Algerian Na-Bentonite increases the yield stress to 1.39 Pasat 20% MMH, however a stable suspension was observed 41 mV of Zeta Potential measurement at 10%MMH with yield stress of 1.17 Pas.
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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
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    Rheological and electrokinetic properties of carboxymethylcellulose-water dispersions in the presence of salts
    (2012) Benyounes, Khaled; Benmounah, A.
    The purpose of this work is to investigate the effect of the addition of salts in the form of calcium chloride, sodium chloride and potassium chloride on the rheological and electrokinetic properties of diluted sodium carboxymethylcellulose (Na-CMC) dispersions (0.50%). The rheological data of a water-CMC-salt system were obtained using coaxial cylinder viscometer covering a wide range of shear rate (0 to 600 s-1). Ostwald–de Waele power law was used for fitting flow curves of various samples. The presence of salts in CMC aqueous solutions leads to the reduction of the consistency index and the increase of flow index as salinity increases. When the concentration of salts is greater than 3%, the rheological parameters of CMC solutions in saline medium are quasi stable. The electrokinetic measurements show an increase of the zeta potential of CMC dispersions when the concentration of salts in solution increases. Calcium chloride caused the greatest increase in zeta potential. Excluding the monovalent cations, the divalent cation is able to reverse the sign of the zeta potential from negative to positive
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    Formulation and characterization of self compacting concrete with silica fume
    (Academic journals, 2013) Kennouche, S.; Zerizer, A.; Benmounah, A.; Hami, Brahim; Mahdad, M.; Benouali, H.; Bedjou, S.
    Self-compacting concrete (SCC) was elaborated using local materials and silica fume (SF) as admixture in 15% of cement quantity, two different Portland cements (PC) and two different superplasticizer that the chemical nature is polycarboxylate and plynaphtalene, the aggregates used are (AG 3/8 mm, AG 8/15 mm), coarse and fine sand (SC, SF) witch fineness modulus 3.2 and 1 in the order. The dosage of the different superplasticizer used is chosen after experimental spreading tests of each self compacting concrete formulation. Results of fresh concrete tests executed, as L-box and segregation resistance are on concordance whit values recommended by the French association of civil engendering. Also the mechanical characterization was conducted by compressive strength and splitting compression testing procedure, results values are in the range higher than 20 Mpa at the seven day by the compressive test for the all compositions, and the highest value was 40.93 MPa at the 28 day bay compressive test of the fourth’s formulation specimens, the values of splitting compressive tests of al formulation specimens at 7, 14 and 28 days, was situated between 2.01 and 4.40 MPa. In order to determine the superplasticizer saturation assay in of cement pasts used in self compacting concrete, the stady was completed by a rheological stady with a variable velocity gradient, so as to estimate the quantity of saturation assay of superplasticizer and the formulation, also the flow models of cement paste
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    Effects of alkaline and alkaline-earth ions on the rheological behavior and zetametric study of two cement pastes (artificial cement portland-CEMI and cement resistant to the sulfates-CRS) with the polynaphthalene sulfonate (PNS)
    (2012) Kheribet, R.; Samar, M.; Benmounah, A.; Safi, Brahim; Said, M.
    The use of admixtures which tends to be generalized in the formulation of self-compacting concrete (SCC), requires taking into account the chemical co mposition of cement, particularly its content of SO 3 , which can inhibit or restrain the effect of these a dmixtures (superplasticizers). For more information of the compatibility problem of cement-superplasticize r, the rheological tests with a rheometer-AR2000 and measurements of zeta potential with a Zêtasiser -2000 were used in this study. In order to understand this phenomenon due to the presence of S O 3 in cement, we propose to evaluate the action of alkaline and alkaline-earth ions, incorporating different types of additions (K + , Na + , and Ca 2+ ) to the cement pastes. To achieve this, our work will conce rn the study of rheological properties and physical characteristics of the pastes obtained using two ty pes of cement (C1: Cement Resistant to the Sulfates (CRS) and C2: CEMI). This experiment will focus on two reports: Water/Cement ( W/C) = 0.30 for which the polynaphthalene sulfonate (PNS) is used as supe rplasticizer and W/C = 0.50 (without superplasticizer). The results show that the presen ce of sulfate leads to different rheological behavi ors which are function of sulfates and the cements used