Publications Internationales
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Item 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.Item Study of Physico Mechanical and Rheological Behavior of Self Compacting Concrete" (SCC), with and without Fibers under the Action of Various Types of Superplasticizers(2012) Samar, Madjid; Benmounah, A.; Kheribet, Rabia; Saidi, Mohammed; Safi, BrahimItem Optimization of the process of cooking and drying of brick(isjaee, 2010) Saidi, Mohammed; Hamiane, Messaoud; Benmounah, A.; Safi, BrahimThe 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 efficiencyItem Development of an Antireflection Layer Using a LDS Based on β-SiC Nanoparticles(Springer, 2020) Benfadel, K.; Kaci, S.; Hamidouche, F.; Keffous, A.; Benmounah, A.; Manseri, A.; Achacha, S.The main objective of this work is to use β-SiC (also called 3C-SiC) silicon carbide nanoparticles to formulate composite layer for wavelength conversion. Silicon Carbide nanopowders (npβ-SiC) were successfully synthesized by sol-gel method and followed by carbothermal reduction. Composite thin layers based on np-β-SiC incorporated into polyvinyl alcohol, (PVA) as matrix, where prepared. We have investigated the composite layers deposited silicon solar cell as a luminescent down shifting layer (LDS) to convert UV wavelengths. The texturation of the substrates by making pyramids, pyramids with nanowires was investigated in order to decrease the surface reflectance of silicon surface. An improvement in the spectral response of the obtained solar cells was very remarkable. In order to confirm this property, electro-optical characterizations were carried out on the solar cell with the developed composite layer and also on that without β-SiC/PVA coating, as reference. The morphological quality of the used substrates was examined by SEM images. EQE measurements have shown a noticeable increase showing the ability to use the prepared composite layer as lightweight encapsulation material for photovoltaic devicesItem Investigation on improving properties of polypropylene-based nanocomposites by employing Algerian nanoclay(Springer link, 2020) Triaki, M.; Benmounah, A.; Zenati, A.A study was conducted to evaluate the influence of nanoclay on the final properties of polypropylene-based nanocomposites. Polypropylene/nanoclay nanocomposites with a varied content of nanoclayranging from 0 wt% to 11 wt% were prepared using a co-rotating twin screw extruder. The polypropylene-grafted maleic anhydride (PP-g-MA) was used as a compatibilizer to improve the dispersibility of the nanoclay. Properties and characteristics of nanoclay and PP/PP-g-MA/nanoclay nanocomposites were investigated by means of laser diffraction spectroscopy, Fourier-transform infrared spectroscopy, X-ray diffractometer, ZWICK/ROELL testing machine, capillary rheometer, thermogravimetry/differential scanning calorimetry and scanning electron microscopy. The results of morphological characterization indicated that the dispersion and the distribution of the charges are the essential characteristics likely to influence the mechanical, rheological, thermal and morphological properties of the nanocomposites. Thus, the results manifested that the incorporation of a small amount of nanoclay had a significant effect on the final properties of nanocompositesItem Properties of SiC-Based Luminescent Composite Thin Film As Light-Harvesting Material(Springer, 2020) Benfadel, K.; Kaci, S.; Talbi, L.; Keffous, A.; Benmounah, A.; Bozetine, I.; Boukezzata, A.; Rahmoune, R.; Ouadah, Y.; Guerbous, L.; Kermad, A.; Achacha, S.; Mahmoudi, B.; Cheraga, H.In this study, we present the use of SiC/PVA composite thin films as downshifting layers (LDS) in order to improve the photoelectrical parameters of a Si-based solar cell. We showed that the adding of these layers increases the short circuit current density. This increase could surely lead to the improvement of the power conversion efficiency since the two parameters are relied. The J–V characterizations of the as made c-Si solar cell measured under white light showed an enhancement of the photocurrent after coating the c-Si solar cell with SiC-based LDSs. The same behavior was noticed upon exposure to UV light illumination which depended strongly on the elaboration conditions of the luminescent porous SiC particles. A decrease in total reflectance of the c-Si solar cell coated with SiC based LDS was also observed. Spectral Response measurements have shown significant enhancement where the solar cells have poor optical response.Item Mechanical Characterization and Optimum Design of Wound Glass-Fiber-Reinforced Polymer Pipes Based on the Winding Angle and the Number of Plies(Springer Nature SharedIt Initiative, 2020) Baali, Brahim; Benmounah, A.; RokbItem Evaluation of the thixotropy of oil-well cements used for cementing lost circulation zones : effect of plaster and blast furnace slag(2010) Bouziani, T.; Makhloufi, Z.; Benmounah, A.; Bédérina, M.Cementing of oil and gas wells can be a very delicate operation. Among the concerns of service companies, during this operation are the nature and conditions of the formations in well. This is the case of cementing operations in southern Algeria, specifically on the fields of In-Amen, where the formations in lost zones are naturally weak and highly permeable. In these areas, drilling fluids (muds and cements) pumped will be, completely or partially lost, what we call" lost circulation". Thixotropic cements are useful to overcome lost circulation problems. They are characterized by a special rheological behavior, allowing it to plug lost zones when they are pumpedItem Formulation and Physico-Mechanical characterization of a Self-Compacting concrete containing seashells as an addition material(2015) Safi, Brahim; Saidi, Mohammed; Benmounah, A.; Mitterpach, JozefItem Effect of the iron concentration on the properties of an aluminosilicate glass used for storage of radioactive waste(PARLAR SCIENTIFIC PUBLICATIONS (PSP), 2016) Moudir, D.; Ikhaddalene, Soumia; Kamel, N.; Benmounah, A.; Zibouche, Fatima; Mouheb, Y.; Aouchiche, F.