Browsing by Author "Kheribet, Rabia"
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Item Comportement rhéologique et physico-mécanique des ciments composés (CEMII/A) en présence d'un nouvel adjuvant superplastifiant (AETERNUM-1) dans les milieux agressifs(2012) Benmounah, A.; Kheribet, Rabia; Safi, Brahim; Saidi, MohammedItem Effects of calcined halloysite nano-clay on the mechanical properties and microstructure of low-clinker cement mortar(Elsevier, 2018) Allalou, Sara; Kheribet, Rabia; Benmounah, AbdelbakiThis paper explores the effects of calcined halloysite nano-clay (CHNC) on the physico-mechanical properties and microstructure of high volume slag (HVS) cement mortar. The principal objective of this research is to constitute a low-clinker cement mortar with high mechanical properties. Ordinary Portland cement clinker blended with 70% of ground granulated blast furnace slag (GBFS) was partially substituted with CHNC in ratios of 0%, 1%, 2%, 3%, 4%, 5% and 6% by weight. The results showed that the early age and long-term mechanical strengths of the slag cement mortars were significantly improved by the presence of CHNC. The slag cement containing 5 mass % of CHNC possessed the highest improvement of the mechanical properties and microstructure of hardened cement pastes and mortars. It was suggested that the higher pozzolanic activity of CHNC particles and the nucleation of calcium hydrosilicate (C–S–H) caused the enhanced strength developmentItem Influence of nanosilica and a polycarboxylate superplasticizer on the pheological and electrokinetical properties of cement pastes(Academic Journals, 2014) Samar, Madjid; Benmounah, Abdelbaki; Safi, Brahim; Kheribet, Rabia; Saidi, MohammedThe effect of individual and combined addition of both nanosilica (NS) and polycarboxlate ether plasticizer (PCE) admixtures on cements pastes was studied. the sole incorporation of NS increased the water demand, as proved by the mini-spread flow test…Item Rheological study of sodium carboxymethylcellulose: Effect of concentration and molecular weight(Elsevier, 2022) Chalah, Kaci; Benmounah, Abdelbaki; Mahdad, M'hamed; Kheribet, RabiaThis study deals with the rheological behavior of sodium carboxymethylcellulose (Na-CMC) using a rheological analysis. The rheological properties of Na-CMC in aqueous solution, at different mass concentrations (0.7, 0.9, 1.1, 1.3 and 1.5 wt%) and types including carboxymethylcellulose high viscosity (CMC HV), medium viscosity (CMC MV) and low viscosity (CMC LV), were investigated using a large deformation rheological measurements (0–700 s−1). The rheological behavior of CMC HV and CMC MV solutions was shear-thinning without yield stress. The flow curves were modeled by Ostwald de Waele and Cross laws (R2 > 0.99). The same models were used for fitting flow curves of various samples of CMC LV suspension but we noticed shear thickening behavior. On the contrary of the CMC HV and CMC MV, and according to the power law model, the flow index of CMC LV was increased with raising in concentration. The consistency of Na-CMC solution at 0.7w.% were 0.5 × 10−3, 0.039 and 0.252 Pa·s, and at 1.5%-CMC were 0.5 × 10−3, 0.065 and 3.162 Pa·s, for respectively CMC LV, CMC MV and CMC HVItem 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, Brahim