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Titre: | Compatibility of Slag-Blended Cement with Polycarboxylate Ether Superplasticisers: Rheological Properties Study |
Auteur(s): | Chalah, Kaci Abdelbaki, Benaoumeur M’hamed, Mahdad Akkouche, Ali Hammas, Aghiles |
Mots-clés: | Slag-blended cement Superplasticisers Viscosity Thixotropy |
Date de publication: | 2021 |
Collection/Numéro: | JOURNAL OF MATERIALS AND ENGINEERING STRUCTURES 8 (2021);pp. 315–324 |
Résumé: | The compatibility of slag blended-cement (SBC) with superplasticisers was investigated
using rheological measurements. Accordingly, continuous flow tests and thixotropic
behaviors were studied for different ages of hydration. In this work, the slag was used in
the range of 0-40% in order to substitute the ordinary Portland cement (OPC). Two
polycarboxylates ether superplasticisers (PCEs) were used, the acrylic copolymer (PA)
and modified polycarboxylate (PC). The saturation point of each superplasticiser was
determined on pastes by rheological tests, it is 2% on amount of cement, and the
water/cement report is equal to 0.35. The investigation was carried out using a rotational
rheometer AR2000 with coaxial cylinders’ geometry. The results showed that the PC-
admixture is more efficient than the PA-admixture in OPC; the consistence was
consecutively 4.75 Pa.s and 10.45 Pa.s. In addition, the fluidizing effect of the admixtures
on cement pastes is conditioned by the presence of slag. The use of PA-admixture in SBC
improved rheological properties. However, the use of PC-admixture in SBC increased
greatly the viscosity, which involves an incompatibility, the thixotropy increment was
from 46898.9 Pa/s (F4) to 59690.1 Pa/s (F9). |
URI/URL: | http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/10873 |
Collection(s) : | Publications Nationales
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