Rheology and Setting of Alkali-Activated Slag Pastes and Mortars: Effect of Organic Admixture

作者： Marta Palacios , Phillip FG Banfill , Francisca Puertas

DOI: 10.14359/19754

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摘要: The rheology of waterglass-(Na 2 O·nSiO ·mH O) and NaOH-activated slag pastes mortars depends on the nature alkaline activator used: in waterglass-activated mortars, extensive structural breakdown under shear makes Herschel-Bulkley model a better fit to down ramp flow curve, whereas such as portland-cement behaved like Bingham fluids. Admixtures were unable reduce yield stress pastes, but inclusion naphthalene derivative admixture reduced by 80%. problem undesirably short setting times for concretes could be overcome an extended mixing time, giving initial set nearly 3 hours.