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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Rheological Characterization of Superplasticized Cement Pastes Containing Mineral Admixtures: Consequences on Self-Compacting Concrete Design
Author(s): M. Cyr and M. Mouret
Publication: Special Publication
Appears on pages(s): 241-256
Keywords: cement pastes; fly ash; limestone filler; metakaolin; mineral admixtures; rheology; self-compacting concrete (SCC); silica fume; superplasticizers
Abstract:The aim of this paper is to characterize different organic and mineral admixtures in order to evaluate their rheological behavior in cement pastes and their potential for incorporation into self compacting concrete (SCC). The admixtures tested are five commercial superplasticizers of various generations, acting by electrostatic, steric hindrance or combined effects; and four mineral admixtures (silica fume, metakaolin, fly ash and limestone filler) commonly used as cementitious materials and selected to achieve a large range of particle size, shape and chemical compositions. Rheological tests, using a modified Couette rheometer were performed on cement pastes to characterize the flow behavior of the mixtures and their rheological properties (yield stress and apparent viscosity). The results allow to propose some justifications concerning the suitability of these materials for their use in self compacting concrete. One example is the case of silica fume, which confers specific rheological characteristics to cement pastes that could be incompatible with the properties expected for SCC.
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