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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: Optimization of Self-Consolidating Pastes Containing Limestone Powder and Chemical Admixtures
Author(s): J. Kwasny, M. Sonebi, and P.A.M. Basheer
Publication: Special Publication
Appears on pages(s): 115-132
Keywords: compressive strength; limestone powder; mini-slump flow; setting time; superplasticizer; viscosity-modifying admixture; volume change.
Abstract:The performance of self-consolidating pastes was optimized by studying
the effect of three mix composition parameters, limestone powder (LSP) content, dosage of superplasticizer (SP), and that of viscosity-modifying admixture (VMA), in a statistically designed experiment. Four properties of the pastes were measured: fluidity (mini-slump flow), Vicat setting times, volume change in the fresh state, and 28-day compressive strength. The optimization was preceded by the evaluation of the response surfaces of all chosen properties in the specified ranges of the three variables. The response surface results emphasized the primary and secondary effects on the properties of cement paste. The optimization indicated that pastes with properties acceptable for self-consolidating applications could be obtained with
a moderate LSP content (for example, 19.5% by mass of total powder) and low dosage of the chemical admixtures (for example, 0.64% of SP and 0.01% of VMA by mass of total powder).
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