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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: Fluidity Change of Cement Paste with Superplasticizer by K2SO4 and KF
Author(s): Kazuki Matsuzawa, Daiki Atarashi, Masahiro Miyauchi, and Etsuo Sakai
Publication: Special Publication
Appears on pages(s): 425-436
Keywords: polycarboxylate based superplasticizer; cement paste; fluidity; sulphate ion; fluoride ion; adsorption of superplasticizer
Abstract:The calcination temperature in cement manufacturing can be reduced by the addition of sulphate and fluoride containing compounds and it is possible that sulphate and fluoride ions elute to the suspension after calcination. This paper describes the influence of sulphate and fluoride ions on the action of polycarboxylate based superplasticizer in cement paste. When the amount of K2SO4 or KF was increased, the viscosity of the cement paste with superplasticizer increased. The amount of adsorbed superplasticizer was decreased by K2SO4 addition but increased by KF addition. The fluidity with polycarboxylate based superplasticizer containing more functional groups was less affected by K2SO4 addition. In contrast to the case of K2SO4 addition, the increase in the degree of viscosity by KF addition was not dependent on the amount of functional groups. The specific surface area increased with K2SO4 or KF addition.
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