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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: Slump Loss and Rheology of Superplasticized Mortar and Concrete With Different Polysaccharide Syrups
Author(s): G. Mantegazza and E. Alberti
Publication: Special Publication
Appears on pages(s): 105-120
Keywords: admixtures; compressive strength; concretes; flexural strength; mortars (material); polysaccharides; rheological properties; setting (hardening); slump; superplasticizers; workability; Materials Research
Abstract:The rheological properties of fresh mortar and concrete were studied with five types of polysaccharide syrup added to either naphthalene or melamine sulfonate-based superplasticizer. The effects of the binary admixture system (superplasticizer and syrup) on the physicomechanical properties of the cementitious system, based on two types of cement (portland and pozzolan), were studied. The properties, studied at 25 and 40 C, were slump, loss of workability, setting time, and compressive and flexural strength. For one type of syrup added to the superplasticizer, synergistic effects were observed. In particular, it was demonstrated that, at 40 C, it is possible to increase the slump and reduce loss of workability using an admixture based on naphthalene sulfonate, plus Syrup G62 and melamine sulfonate, plus Syrup G62, compared to normal superplasticizer-retarding admixtures.
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