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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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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: The Influence of Mineral Additions on the Rheology of Self-Compacting Concrete
Author(s): V. Corinaldesi and G. Moriconi
Publication: Special Publication
Appears on pages(s): 227-240
Keywords: acrylic-based superplasticizer; cement paste rheology; rubble powder; self-compacting concrete
Abstract:The development of concrete, which need not be vibrated, and which consolidates under its own weight, is a challenge to the building industry. In order to achieve this behavior, fresh concrete must show high fluidity and good cohesiveness. For the purpose of evaluating these properties, some concretes were prepared with a water to cement ratio of 0.45 by alternatively adding two different kinds of acrylic-based superplasticizer to the mixture at a dosage of about 1 % by weight of cement. Either fly ash or limestone powder or rubble powder (that is a powder obtainded from the recycling process of rubble from building demolition) were used as mineral admixture, in order to ensure adequate theological properties to the self-compacting concretes in the absence of viscosity modifying agents. Preliminary rheological tests were carried out on pastes in which cement was partially replaced by these fine materials. The fresh concrete properties were evaluated through both the slump flow and the L-box tests. The segregation resistance was also determined. Compressive strength was also measured on hardened concretes after 1, 3, 7 and 28 days of wet curing.
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