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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: Air Contained in Superplasticized Concretes
Author(s): Giampietro Tognon and Stefano Cangiano
Publication: Journal Proceedings
Appears on pages(s): 350-354
Keywords: air-entrained concretes; air entraining agents; air entrainment; bubbles;consistency tests; formaldehyde; fresh concretes; naphthalene; plasticizers;slump tests; vebe tests; water-cement ratio; water content; vibration; workability.
Abstract:The air-entraining activity of superplasticizers based on sulfonated naph thalene formaldehyde condensates was studied in concretes made with different water-cement ratios. Results indicated that these admixtures cause air entrainment which is directly related to the workability of mixes. Nevertheless, the comparison with concretes containing an air-entraining agent showed that the air bubbles introduced by the super-plasticizers are not bound to the cement particles and are characterized by sizes two to four times as high as those due to an air-entraining agent. Also, when working with superplasticized self-leveling concretes, a vibrating, even if moderate, action is necessary to eliminate the entrained air that, because of its size, is not useful against frost action.
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