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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 Contents and Air-Void Concretes
Characteristics in Low-Slump Dense
Author(s): David Whiting
Publication: Journal Proceedings
Appears on pages(s): 716-723
Keywords: air-entrained concretes; air-entraining agents; air entrainment; air meters; fresh concretes; hardened concretes; resurfacing; voids.
Abstract:Air-void systems of low slump, low water-cement ratio concretes (LSDC) used for "dense" concrete overlays were evaluated. Dosages of neutralized vinsol resin and alkyl-benzyl sulfonate-based air-entraining agents needed to achieve specified air contents were approximately ten times those used in conventional concrete mixtures. For two other types of agents (a tall-oil derivative and an alkali-stabilized wood resin), specified air contents could not be achieved even at dosage rates approaching S percent by weight of cement. Once the specified air contents had been achieved in the fresh concrete, air content and air-void characteristics in the hardened concrete were satisfactory. Entrapped air contents ranged from I to 2 percent and could be reduced to below 1 percent if prolonged internal vibration was employed.
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