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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: Properties of Recycled Aggregate Concretes as Affected by Admixtures in Original Concretes
Author(s): Torben C. Hansen and Soren E. Hedegkd
Publication: Journal Proceedings
Appears on pages(s): 21-26
Keywords: mixtures; accelerating agents; aggregates; air-entraining agents; air entrainment;compressive strength; corrosion; deicers; crushed concrete;reinforcing steels; retardants; setting (hardening).
Abstract:Experimental results are reported that show that addition of a plasticizing, an air entraining, a retarding, and an acclerating admixture to original concretes had little or no effect on the properties of new concretes produced from recycled aggregates obtained by the crushing of original concretes. When four percent of water-free calcium cholride, corresponding to 2.56percent of soluble chloride ion by the weight of cement, was added to an original concrete to simulate the accumulated deicing salts, the chloride content of a correled concrete exceeded current ACI 201.2R-77 limits for concrete prior to service exposure.
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