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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: A Look at Type K Shrinkage-Compensating Cement Production and Specifications
Author(s): George C. Hoff and Katharine Mather
Publication: Special Publication
Appears on pages(s): 153-180
Keywords: air entrainment; compressive strength; density (mass/volume); drying shrinkage; expansion; expansive cement, Type K; fineness; heat of hydration; manufacturing; shrinkage-compensating cements; slump tests; specifications; x-ray diffraction .
Abstract:Samples of Type K shrinkage-compensating cement from all 17 mills producing that cement in 1974 were obtained and evaluated for compliance with a proposed specification for these cements. The cements were also evaluated for specific gravity, fineness, heat of hydration, and expansion and drying shrinkage in mortars. Concretes were also made with the cements and evaluated for air content, slump, compressive strength, expansion, and drying shrinkage. In general most cements had little trouble meeting the specification requirements although a few cements had difficulty meeting the restrained-expansion requi rements. The application of the proposed specification called attention to several shortcomings in the specification. Both concretes and mortars made with Type K expansive cements generally had higher compressive strengths than comparably proportioned Type II cement mixtures. Slumps of Type K cement concrete were generally less than the Type II cement control mixture. Observations of air contents in both mortar and concrete suggest that some compatibility problems between certain individual cements and air-entraining agents may exist. The data indicate that the use of Type K cements in a wide variety of different applications should pose no extraordinary problems.
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