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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: Durability Predictions From Rate of Diffusion Testing of Normal Portland Cement, Fly Ash, and Sag Concrete
Author(s): K.E. Philipose, R. F. Feldman, and J. J. Beaudoin
Publication: Special Publication
Appears on pages(s): 335-354
Keywords: diffusion; durability; fly ash; ionic ingress; portland cements; slag cements; waste treatment; Materials Research
Abstract:A waste repository for the underground disposal of low-level radioactive waste, called IRUS (Intrusion Resistant Underground Structure), is planned at the Chalk River Nuclear Laboratories. It relies greatly on the durability of concrete for a minimum of 500 years of service life. A research program based on laboratory testing to design a durable concrete and predict its useful engineered service life is in progress. The durability of concrete depends on its resistance to deterioration from both internal and external causes. Since the rate of degradation depends to a major extent on the rate of ingress of aggressive ions into concrete, laboratory testing is in progress to establish the diffusion rates of chlorides and sulfate ions. A total of 1000 concrete specimens and 500 paste specimens are being exposed at 22 and 45 C to 25 different combinations of corrosive agents, including Co2. Procedures to measure the ionic penetration profile and to determine the factors controlling diffusion of ions in the various concretes have been developed. The paper presents initial results from the research program and the longevity predictions to qualify concretes for the IRUS waste repository, based on 16 months of diffusion testing on laboratory specimens.
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