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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: Efficacy of Ultrasonic Pulse Velocity Testing to Assess Sulfate-Degraded Concrete
Author(s): Julie Ann Hartell, Andrew J. Boyd, and Patrice Rivard
Publication: Special Publication
Appears on pages(s): 1-16
Keywords: Durability, sulfate attack, ultrasonic pulse velocity, condition assessment.
Abstract:The phenomena involving hydrated cement paste and a source of sulfate anion have been extensively studied over the last four decades. The present publication provides an overview of past external sulfate attack studies along with current views on the accuracy of standard methods to evaluate the performance of a concrete mixture in service; illustrating the need to find other means of laboratory testing based on “real” exposure conditions representative of sulfate reaction kinetics encountered in field structures. This study evaluates the efficacy of stresswave propagation testing to detect concrete microstructural disparities related to sulfate-induced damage. While respecting traditional means of inducing an external sulfate attack in the laboratory (complete immersion in a 5%
sodium sulfate solution), the experimental study proposed a different methodology for evaluating the extent of sulfate degraded concrete in the laboratory. Over a 2-year exposure term, the extent of degradation of various specimen types, replicating transport mechanisms reminiscent of those seen in the field, were evaluated using ultrasonic pulse velocity. Through statistical analysis, the results discussed demonstrated that the test procedures conducted were reliable for assessing the changes in behaviour observed.
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