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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: Laboratory Evaluation of the Freezing and Thawing Durability of Marine Limestone coarse aggregate in concrete
Author(s): D. S. Lane and R. C. Meininger
Publication: Special Publication
Appears on pages(s): 1311-1324
Keywords: adsorption; aggregates; air-entrained concretes; limestone; coarse aggregates; concrete durability; freeze-thaw durability; saturation; Materials Research
Abstract:Air-entrained concretes were subjected to extended freezing-thawing tests to determine the durability of three porous marine limestone coarse aggregates. Control concretes were made with a nonporous limestone. Prior to mixing the concrete, the coarse aggregates were soaked for 24 hr. After initial curing, the specimens were placed in a standard moist room for 13 days until freezing tests began at 14 days' age. Weight change, length change, and dynamic modulus of elasticity were monitored throughout the test. Specimens exposed to the freezing-in-air procedure were subjected to 1000 freezing-thawing cycles without showing significant deterioration. Except for the control group, all specimens subjected to the freezing-in-water procedure began to deteriorate between 250 and 350 cycles, as indicated by increasing length and decreasing modulus of elasticity. Increasing weight of the water-frozen specimens during the first 300 cycles was attributed to water absorption. Calculations suggest that the coarse aggregate in specimens frozen in water had reached 80 to 95 percent saturation when deterioration began. These results emphasize the critical role played by moisture content in determining the freezing-thawing durability of coarse aggregates and the need to develop better methods to evaluate saturation levels during testing with respect to in-place conditions.
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