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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: Use of Air Entrainment to Ensure the Frost Resistance of Roller-Compacted Concrete Pavements
Author(s): Steven A. Ragan
Publication: Special Publication
Appears on pages(s): 115-130
Keywords: air entrainment; freeze-thaw durability; pavements; roller compacted concrete; Materials Research
Abstract:Roller-compacted concrete (RCC) pavements are now an economical alternative to those constructed from asphalt and conventionally placed portland cement concrete, particularly for those pavements experiencing heavy-duty, low-speed traffic. However, a major concern related to the use of RCC pavement is its frost resistance. RCC pavements can be constructed with aggregate that are not susceptible to frost, and can be cured to an appropriate degree of maturity so as to reduce the fractional volume of freezable water on saturation to limits that can be accommodated by elastic volume change and by the air-void system. However, the ability to effectively entrain proper air-void systems in RCC pavements has remained a question due to the low water contents required to place the mixtures. An investigation was conducted by the U.S. Army Engineer Waterways Experiment Station Structures Laboratory to determine if proper air-void systems can be entrained in RCC pavement mixtures proportioned with several types and dosage rates of air-entraining admixtures, and with various aggregate types and gradings. Results of the investigation indicated that air-void systems sufficient to protect critically saturated RCC pavement mixtures from deterioration due to cycles of freezing and thawing could be created in a wide range of the mixtures produced without following special mixing procedures.
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