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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: Reduction of Crack Widths in Steel Reinforced Concrete Bridge Decks with Fiber Addition
Author(s): Anil Patnaik, Prince Baah, Perry Ricciardi, and Waseem Khalifa
Publication: Special Publication
Appears on pages(s): 1.1-1.20
Keywords: Bridge deck cracking; continuous span structural slab bridges; crack widths; epoxy coated bars; fiber reinforced concrete; load testing; deck slabs; crack resistance
Abstract:Bridge deck cracking is a common problem in the United States, and affects the durability and service life
of reinforced concrete bridges. Physical inspections of three-span structural slab bridges in Ohio revealed cracks
wider than ⅛ inch (3.2 mm). ACI 224R-01 recommends a maximum crack width of 0.007 inch (0.18 mm) for
members exposed to de-icing chemicals. The primary objective of this study was to investigate the effects of fiber
addition on crack resistance. In an attempt to minimize deck cracking, slab specimens with basalt MiniBar or
polypropylene fiber were also investigated in the test program. Slab tests revealed that the specimens with
longitudinal epoxy-coated bars developed first crack at smaller loads, exhibited wider cracks and a larger number of
cracks, and failed at smaller ultimate loads compared to the corresponding test specimens with uncoated (black)
bars. Test specimens with fiber exhibited higher cracking loads, smaller crack widths, smaller mid-span deflections
and higher ultimate failure loads compared to identical specimens without fiber. Addition of fiber to concrete with
no changes to internal steel reinforcement details is expected to reduce the severity and extent of cracking in
reinforced concrete bridge decks demonstrating that fiber addition improves crack resistance of bridge decks.
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