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- W1962946089 abstract "The Greene County, Iowa overlay project, completed in October 1973, was inspected on October 16 & 17, 1978 after five years of service. The 33 fibrous concrete sections, four continuously reinforced concrete pavement (CRCP) sections, two mesh reinforced and two plain concrete sections with doweled reinforcement were rated relative to each other on a scale of 0 to 100. The rating was conducted by the original members of the Project Planning Committee, Iowa DOT, Iowa Counties, Federal Highway Administration, University of Illinois and industry representatives . In all , there were 23 representatives who rated this project . The 23 values were then averaged to provide a final rating number for each section. The highest panel rating (90) was assigned to the 5-inch thick, deformed bar reinforced portland cement concrete (PCC) sections; an 86 to a 3-inch thick, 160 lb. of fiber and 600 lb. of cement on a partial bonded surface; an 84 to the 4-inch CRC with elastic joints (bonded); and an 84 to a 4-inch mesh reinforced section. One of the major factors influencing performance appears to be the thickness. In the fibrous concrete overlays, the greatest influence appears to be the fiber content. Overlay sections containing 160 lb/yd³ of fiber are, in almost all cases, outperforming those containing 60 or 100 lb/yd³. It is obvious at this time that the 3-inch thick fibrous concrete overlays are, in general, outperforming the 2-inch thick sections. The performance of the fibrous concrete overlays appears to be favorably influenced by: (1) The use of higher aspect ratio fiber (0.025 x 2.5 in.) versus (0.010 x 0.022 x 1.0 in.); and (2) The use of a lower cement content ( 600 versus 750 lb/yd³). However, these trends are less well defined and the improvements in overlay performance attributed to high aspect ratio fibers and low cement contents are not large and may prove to be insignificant." @default.
- W1962946089 created "2016-06-24" @default.
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- W1962946089 date "1978-12-05" @default.
- W1962946089 modified "2023-09-27" @default.
- W1962946089 title "Fibrous P.C. Concrete Overlay Research Greene County, Iowa" @default.
- W1962946089 hasPublicationYear "1978" @default.
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