Concrete overlays have been used for pavement and bridge-deck rehabilitation for many years. The mechanical properties and durability of several plain and fiber-reinforced concrete-overlay mixes were analyzed. Eight different concrete-overlay mix designs were investigated. The materials properties investigated were compressive and splitting tensile strength, modulus of elasticity, bond to concrete (with three different surface roughness characteristics), and durability. Freeze-thaw tests were performed to determine the durability of the concrete mixtures used. Strength and stiffness were investigated from 1, 3, 7, and 14 days. Laboratory tests on the strength and stiffness development of eight candidate concrete-overlay designs showed that high-strength concrete was appropriate for opening overlays to traffic in 24 h or less, but normal-strength concrete may be used if traffic loading may be delayed for 48 or 72 h. For larger projects, where paving continues over several days, normal-strength mixtures may be used when 48 to 72 h or more of curing can be achieved before traffic loading begins, with high-strength mixtures used for the last day's construction. All the high-strength concrete overlay-mixture designs tested appear to have satisfactory strength, stiffness, bond properties, and durability for use in bonded overlay construction. The normal-strength concrete is more economical than the high-strength concrete but develops its design properties more slowly.


    Access

    Download

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Mechanical Properties and Durability of Bonded-Concrete Overlays and Ultrathin Whitetopping Concrete


    Additional title:

    Transportation Research Record: Journal of the Transportation Research Board


    Contributors:


    Publication date :

    2003-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Durability and Mechanical Properties of High-Performance Concrete for Ultrathin Whitetopping Pavements

    National Research Council (U.S.) | British Library Conference Proceedings | 2005



    Ultrathin Whitetopping: State-of-the-Practice for Thin Concrete Overlays of Asphalt

    Mack, James W. / Hawbaker, Lon D. / Cole, Lawrence W. | Transportation Research Record | 1998


    Guidelines For Concrete Overlays of Existing Asphalt Pavements (WhiteTopping)

    Voigt, G. F. / Mack, J. W. | British Library Conference Proceedings | 1996