Author(s):
H.L. Furr, L.L. Ingram, W.M. Moore, G. Swift
Publication Date
December 1972
Abstract
Reports on 3 separate phases of a study of bridge deck deterioration are summarized. Full details are not given in this report, but they are given in the 10 reports which are referred to in the body. The 3 phases, diagnosis, treatment, and repair deal with the problems of scaling, spalling, and delamination.|A detector was developed which maps the delaminated area of concrete on a bridge deck. It is an electronically controlled instrument which interprets acoustical signals taken from the concrete as the instrument cart rolls along the bridge. A prototype was constructed and conditioned for field service.|Materials for surface treatment of concrete bridge decks were tested as deterrents to freeze-thaw scaling damage. The most effective materials were identified, and methods and schedules of applications were developed. Air entrained concrete was found to be the most resistant to freeze-thaw scaling, and a mixture of linseed oil and kerosene was found to be effective in combating freeze-thaw damage at a relatively low cost. Materials and methods for repairing decks with 1 1/2 in. to 2 in. thick concrete overlays were developed, tested, and proved in field installations. It was found that a 2 in. thick plain concrete overlay bonded with grout to a well prepared base provides a durable overlay which adds to the stiffness of the slab and provides a good riding surface.|Materials and methods for structural repair of cracked or fractured concrete with epoxy resin was studied in the laboratory. Information and techniques developed from the laboratory investigation was demonstrated to Texas Highway Department personnel in four Districts.
Report Number:
130-11F
Keywords:
acoustical velocity, Bond Strength, bridge decks, concrete, concrete deterioration, crack repair, deck overlay, deck repair, Delamination, delamination detector, direct tensile test, epoxy injection, epoxy resin, latex modified concrete, scaling, Schmidt Rebound Hammer, spelling, steel fiber reinforced concrete, Windsor Probe
Link(s):
Document/Product
http://tti.tamu.edu/documents/130-11F.pdf
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