SECTION 510 - REPAIR OF CONCRETE PAVEMENT
510.01 Description. This work consists of surface preparation, including cleaning, and
placement of polymer concrete in spalled ar eas of concrete pavement, or other areas directed by the Engineer, in accordance with these specifications and in reasonably close conformity with the lines and grades of the existing pavement.
510.02 Materials. The polymer concrete shall be one of the approved materials listed in
the MDOT’s “Approved Products List” un der the List of Approved Rapid Setting Commercial Grouts and Patching Compounds for use in the repair of punch-outs (spall repairs) in concrete pavements.
510.03 Construction Requirements.
510.03.1 Surface Preparation. All spall areas one inch in diameter or larger shall be
cleaned and prepared for receiving the polymer concrete. The Contractor shall remove all loose, cracked or deteriorated concrete from the spalled areas using a mason or shop hammer and if necessary, a jack hammer not la rger than 20 pounds. Spalled areas shall first be sand blasted, or other method approved by the Engineer, until concrete exhibits an obvious color change, and then air blasted to remove all loose debris.
510.03.2 Manufacturing and Placing of Polymer Concrete . Spalled areas must be
completely dry prior to prim ing and placement of polymer co ncrete. Priming resin shall be mixed according to the manufacturer's published recommendations. The entire area of spalls plus an additional two inches around th e circumference of the area shall be primed using a brush. Priming resin may be allowed to gel prior to placing resin/aggregate. The resin shall be mixed with the aggregat e in accordance with the manufacturer's recommendation until the aggregate is thoroughly wetted with the resin. The Contractor shall first fill, tamp, trowel and screed the spalled area parallel to the centerline of the roadway, then apply a surface coat of dry graded aggregate and tamp into wetted aggregate to provide skid resistance. The polymer concrete shall be allowed to cure for two (2) hours prior to opening the area to traffic.
510.04 Method of Measurement. Graded aggregate and resin used in polymer concrete
pavement repair of spalled areas will be meas ured by the cubic foot of aggregate and by
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