Section 508 Section 508
508.05 Basis of Payment. Silicone sealed joints will be paid for at the contract unit price
per linear foot, which shall be full compensation for satisfactorily completing the work. The price for this work shall include the cost of continuous maintenance of traffic and protective services as required by the Department 's Traffic Control Plan. This shall include all required individual traffic control devices. Payment will be made under: 508-A: Silicone Sealed Joints - per linear foot 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 receiv ing 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 approve d 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 the gallon for resin. Catalyst will not be measured for separate payment.
510.05 Basis of Payment. Graded aggregate and resin, m easured as provided above, will
be paid for at the contract unit price per cubic foot of aggregate and gallon of resin, which price shall be full compensation for all surface preparation, cleaning, priming, placing of polymer concrete, disposal of all surplus material; and for all materials, equipment, tools, labor and incidentals necessa ry to complete the work. Payment will be made under: 510-A: Graded Aggregate - per cubic foot 510-B: Resin - per gallon SECTION 511 - PREROLLING EXISTING PAVEMENT
511.01 Description . This work consists of prerolling existing pavement to determine
construction procedures required under other provisions of the contract.
511.02 Blank .
511.03 Construction Requirements .
511.03.1 Equipment . The roller shall consist of a si ngle-axle trailer-type roller or a
loaded truck having a single rear axle. The ax le shall be loaded to a gross weight equal to or greater than the maximum legal load for a tandem axle on the highway on which the project is located but not to exceed 25 tons , and the Contractor sh all provide the means necessary for the Engineer to determine that these weight requirements are being met. The wheels shall be equipped with pneumatic tires capable of being inflated to a minimum inflation pressure of 100 psi. Tires may contain liquid if the Contractor so desires. The Contractor shall provide the Engineer with verification of gross axle weight and tire pressures. If a trailer type roller is used, it shall be towed by a rubber tired prime mover capable of maintaining a speed of two miles per hour. The prime mover with roller attached shall be capable of executing a 180° turn within a width of 30 feet.
511.03.2 Protection . Rolling shall be conducted so as to avoid damage to existing
structures and features designated to remain. Damage to such structures and features shall be repaired or the items replaced, in kind, at no additional cost to the State. The loaded roller shall not encroach upon bridge end pavement or, in the absence of bridge end pavement, within 20 feet, or greater distance when directed, of bridge abutments except under specific authority granted to cross a bridge. Live loadings on any bridge shall not exceed the statutory loading permitted on the bridge except the Department may consider an overload permit for individual cases. All pertinent information, including proposed frequency and size of loadings and type and exact location of bridges shall be furnished the Department in order that a comprehensive study may be made.