517.01 517-1 SECTION 517 WATERPROOFING DESCRIPTION
517.01 This work consists of waterproofing concrete surfaces per these specifications and in
conformity with the plans or as directed. MATERIALS
517.02 Materials for waterproofing shall conform to the following:
Item ASTM Designation Use Asphalt Primer D41 Primer under asphalt mop coats *Asphalt Mop Coat D449 Mop coats with or without membrane Woven Cotton Fabric D173 With asphalt membrane * Type I is for use below ground and shall be heated to a temperature of between 225 and 275 °F . Type II is for use above ground and shall be heated to a temperature of between 275 and 325 °F . Type II shall be used unless otherwise specified. For hot application, materials for waterproofing shall be heated to a temperature of between 175 and 225 °F in a heating kettle or tank constructed as a double boiler , with a space between the inner and outer shells filled with oil, asphalt, or other material for heat transfer and for positive temperature control. Heating kettles shall be equipped with thermometers and the material shall be stirred continuously to avoid overheating. CONSTRUCTION REQUIREMENTS
517.03 All concrete surfaces to be waterproofed shall be free of loose material and dirt and
shall be reasonably smooth and free of projections or holes. Waterproofing shall not be started without approval in wet weather or when the temperature is below 35 °F . The waterproofing shall in all cases be started at the low point of the surface to be treated so that water will run over and not against or along the laps. Beginning at the low point of the properly prepared surface to be waterproofed, a priming coat shall be brushed or sprayed on the surface to penetrate and prepare it for the first mop coat of hot asphalt coating. After the primer has cured, a section about 20 inches wide and the full length of the surface shall be mopped with the hot asphalt. The first strip of half -width fabric shall be rolled into the mop coat immediately after it is placed. The first strip and all following strips shall be rolled into place to eliminate air bubbles and obtain close conformity with the surface being treated. The first strip and an adjacent section of the surface of a width equal to slightly more than half 517.04 517-2 the width of fabric being used, shall then be mopped with hot asphalt and a second strip shall then be rolled into it. The second strip shall completely cover the first strip. The second strip and an adjacent surface of concrete shall then be mopped with hot asphalt and a third strip of fabric “shingled” on. The third strip shall lap the first strip by at least 2 inches. This process shall be continued until the entire surface to be treated is covered and each strip of fabric shall lap at least 2 inches over the next to last strip. The entire surface shall then be given a final mopping of hot asphalt. The completed waterproofing shall consist of a firmly bonded membrane composed of two layers of fabric and three moppings of asphalt, together with the required prime coat. Each layer must be separated from the concrete surface or other layers of fabric by an intervening mop coat. The mopping on the concrete shall cover the surface so that no gray spots appear , and on the fabric, it shall be sufficiently heavy to completely conceal the weave. At least 12 gallons of asphalt shall be used for each 100 square feet of horizontal surface and at least 15 gallons for each 100 square feet of vertical surface for each mop coat. The work sh all be so regulated that, at the close of a day’s work, all fabric that has been laid shall have received the final mopping of asphalt and the edges of all laps shall be thoroughly sealed down. Suitable provisions shall be made to prevent water from getting between the waterproofing and waterproofed surface at the edges of the membrane and at any point where it is punctured by such appurtenances as drains or pipes. METHOD OF MEASUREMENT
517.04 The accepted quantities of waterproofing will be measured by the square yard based
on the surface area waterproofed. BASIS OF PAYMENT
517.05 The accepted quantities of waterproofing will be paid for at the contract unit price
per square yard. Payment will be made under: Pay Item Pay Unit Waterproofing (Asphalt) Square Yard 518.01 518-1 SECTION 518 WATERSTOPS AND EXPANSION JOINTS DESCRIPTION
518.01 This work consists of furnishing and installing waterstops, expansion joints, and end dams
of the sizes and types required per these specifications and in conformity with the details shown on the plans, or as directed. This work consists of furnishing and placing a Polyester Concrete End Dam system , which includes Polyester -based P olymer Concrete (PPC) and High -Molecular -Weight Methacrylate (HMWM ) resin primer. The system shall be used for Portland Cement Concrete blockouts (PCC ) of bridge expansion devices on the concrete bridge deck, abutment backwalls, and approach slabs as shown on the plans. MATERIALS
518.02 Waterstops . Waterstops shall be manufactured either from neoprene or polyvinyl
chloride (PVC) meeting the requirements described in subsection 705.10. The Contractor will have the option of furnishing either material unless otherwise specified. The Contractor shall submit a certificate of compliance for each type of waterstop proposed for use on the project to the Engineer.
518.03 Asphaltic Expansion Devices . This device consists of an expansion joint system
composed of a blended polymer modified asphalt and special aggregate per these specifications and in conformity with the details shown on the plans or established. The joint system shall be installed in a prepared expansion joint blockout and shall be designed for a rated joint movement of 0 to 2 inches including rotations. The polymer modified asphalt, aggregate, backer rod, bridging plate, and joint binder shall conform to recommendations of the manufacturer of the approved joint system installed. Approved joint systems shall be those shown on the plans. The Contractor shall furnish manufacturer's certification that all materials furnished have been pre-tested and meet the requirements set forth in the specifications and conform to the materials listed in the latest product literature. No substitution of materials will be permitted.
518.04 Elastomeric Expansion Devices . This device consists of an elastomeric expansion joint
device and curb cover plates as shown on the plans and per these specifications. The expansion joint device shall seal the deck surface as indicated on the plans and prevent water from seeping through the superstructure slab. Seeping of water through the joint will be cause for rejection of the expansion device. The Contractor shall state at the Pre- construction Conference the specific manufacturer and model number of the device the Contractor int ends to furnish and install. The device shall consist of a continuous pre -molded elastomeric expansion joint seal, anchors and steel extrusions as shown on the plans, required by the manufacturer, or specified for attaching the elastomeric expansion joint seal to the steel armor. The expansion device shall have a rated movement of 0 to 4 inches including rotations.