813.01 Description. This item shall consist of a dampproofing
or plain waterproofing composed of a primer coat fo llowed by one or more moppings of an asphalt coating according to these specifications and at locations shown on the plans. Other dampproofing systems may be used when approved by t he Engineer.
813.02 Materials. Asphalt materials shall conform to the
requirements of Section 815.
813.03 Construction Requirements. The surface to which the
dampproofing coating is to be applied shall be clea ned of dirt and foreign material, and shall be dry. Dampproofing shall not be applied in wet weather or when the atmospheric temperature is below 50°F (10°C). Priming of concrete, steel, or other surfaces shall be accomplished immediately before applying the first mopping. Additional moppings, when required by the plans, sh all be applied soon after the preceding mopping has cooled. The amount of asphalt in each mopping shall be not less than 2½ gallons per 100 square feet (1 L/sq m). Care sh all be taken to 828 avoid overheating the asphalt. The temperature of the asphalt at the time of application shall be in the range recommend ed by the manufacturer. Asphalt heating kettles shall be equ ipped with armored or electronic sensing, digital readout ther mometers so placed that the temperature of the asphalt can read ily be determined at any time. Care shall be taken to confine mopping only to the areas to be waterproofed and to prevent discoloration of other parts of the structure from dripping or spreading of the asphalt materials.
813.04 Method of Measurement. Dampproofing will be
measured by the square foot (square meter). The ar ea for measurement will be the entire finished area actual ly covered, but shall not exceed the limits shown on the plans or a uthorized by the Engineer.
813.05 Basis of Payment. Work completed and accepted and
measured as provided above will be paid for at the contract unit price bid per square foot (square meter) for Damppr oofing, which price shall be full compensation for furnishing mat erials; and for all labor, equipment, tools, and incidentals necessary to complete the work. Payment will be made under: Pay Item Pay Unit Dampproofing Square Foot (Square Meter) SECTION 814 VACANT
DAMPPROOFING in other states
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