516.01 516-1 SECTION 516 DAMPPROOFING DESCRIPTION
516.01 This work consists of dampproofing concrete surfaces per these specifications and in
conformity with the plans or as ordered. MATERIALS
516.02 Materials for dampproofing with asphalt shall conform to the requirements of
subsection 702.01. CONSTRUCTION REQUIREMENTS
516.03 Surfaces to be dampproofed shall be cured, dry and free of all frost, loose material and
dirt. The surface that is to be protected by dampproofing shall be thoroughly cleaned before the primer is applied. The surface shall then be brush or spray painted with two coats of asphalt for primer treatment at a rate of 1/8 gallon per square yard for each coat. After the primed surface has dried one application of asphalt dampproofing material shall be applied by brush, at a rate of 1/10 gallon per square yard. Care shall be taken to prevent discoloration of other parts of the structure not to be dampproofed, by the dripping or spreading of asphalt. METHOD OF MEASUREMENT
516.04 Dampproofing will be measured by the square yard of surface area dampproofed.
BASIS OF PAYMENT
516.05 The accepted quantities of dampproofing, including absorptive primer coats, will be
paid for at the contract unit price per square yard. Payment will be made under: Pay Item Pay Unit Dampproofing (Asphalt) Square Yard 516.05 516-2 THIS PAGE INTENTIONALLY LEFT BLANK 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