465 SECTION 619 WATERPROOFING
619.1 -DESCRIPTION : This work shall consist of waterproofing concrete retaining walls, abutments, earth -filled arches, and concrete decks, either in the form of dampproofing (primers with bituminous paint coat) or membrane waterproofing ( primers with bituminous membrane fabric, with or without protection course) as specified on the Plans. Dampproofing shall consist of a primer and two coats of bituminous materials. Membrane waterproofing shall consist of a primer, two layers of fabric, and three moppings of hot bituminous material. The work shall be done in accordance with the Specifications and as shown on the Plans.
619.2 -MATERIALS : The materials shall conform to the requirement of the several Su bsections of Division 700 of these Specifications as follows:
MATERIAL SUBSECTION TYPE Dampproofing Agent 705.4, 705.11
705.7SS-1 or SS -1h
CSS-1 or CSS -1h Dampproofing Primer 705.4, 705.11 or 705.8 SS-1 or SS -1h CSS-1 or CSS -1h Hot-Poured Elastic Type Concrete Joint Sealer 708.3 Membrane Waterproofing 705.8 Membrane Waterproofing 705.7 Reinforcing Steel 709.3 Waterproofing Fabric 715.8
When the dampproofing agent is SS -1, the primer shall be SS -1 to which shall be added a maximum of 15 percent (15%) water by weight. Membrane fabric shall be stored in a dry, protected place. The rolls shall not be stored on end.
CONSTRUCTION METHODS
619.3 -PREPARATION OF SURFACE : Before applying the primer coat, all rod holes and other voids shall be pointed, and all projections, loose material, and excess dust shall be removed from the surface. When emulsion is used, the surface may be damp. When asphalt is used, the surface shall be thoroughly dry. Should the surface be damp, it shall be covered with a two ( 2) inches layer of hot sand which shall be allowed to remain for two hours, after which it shall be swept back, uncovering sufficient surface for beginning of work, and the operation repeated as the work progresses. For surfaces too steep to hold sand, other satisfactory methods to produce a dry surface shall be used. No waterproofing shall be done in wet weather or when the temperature is below 35° F, without written authority of the Engineer.