8−87butt weld. Elbows, tees and crosses may also be produced by this method.
812.04 METHOD OF MEASUREMENT. Unless covered by a Special Provision, together with a
corresponding Proposal Item, waterstops will not be measured separately for payment. 812.05 BASIS OF PAYMENT. Unless covered by a specific Proposal Item, waterstops will not be paid for separately and are deemed incidental to the respective pay item for the concrete listed in the proposal.
813.01 DESCRIPTION. This work consists of providing waterproofing and dampproofing systems
on concrete bridge decks and other surfaces at the locations indicated on the Plans and where directed by the Engineer, all in accordance with these Specifications.
813.01.1 Systems.
a.Waterproofing shall consist of the application of heat-applied pre-fabricated membrane or a cold spray-applied liquid membrane, all as set forth below.
b.Dampproofing shall be formulated to apply to surfaces to minimize the intrusion of moisture in areas that will not bear traffic.
813.01.2 Dampproofing. This type of dampproofing consists of the application of a RIDOT
approved dampproofing material to concrete surfaces in strict compliance with the manufacturer's recommendations.
813.01.3 Heat-applied Pre-Fabricated Membrane. This type of waterproofing consists of applying
a heat-applied bituminous polymer -modified reinforced membrane of RIDOT approved manufacture to concrete surfaces in strict compliance with the manufacturer's recommendations.
813.01.4 Cold Spray-Applied Liquid Membrane. This type of waterproofing system consists of
applying a spray applied plural component resin based elastomeric membrane of RIDOT approved manufacturer to concrete surfaces in strict compliance with the manufacturer's recommendations.
813.02 MATERIALS. 813.02.1 General. Materials for waterproofing and dampproofing systems shall be delivered in
original, tightly sealed containers or unopened pack ages, clearly labeled with manufacturer's name, brand name and number, and batch number of the materi al where appropriate. Prior to delivery, the Contractor shall submit to the Engineer a notarized Certificate of Compliance provided by the manufacturer attesting that the material conforms to the product requirements as approved by the Department. The primer shall be as reco mmended by the system manufacturer. 8−88 813.02.2 Dampproofing. The dampproofing and all associated materials shall conform to
M.12.01.1.
813.02.3 Heat-applied Pre-Fabricated Membrane. The primer and membrane materials of this
system shall conform to the respective requirements of Subsection M.12.02.1 of these Specifications.
813.02.4 Cold Spray-Applied Liquid Membrane. The primer and membrane materials of this
system shall conform to the respective requirements of Subsection M.12.02.2 of these Specifications.
813.03 Construction Methods.
813.03.1 Surface Preparation for All Types. Prior to the start of the application of the
product, new concrete or repair materials shall have cured in accordance with the Standard Specifications or the manufacturer’s recommendations, whichever is more stringent. If required, degreasing shall be performed with detergent washing in accordance with ASTM D4258 (Standard Practice for Surface Cleaning Concrete for Coating). Concrete surfaces shall be abrasively cleaned in accordance with ASTM D4259 (Standard Practice for Abrading Concrete) and all spalls and depressions repaired with concrete patch materi als per the manufacturer's recommendations and to the satisfaction of the Engineer. Voids and blowholes on vertical surfaces shall be repaired in the same manner. All steel surfaces shall be prepared to a near white metal finish per SSPC-10 and overcoated with the manufacturer’s specified primer within 4 hours, per the manufacturer’s recommendations. All surfaces to receive the material shall be free of oil, grease, curing compounds, algae, moss, laitance, friable matter, bituminous products, previous waterproofing membranes and any other material that could adversely affect adhesion. The Contractor shall be responsible for the protection and repair of equipment and adjacent areas from overspray or other contamination that may be caused by application of the waterproofing or dampproofing.
813.03.2 Dampproofing.
a.When directed by the Engineer, the Contractor shall furnish the services of a competent technical field representative of the approved manufacturer to be present at the work site prior to any use of materials. The representative shall in struct the Contractor on installation and inspection procedures in the presence of the Engineer. The representative shall inspect the condition of the prepared surfaces and verify that all surfaces to be treated meet the requirements for application of the material. The application shall not proceed until the representative and the Engineer accept the surface preparation.
b.Limitations. The dampproofing shall be applied in a ccordance with the manufacturer’s recommendations.
c.Application. Concrete surfaces which are to be protected by dampproofing with an approved bituminous material for abs orptive treatment shall be applied in strict compliance with the manufacturer’s recommendations as approved by the Engineer. The bituminous material shall completely cover the surface with a continuous film to the thickness recommended by the manufacturer. When any breaks or thin spots show in the dampproofed surface after drying, they shall be retouched to provide a uniform impervious coating per the manufacturer’s recommended procedure. The interval between successive applications shall be as recommended by the
Source: Rhode Island Standard Specifications (Bluebook), 2024 Edition. Pages 421–422 of 826.