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 8−89manufacturer. The completed dampproofing shall be protected by the Contractor from damage by subsequent construction operations using methods and materials approved in advance by the Engineer.
813.03.3 Heat-applied Pre-Fabricated Membrane.
a.Application. The Contractor’s team of applicators shall be trained and certified by the manufacturer of the membrane to install the product. The Contractor shall provide documentation from the manufacturer of the prefabricated waterp roofing sheet membrane t hat the applicators have been certified to install the membrane system. A field representative of the approved manufacturer shall be present at the work site prior to any use of materials. The representative shall review, with the Contractor and the Engineer, the installation and inspection procedures and inspect the condition of any surfaces to receive the membrane. All concrete surfaces in contact with the membrane shall be clean and dry, before the application of any part of this system. The representative shall confirm to the Engineer that the surface condition is suitable to receive the membrane system.
b.Primer. The manufacturer’s recommended primer shall be applied by spray, brush or rollers in accordance with the manufacturer’s recommendations. Coverage rates shall be per the manufacturer’s recommendations. The primer shall be applied only to areas that are to be covered with membrane within the following 24 hours. Any areas not covered within 24 hours must be re-primed at no additional cost to the State.
c.Membrane. The prefabricated waterproofing sheet membrane shall only be applied when the primed substrate surface is clean and dry. The membrane shall not be applied over a water-based bituminous primer until the emulsion breaks completely. The membrane shall be applied only when the surface and ambient temperatures are within the ranges specified in the manufacturer’s recommendations. The membrane shall be rolled out in the area to be applied to ensure correct placement. Installation of the membrane shall be per the manufacturer’s recommendations. Application of the prefabricated waterproofing sheet membrane is to be by a “heat-bonded” method approved by the manufacturer. Care must be taken to avoid overheating the membrane material. A heat source sufficient to melt the lower layer of the membrane shall be used. Sufficient heat is evident when the modified bitumen polymer compound liquefies and just appears beside the roll and/or on front of the roll. Overlapping of the membrane edges shall be per the manufacturer’s recommendations. Membrane installation shall begin at the outside perimeter of the pavement adjacent to the curb and then progress to the high point of the pavement on the bridge. The height onto the vertical curb shall be at least 2 inches but no more than 3-inches.
d.Inspection and Repair. After completion of installation, the Contractor’s installer shall check for the following: air bubbles on the membrane top layer, any unattached membrane and/or any unattached lapped seams and any tears or holes. All air bubbles shall be cut. Air bubble cuts and/or unattached membrane shall be heat-bonded again. All damaged areas (including holes) shall be repaired with new material per the manufacturer’s recommendations and to the satisfaction of the Engineer. All primer stains or bitumen on curbs, sidewalks or surfaces that are not to be covered by membrane shall be cleaned to the satisfaction of the Engineer.
e.Placement of Wearing Surface. The wearing surface shall be placed as soon as possible after application of the membrane. The temperature of the overlay when placed on the membrane must meet the manufacturer’s requirements in order to achieve a proper bond between the overlay and the membrane. If no temperature guidance is provided by the manufacturer, the overlay temperature shall be a minimum of 320°F. 8−90 813.03.4 Cold Spray-Applied Liquid Membrane.
a.Application. Application shall only proceed while air and substrate temperature are within the temperature range recommended by the m anufacturer, providing the substrate is above the dew point. Outside this temperature range, the manufacturer shall be consulted; work shall not proceed without written documentation from the manufacturer approving the modified acceptable substrate temperature. All components of the system shall be measured and mixed strictly in accordance with the manufacturer's recommendations. Mixing shall be done with either an air driven high-speed paddle or an explosion proof mixer. A field representative of the approved manufacturer shall be present at the work site prior to any use of materials. The representative shall review, with the Contractor and the Engineer, t he installation and inspection procedures and inspect the condition of any surfaces to receive the membrane. All concrete surfaces in contact with the membrane shall be clean and dry, before the application of any part of this system. The representative shall confirm to the Engineer that the surface condition is suitable to receive the membrane system.
1.Primer. The manufacturer’s recommended primer shall be applied by spray, roller or brush in accordance with the manufacturer’s recommendations on all steel and concrete surfaces intended to receive the membrane. This primer shall be cured per the manufacturer’s recommendations before application of the waterproofing membrane.
2.Membrane. The waterproofing membrane shall be spray applied with suitable equipment, approved by the manufacturer. The applicator shall per form film thickness tests in accordance with SSPC-PA2 Measurement of Dry Coating Thickness, using 1/8-inch thick (minimum) steel coupons sprayed during the deck application so as to accurately represent the application procedure. The membrane shall cure between coats, as needed, and before application of the tack coat, per the manufacturer’s recommendation. Apply aggregate broadcast into membrane per the manufacturer’s recommendations.
3.Quality Control Testing. Quality control testing is the responsibility of the Contractor. Random tests for adequate tensile bond strength of the cured membrane to the substrate shall be conducted by the applicator on site per ASTM D4541 at a minimum frequency of three randomly-placed tests per 5,000 square feet. Areas less than 5000 square feet shall receive a minimum of three randomly-placed tests. Should the tensile bond strengths be lower than 100 psi on concrete (unless failure occurs within the concrete) or 290 psi on steel, the Engineer may request further surface preparation. Damage as a result of the adhesion testing shall be r epaired by the applicator and shall be considered incidental to the application of the membrane. Testing for the thickness of each membrane layer shall be per the manufacturer’s recommended method.
4.Acceptance Testing . Acceptance testing is the responsibility of the Engineer. Sampling frequency for all tests will be as deemed necessary by the Engineer. Adhesion testing will be per ASTM D4541. Damage as a result of the adhesion testing shall be repaired by the applicator at no additional cost to the State. Film thickness testing will be by non-destructive methods where feasible. If destructive testing is required, damage as a result of the thickness testing shall be repaired by the applicator at no additional cost to the State.
5.Tack Coat. A tack coat, approved by the membrane manufacturer, shall be applied directly to the waterproofing membrane prior to paving, in accordance with the manufacturer’s recommendations. 8−91b. Repairs.
1.Patching. If an area is left untreated or the me mbrane becomes damaged, a patch repair shall be carried out to restore the integrity of the system. Patching shall be per the manufacturer’s recommendations and to the satisfaction of the Engineer.
2.Overlapping. Where the membrane is to be joined to existing cured material and at day joints, the new application shall overlap the existing one by at least 4 inches. Preparation shall be per the manufacturer’s recommendations.
c.Protection. During all stages of application and until the membrane is overlaid, the Contractor shall protect the membrane from damage.
d.Final Inspection. The Engineer, the Contractor and the applicator shall jointly inspect the deck area(s) in which the completed system has been installed, prior to placing the asphalt overlay. Any portion of the work that doesn’t confor m to the specifications and meet the satisfaction of the Engineer shall be corrected at this time.
813.04 METHOD OF MEASUREMENT. "Dampproofing," “Heat-applied Pre-Fabricated Membrane
and "Cold Spray-Applied Liquid Membrane," will be m easured by the number of square yards of the neat area of the system actually placed in accordance with the Plans and these Specifications and as directed by the Engineer.
813.05 BASIS OF PAYMENT. The accepted quantities of "Dampproofing," “Heat-
applied Pre-Fabricated Membrane,” and "Cold Spray-Applied Liquid Membrane,” will be paid for at their respective contract unit prices per square ya rd as listed in the Proposal. The prices so-stated constitute full and complete compensation for all labor, materials, equipment, and all incidentals required to finish the work, complete and accepted by the Engineer. SECTION 814 PLACEMENT OF CONCRETE BRIDGE DECKS
814.01 DESCRIPTION. This work consists of the placement of concrete bridge decks by using
self-propelled finishing machines, all as indicated on the Plans and in accordance with these Specifications. 814.02 MATERIALS. Materials for all Portland cement concrete mixes shall conform to the requirements of SECTION M.02; PORTLAND CEMENT CONCRETE , of these Specifications.
814.03 CONSTRUCTION METHODS. 814.03.1 General. All equipment, tools, and requirements pertaining to the classification, proportioning, and testing for the specified class of concrete, including batching, mixing, handling,
Source: Rhode Island Standard Specifications (Bluebook), 2024 Edition. Pages 422–425 of 826.