508Waterproofing Membrane

508.01 Description This work shall consist of furnishing and applying an approved

waterproofing membrane to concrete deck surfaces, or other concrete surfaces, with a barrier type membrane in accordance with this specification, other applicable Contract documents and the manufacturer’s published recommendations, complete, in place and accepted. Waterproofing membrane shall be either peel and stick sheet waterproofing membrane (sheet membrane) or torch or spray applied high performance waterproofing membrane (high performance membrane).

508.02 Materials Sheet membrane and high performance membrane shall include all

materials, as recommended by the manufacturer, to produce a waterproof barrier on the specified concrete surface. In addition to the membrane, these materials may include primer, hot-applied rubberized asphalt sealer, mastic, flashing, aggregate scatter and tack coat. The list of acceptable sheet membrane products is included on the Department’s Qualified Products List (QPL), of Waterproofing Membranes: Standard Systems. The list of acceptable high performance membrane products is included on the Department’s QPL of Waterproofing Membranes: High-Performance (Spray Applied) or High Performance- (Torch Applied).

508.04 Construction- General The Contractor shall store and install the membrane and

all associated components in accordance with the manufacturer’s published recommendations. Existing membrane waterproofing remaining on structures to be rehabilitated shall be completely removed to the primed surfaces. At the discretion of the Resident, tightly adhered membrane residue that cannot reasonably be removed by scraping using industry standard practices, may be left in place. Prior to application of primer or installation of membrane: Concrete shall be cured in accordance with applicable Contract requirements; areas where rapid setting patching materials have been placed shall be cured for a minimum of 72 hours, or as recommended by the product manufacturer. The entire surface of concrete structures specified to receive waterproofing membrane shall be shot blasted to achieve a surface which is clean and free of laitance, oil, grease and any foreign materials, as well as any sharp protrusions or sharp indentations. For superstructure decks, including, but not limited to, precast box beams, voided slabs, and 5-102 NEXT beams, shot blasting shall be accomplished using self-contained, self-propelled equipment to achieve a consistent anchor profile; areas that are not accessible to self- propelled shot blasting equipment, as determined by the Resident, shall be blasted with appropriate equipment utilizing either mineral grit or steel grit and air pressure sufficient to achieve an acceptable surface profile. Surfaces of structures other than superstructure decks, such as box culverts or arches, that are to receive waterproofing membrane may be high-pressure (minimum of 8,000 psi) water blasted or sandblasted, in lieu of being shot blasted, as approved by the Resident. The Contractor shall have a copy of Technical Guideline No. 03732, published by the International Concrete Repair Institute. The final concrete surface profile shall range between a CSP 1 and a CSP 5, as defined by this Guideline, or as approved by the membrane manufacturer’s representative. All surfaces shall then be cleaned to remove all loose dust and debris. Priming and membraning shall only be done when the air and concrete temperatures are above 40 degrees Fahrenheit and the surfaces that are to receive the primer and membrane have a moisture content at, or below, 6 percent. Primer or membrane shall not be applied or installed until the concrete has been in place for a minimum of 10 days. The Contractor shall supply a portable electronic moisture meter capable of measuring the moisture content of concrete surfaces in percent. The list of acceptable moisture meters is included on the Department’s QPL under Waterproofing Membranes. The moisture meter shall be calibrated annually and a certificate of calibration from the moisture meter manufacturer shall accompany the meter. The Contractor shall perform moisture testing of the concrete substrate using the Contractor- provided moisture meter. Moisture tests shall be performed at locations determined by, and in the presence of, the Resident. Written test results shall be submitted to the Resident prior to beginning the priming and membraning operations. Membrane shall be installed in a shingled pattern so that water is permitted to drain to the low areas of the structure without accumulating against seams, and pressed or rolled into place to assure bond with the primed surface and to eliminate air bubbles. Lap joints at the beginning and end of rolls shall be staggered with those of adjacent rolls. All overlapping joints shall be sealed in accordance with the manufacturer’s recommendations. Care shall be taken to ensure that the waterproofing membrane is properly sealed around the one inch diameter superstructure deck drains and that the drains are completely opened prior to paving over them. Any drainage slots in the bridge drains shall be opened both before and after placing the bituminous pavement. Waterproofing membrane over which hot mix asphalt (HMA) pavement will be placed shall receive a bituminous tack coat, in accordance with Standard Specification Section 409, with a coverage rate of between 0.01 and 0.02 gallons per square yard. Alternately, if a membrane manufacturer recommends its own tack coat as part of its waterproofing system, then this tack material shall be applied in accordance with the manufacturer’s recommendations. Prior to tacking, the membrane shall be clean and free from loose debris, moisture or other contaminants. Membrane surfaces that have been tacked shall be paved within 48 hours of application of the tack coat. 5-103 The required laydown temperature of HMA pavement placed on high performance membrane shall be within the tolerances included in the membrane manufacturer’s written recommendations, with the target temperature to be at the high end of the given range, but not to exceed 330 degrees Fahrenheit, measured at the HMA pavement plant. Paving operations shall be done in a manner to permit water to drain to the low area of the deck without entrapment. No vehicles, other than the HMA paving equipment, will be permitted on the membrane prior to placing the HMA pavement. The first layer of HMA pavement placed on a superstructure deck shall be placed with an approved rubber mounted bituminous paver of such type and operated in such a manner that the waterproofing membrane will not be damaged in any way. Paving equipment wheels and tires shall be clean and free from stones or other material that could penetrate the membrane. The tack coat and HMA pavement may be applied immediately after the membrane is installed. For high performance membrane, the primer and membrane shall be applied by a manufacturer certified applicator. Applicators shall be individuals who have been thoroughly trained by the manufacturer, in all aspects of application of the membrane system. Although an individual may be certified as both an applicator and a representative, the individual shall not serve in both capacities at the same time. Upon certification, the manufacturer shall issue a badge to the applicator that includes the manufacturer’s name and logo, a current photograph of the applicator, the applicator’s full name and the word “Applicator”. The text of the badge shall be clearly printed in English. The applicator shall have the badge on and prominently displayed at all times, while installing the membrane system. The Contractor shall arrange for a manufacturer’s representati ve to be present at all times during the installation of high performance membrane, including application of the primer and tack coat. The representative shall also be present for placement of the HMA binder course over the membrane. The representative shall be readily identified by a photo identification badge, issued by the manufacturer, that includes the manufacturer’s name and logo, a current photograph of the representative, the representative’s full name and the word “Representative”. The text of the badge shall be clearly printed in English. The representative shall have the badge on and prominently displayed at all times, while overseeing this work. Overlap of side seams and end laps and application procedures not addressed by this specification shall be done in accordance with the membrane manufacturer's published recommendations. Torn or damaged membrane shall be repaired in accordance with manufacturer’s recommendations. Blistering of membrane at any time prior to Final Acceptance shall be repaired in accordance with the manufacturer’s recommendations. At least one week prior to installation of any waterproofing membrane, the Contractor shall submit the manufacturer’s written requirements pertaining to overlapping of seams, application procedures, repairing of damaged membrane and treatment of blistering of the membrane, including treatment of blistering either before, during or after the first lift of HMA pavement is placed on the membrane, to the Resident.

508.05 Installation- Sheet Membrane All construction joints and all joints between

precast concrete elements (e.g., box culverts, three-sided boxes, arches, box beams, voided 5-104 slabs) shall be double covered with membrane by first applying a sheet with a minimum width of 12 inches, centered along the joint. The perimeter of all membrane placed in a given day's operation shall receive a seal of mastic over the edge of the membrane. Areas around drains or protrusions shall be liberally coated with mastic at the edges. When the membrane is completed, the perimeter shall receive an additional seal of mastic along the edge of the membrane.

508.06 Installation- Torch Applied High Performance Membrane The waterproofing

membrane shall be heat welded onto the prepared substrate. Care shall be taken to assure that the membrane is completely bonded to the primed surface. The Contractor shall be responsible for protection of adjacent areas. Machines used to apply membrane shall be fully functional, including thermostats. When the surface area of a superstructure deck is greater than 8,000 square feet, the membrane shall be machine applied. The machine shall be capable of handling rolls of at least 100 square yards, shall be self-propelled and shall be capable of automatically following the edge of previously placed membrane. Corner detail at edge of superstructure slab/vertical surfaces (e.g., curb or permanent barrier): Membrane material or special flashing shall be installed in corners, in accordance with the manufacturer’s recommendations, to within ½ inch of the top of the HMA wearing surface. In the absence of a manufacturer’s recommended flashing or if the manufacturer does not recommend bending membrane material to conform to this corner configuration, then the following procedure shall be used: The membrane shall be heat welded to the slab to within one inch of the vertical surface; the vertical surface shall be protected to prevent damage or permanent discoloring of the vertical surface; the remaining area between the edge of the membrane and the vertical surface shall be completely sealed with hot-applied rubberized asphalt material, meeting the requirements of the membrane manufacturer’s recommendations; the hot-applied rubberized asphalt material shall be applied so as to form a complete seal between the membrane and the vertical surface and shall extend up the vertical surface to within ½ inch of the top of the HMA wearing surface. Corner detail at end of superstructure slab/vertical surface (e.g., backwall): The waterproofing system shall be placed on vertical surfaces, at the ends of slabs, down the vertical face, a minimum of one foot, unless otherwise shown on the Plans. All joints between buried precast concrete elements (e.g., box culverts, three-sided boxes, arches) shall be double covered with membrane by first applying a strip with a minimum width of 12 inches, centered along the joint. For superstructure decks: Immediately prior to application of the tack coat, the entire surface of the membrane shall be rolled with a rubber tired roller and any blisters found in the membrane shall be repaired with guidance from the manufacturer’s representative, as per the manufacturer’s recommendations; similarly, if blisters appear during or after placement 5-105 of the first lift of HMA pavement, the membrane shall be repaired with guidance from the manufacturer’s representative, as per the manufacturer’s recommendations.

508.07 Installation- Spray Applied High Performance Membrane Spray applied

membrane shall be installed in accordance with the manufacturer’s recommendations. Corner detail at edge of superstructure slab/vertical surfaces (e.g., curb or permanent barrier): The waterproofing system shall be placed to within ½ inch of the top of the HMA wearing surface. Corner detail at end of superstructure slab/vertical surface (e.g., backwall): The waterproofing system shall be placed on vertical surfaces, at the ends of slabs, down the vertical face, a minimum of one foot, unless otherwise shown on the Plans. Aggregate scatter shall be applied to the final coat of membrane, in accordance with the manufacturer’s recommendations. Materials for aggregate scatter shall be in accordance with the manufacturer’s requirements.

508.08 Method of Measurement Waterproofing Membrane will be measured for

payment as one lump sum.

508.09 Basis of Payment Waterproofing Membrane will be paid for at the Contract

lump sum price, which shall be payment in full for furnishing all materials, labor and equipment, including cleaning of concrete surfaces and providing a moisture meter, and all incidentals necessary to provide a waterproof barrier on the specified concrete surface that is properly adhered to the concrete substrate. Tack coat provided as part of the waterproofing membrane manufacturer’s system shall be included in the lump sum price for waterproofing membrane; bituminous tack coat provided in accordance with Standard Specification Section 409, Bituminous Tack Coat, shall be paid for under Item 409.15, Bituminous Tack Coat, Applied. Payment for repair of surfaces to which membrane is to be applied shall be paid for separately, when applicable repair items are included in the Contract. Damage to new concrete surfaces, resulting from the Contractor’s placement or curing operations, or any damage caused by the Contractor’s operations shall be repaired at no cost to the Department. Payment will be made under: P a y I t e m P a y U n i t

508.13 Sheet Waterproofing Membrane Lump Sum

508.14 High Performance Waterproofing Membrane Lump Sum

SECTION 509 -STRUCTURAL PLATE PIPES, PIPE ARCHES, ARCHES, AND METAL BOX CULVERTS 5-106

509.01 Description This work shall consist of furnishing and installing structural plate

pipes, pipe arches, arches, and metal box culverts in accordance with these specifications and in reasonably close conformity with the lines and grades shown in the Contract Documents.

509.02 Materials Material shall meet the requirements of the following Sections of

Division 700 — Materials:

Asphalt Filler for Structural Plate Arches 702.09 Steel Structural Plate Pipe, Pipe Arches, Arches, Box Culverts and Fasteners 707.09 Aluminum Alloy Structural Plate Pipe, Pipe Arches, Arches, Box Culverts and Fasteners 707.14

Waterproofing Membrane in other states

• Alaska 508 · WATERPROOFING MEMBRANE
• Colorado 515 · Waterproofing Membrane
• Utah 07105 · Waterproofing Membrane