Specification and all design criteria. Incl ude the lot number, description and test results in the certification. Internal holding pins are required for all shim plates when the contract plans indicate the structure contains the necessary corrosion protection for a corrosive site. Repair laminate d (reinforced) bearing pads utilizing external holding pins via vulcanization. Submit product data for repair material and a detailed application procedure to the Materials and Tests Unit for approval before use and annually thereafter.
The elastomer for all bearings shall be classified as Grade 3. The shear modulus of the elastomer for laminated (reinforced) bearings shall be 160 psi, unless otherwise noted in the plans. Provide Grade 50 or Grade 60 durometer hardness elastomer in a ll (unreinforced) bearings, unless otherwise noted in the plans.
The optional test procedures of AASHTO M 251 are not required, except as specified herein. Determine the shear modulus of the elastomer for laminated (reinforced) bearings in accordance with ASTM D4014. At the Manufacturer's option, plain (unreinforced) bearings may be tested using the methods of Appendices X1 and X2 of AASHTO M 251. Test at least two bearings per lot or as directed by the Engineer. Define a “lot” as a group of 100 or less bearings with or without holes or slots, which are:
and cured under the same conditi ons, and
more than 40% ). A lot may include bearings from multiple projects and purchasers.
Submit a set of detailed fabrication drawings and procedures of laminated (reinforced) bearings to the Engineer for review, comments and acceptance. Show complete details and all material specifications. Clearly identify any proposed deviations from details shown in the plans or requirements of the Standard Specifications . Obtain drawing approval before manufacturing of the bearings. PAINT AND PAINT MATERIALS -1 GENERAL All batches or lots of paint products shall be Department approved prior to use by the Materials and Tests Unit . Self -curing inorganic zinc paint shall also be pre -qualified as required in Article 37 -5. Deliver all Department approved paints to the point of appli cation in sealed and original containers clearly marked with the type of paint and batch or lot numbers clearly labeled on the container. At the point of application all paints shall arrive ready to be mixed for use without additional oil or thinner. Mix all paints in accordance with the manufacturer’s printed instructions . All paints or paint components that harden or curdle in the container and will not break up with a paddle to form a smooth, uniform consistency will be rejected by the Engineer . Any thinning necessitated by weather conditions shall be approved in writing and
use only those thinners approved by the manufacturer. Thinning of any waterborne paints shall be prohibited. Upon receipt at the point of application, store all paint mate rials in a moisture free environment between 40°F and 110°F or at such temperatures within this range recommended by the manufacturer of which the more stringent shall apply. The storage areas shall be equipped with a device capable of recording daily high and low temperatures. -2 PAINT VEHICLES, THINNERS AND DR YERS Paint vehicles, thinners and dryers shall meet the requirements for these ingredients that are included in the Standard Specifications for the paint being used. Only ingredients recommended by the manufacturer which have a history of compatibility with each other and so recorded on the manufacturer product data sheet may be used. -3 PACKING AND MARKING Ship paint and paint materials in strong, substantial containers that are properly labeled and plainly marked with the weight, color and volume in gallons of the paint content; a true statement of the percentage composition of the pigment; the proportions of pigment to vehicle; and the name and address of the manufacturer. Any package or container not so marked as described above or exceeding 5 gallons total volume shall require prior approval by the Department. -4 INSPECTION AND SAMPLING All paint components shall be sampled and approved by the Department ’s Material and Tests Unit, either at the point of manufacture or at the point of application . Inspection and sampling will be performed at the point of manufacture wherever possible. The Contractor shall not begin painting until the analysis of the paint has been performed, and the paint has been accepted by the Department. When sampling paint products, use the Department sampling procedure . In order for materials to be evaluated and accepted by the Department, coating manufacturers shall submit completed performance test data from the AASHTO Product Evaluation & Audit Solutions or test results from ISO certified laboratories reporting requirements as required for each paint listed in Articles 1080- 5 through 1080 -10. -5 SELF -CURING INORGANIC ZINC PAINT Use only Department approved and qualified inorganic zinc paint. These products shall be requalified every five years unless the formulation of the product or manufacturing process is changed, in which case, the product shall be requalified before use. Samples for qualification shall be submitted to the State Materials Engineer six months in advance along with the following:
name, location, product name, mixing inst ructions, batch number and SDS .
Test.
the Adhesion Pull Test, ASTM D4541. For new qualifications or where product formulation has changed provide the Department the following.
been tested for slip coefficient and meets AASHTO M 300, Class B.
Resistance Test, Cyclic Weathering Resistance Test, and Bullet Hole Immersion Test as specified in AASHTO M 300.
Use the same batch of paint for all samples and panels. The independent test laboratory report may be for a typical batch of the same product. Subm it samples and reports for qualification at least six months in advance of anticipated need. The Materials and Tests Unit will conduct all tests of paints in accordance with ASTM, Federal Test Method Standard No. 141 and various other methods in use. Use a self -curing inorganic zinc paint meeting the Type I Inorganic Zinc Primer paint specified in AASHTO M 300 and the following:
surfaces and with th e finish paint. -6 COAL TAR EPOXY PAINT Use coal tar epoxy paint meeting SSPC -Paint 16. -7 ORGANIC- ZINC REPAIR PAINT Use organic -zinc repair pai nt meeting SSPC -Paint 20 Type II or Federal Specification TT -P-641. Organic -zinc repair paint is not tinted and is applied 3 to 4 wet mils of paint per coat. Do not use zinc paint in aerosol spray cans. Use organic -zinc repair paint that is listed on the NCDOT APL. -8 METALLIZATION SEALERS Use low-viscosity, clear or colored and pigmented as approved by the Engineer. Sealer products are formulated to flow over and be absorbed into the natural pores of the thermal sprayed coating (TSC) . The pigment particle size for colored sealer must be small enough to flow easily into the pore of the TSC, nominally a 5- fineness of grind per ASTM D1210. -9 WATERBORNE PAINTS Paint manufacturers must have a Department approved and qualified self -curing inorganic zinc product to submit a waterborne paint product for approval.
Use ingredients and proportions as specified in Tables 1080- 1 through 1080 -3. Do not use Chrome Green. Provide raw materials based on the specified ingredients that are uniform, stable in storage, and free from grit and coarse particles. Do not use rosin or rosin derivatives. Beneficial additives such as anti -skinning agents, suspending agents or wetting aids are allowed.
Use both Type I and II paints that meet Tables 1080- 1 through 1080- 3.
Normal for the materials permitted in accordance with ASTM D1296.
The colors before and after w eathering when compared with AMS -STD -595 are Brown #30045, Green #24108 and Gray #26622. There are no color requirements for white waterborne paint. The Engineer may approve the use of semi -gloss or gloss products for the above Department colors.
Use a paint that is easily applied by brush, roller or spray when tested i n accordance with Federal Test Method Standard No. 141, Methods 4321, 4331 and 4541. Ensure that the paint shows no streaking, running or sagging during application or while drying.
Prior to application, e nsure that the paint shows no t hickening, curdling, gelling or hard caking when tested as specified in Federal Test Method Standard No. 141, Method 3011, after storage for 6 months from the date of delivery, in a full, tightly covered container, at a temperature of 50° F to 110°F.
No skinning is allowed in a 3- quarters filled closed container after 48 hours when tested in the standard manner specified in Federal Test Method Standard No. 141, Method 3021.
Minimize the content of salt contamination by the incorpo ration of only high purity materials. Ensure that the specific resistance of the aqueous leachate of the composite of the pigments in required proportions is at least 5,000 ohm -cm when tested in accordance with ASTM D2448.
Provide ea ch type of paint that meets the early rust requirements specified in Structural Steel Shop Coatings Program Section 7 .
All materials supplied under this Specification are subject to random inspection by the Department. Supply samples of any or all ingredients used in the manufacture of this paint, along with the supplier’s name and identification for the material when requested.
Ensure that the VOC content after formulation, but before thinning, complies w ith the VOC limit for the applicable coatings category per Federal regulations. Notify the coating specifier if State or local regulations reduce the maximum VOC content permitted for coatings applied in a specific locality.
A color variation of 5 Δe units from the specified color will be acceptable. After 3 months weathering, the color shall not vary more than 5 ∆e units from the original color value.
Retained on Std. 325 Mesh Screen Volatiles Lead Acid Soluble Pigments A Phthalocyanine Pigments Lamp Black Tinting Pigments Iron Oxide Zinc Phosphate Titanium Dioxide Magnesium Silicate Calcium Carbonate Major Pigments Pigment Content Property Table 1080-1 Composition of Pigments for Waterborne Paints, % By Weight - - - - - - - 45% 10% - - - 20% Minimum Brown 0 0.5% 2.0 lb/gal 0.005% - - - - - - - - 25% Maximum - - - - - - 2% - 10% 45% - 30% 35% Minimum White 0 0.5% 2.0 lb/gal 0.005% 0 2% - - - - 12% - 40% Maximum - - - - - - - - 10% 70% - - 13% Minimum Gray 0 0.5% 2.0 lb/gal 0.005% 0 - - - - - - - 17% Maximum - ASTM D185 ASTM D2369 - - ASTM D1135 & D3256 ASTM D209 ASTM D3721 ASTM D6280 ASTM D476, Type II ASTM D605 ASTM D1199 ASTM D3723 Test Method
Composition of Vehicle for Waterborne Paints, % By Weight 2% 5% - 30% Minimum Brown - - 55% - Maximum 2% 5% - 30% Minimum White - - 55% - Maximum 4% 5% - 30% Minimum Gray - - 58% - Maximum Test Method
finish with a 1.7 +0.5 mil profile. Color, AMS -STD -595 Adhesion B pH Gloss, Specular @ 60 degrees Leneta Sag Test Early Rust Flash Point, F (degrees) Drying Time, Hours, Dry Hard Drying Time, Hours, Tack Free Fineness of Grind, Hegman Units Density, lb./US gallon Consistency A Sheer Rate 200 rpm, Consistency A Sheer Rate 200 rpm, Ounces Property Table 1080- Properties of Waterborne Paints, % By Weight 30045 4B 8.0 Report Value 10+ 9 Report Value - - 5.0 9.7 3.2 255 Minimum Brown - - 9.0 Report Value - - Report Value 24 3 - - 3.5 350 Maximum - 4B 8.0 Report Value 10+ 9 Report Value - - 5.0 11.0 3.2 255 Minimum White - - 9.0 Report Value - - Report Value 24 3 - - 3.5 350 Maximum 26622 4B 8.0 40 10+ 9 Report Value - - 5.0 9.35 90 255 Minimum Gray - - 9.0 - - - Report Value 24 3 - - 100 350 Maximum ASTM D2244 ASTM D3359 ASTM E70 ASTM D523 ASTM D4400 Structural Steel Shop Coatings Program ASTM D3278 ASTM D1640 ASTM D1640 ASTM D1210 ASTM D1475 ASTM D562 ASTM D562 Test Method
-10 WATERPROOFING EPOXY Waterproofing epoxy coating systems are intended for protecting concrete exposed to splash zones and tidal water. Use 100% solids epoxy coatings that adhere to concrete, wood, steel, and other structural materials. Multi- coat systems shall utilize a red primer coat with a gray topcoat to provide visual aid in ensuring adequate coverage during application. Use waterproofing epoxy systems found on the NCDOT APL. Waterproofing epoxy coating materials, which includes primer and topcoat, shall meet the followi ng criteria in Table 1080- 4. TABLE 1080 -4 WATERPROOFING EPOXY PROPERTIES Property Values Test Method Absorption, 24 hr, max. (%) 0.5% ASTM D570 Bond Strength, 14 days, min. 1500 psi ASTM C882 Tensile Strength, 7 days, min. 2000 psi ASTM D638 -11 PAINT FOR VERTICAL MARKERS For vertical markers, use a waterborne acrylic or alkyd type material meeting Table 1080 -5. Apply sufficient paint to completely cover the color of the underlying substrate along with any surface imperfections. TABLE 1080 -5 PROPERTIES OF PAINT FOR VERTICAL MARKERS Property Requirement Test Method Color # 27040 Black or # 13538 AMS -STD -595 Adhesion to Substrate 3A Min. ASTM D3359 -12 EPOXY RESIN FOR REINFORCING STEEL Submit epoxy resin powder products to the State Materials Engineer for approval. Epoxy resins shall meet ASTM A775 or ASTM A934 to qualify for use. A list of prequalified epoxy resin powder sources is available from the State Materials Engineer. Manufacturers of approved epoxy resin powder products shall submit a request for requalification every 5 years and any time a change is made in the manufacturing process, change is made to the chemical composition of the epoxy resin or a requalification is requested by the Engineer . Use powdered resin of any color that provides contrast to the corroded or uncorroded surface of the steel. Provide material of the same quality as that used for prequalification tests and as represented by test reports forwarded to the State Materials Engineer. Ensure the manufacturer of the epoxy resin supplies to the coating applier information on the resin that is essential to the proper use and performance of the resin as a coating. Ensure the manufacturer of the resin furn ish the coating applier a written certification signed by a responsible officer of the company that the material furnished for coating the reinforced steel is the same formulation as that for which test reports were previously submitted to the State Materials Engineer. With each batch of coating material, furnish a written certification by the coating applier to the Engineer which properly identifies the batch number, material, quantity represented, date of manufacture, name and address of manufacturer and includes a statement that the supplied coating material is the same composition as that prequalified.
-13 ABRASIVE MATERIALS FOR BLAST CLEANING STEEL Select the gradation of the abrasive to impart the anchor profile specified.
Use blasting abrasives with suitable steel or mineral abrasives containing no more than 100 ppm of any corrosive compound such as sulfate or chloride or 100 ppm of any EPA characteristic waste compound such as lead, chromium or arsenic. Mineral and slag abrasives as defined by SSPC AB -1 are not to be recycled without written permission from the Department. The end user of the abrasive (e.g. shop or contractor), shall provide the Department with the abrasive conformance testing certificate as required in SSPC AB -1 and perform field quality control testing immediately prior to use at the minimum frequency specified in SSPC AB -1.
Ferrous metallic abrasives are new and previously unused material. The end user ( e.g. shop or contractor) of the abrasive shall provide the Department with the abrasive conformance testing certificate as required by SSPC AB -3 and perform the abrasive cleanliness testing and conductivity testing immediately prior to use when not recorded on the manufacturer’s certification. The frequency for this testing is once per 55 gallon barrel of abrasive.
Shop facilities shall annually acquire a composite sample of their recycled abrasive (work mix) in the Department’s Materials and Tests Unit presence. A composite sample is a mixture of individual samples taken from a minimum of three separate areas of the work mix. The composite sample is to be tested at an accredited laboratory and provide the Department with a TCLP analysis and sulfate and chloride testing. The shop shal l provide annually, the Department with a notarized Type 3 certification certifying the plant location has not used their facilities or equipment for the removal of lead based coatings. Prior to starting work, field contractors recycled work mix used shal l meet the requirements of SSPC AB -2 prior to first use for each Department project. Shop and Field Contractors cleaned work mix shall meet the requirements of SSPC AB -2 and maintain the size and shape of the abrasive to impart the specified profile. The quality control inspector shall document and test the cleaned work mix prior to starting work once every 12 hours or once every work shift whichever period is shorter. Abrasive testing shall meet and be performed in accordance with SSPC AB -2, ASTM D 4940, ASTM D7393, SSPC PA -17 and the contract . Nonconforming work mix shall not be used, shall be removed from equipment and shall be disposed of in accordance with federal, state, and local regulations and project specification requirements . If non -compliant work mix is detected during continuous recycling following three failing testing attempts blasting and handling equipment shall be checked for residual contamin ation after removal of the contaminated media. Following cleaning, new compliant media should be fed through the equipment and shall be tested for compliance with requirements of SSPC -AB 2 before production work resumes. -14 FIELD PERFORMANCE AND SERVICE Do not use paint products inspected by the Engineer and found to exhibit poor performance in similar North Carolina environments. Poor performance is defined as any coating failing to meet ASTM D610, Grade 5, or having greater than 3% rusting or disbonding before attaining 5 years of service.