1008.01 GENERAL. Paints shall be delivered in clean, unopened
shipping containers complying with Surface Transportation Board (STB) requirements. Each paint container shall bear a label containing the following information: name and address of manufacturer, trade name or trademark, kind of paint, color of paint, number of gallons (L), batch number, and date of production. The material shall not show skinning, settling, color change, thickening, or livering that can not be eliminated by normal mixing procedures. Store, mix, and apply according to manufacturer’s recommendations. Discard paint after the manufacturer's recommended shelf life has expired. DOTD’s test results are valid for 12 months.
1008.02 ZINC PAINT SYSTEMS. The zinc paint system shall be from
the Approved Materials List. Each system will be tested in accordance with AASHTO R 31. Zinc paint systems shall conform to the specification requirements of AASHTO R 31. All zinc paint systems shall meet the performance requirements listed in the latest Northeast Protective Coating Committee (NEPCOAT) Acceptance Criteria for New and 100 percent Bare Existing Steel for Bridges. The latest acceptance criteria can be found on the NEPCOAT website at www.nepcoat.org under the Qualified Products for Protective Coatings for New and 100 percent Bare Existing Steel for Bridges document. Paint used on projects will be sampled and tested and shall comply with the following requirements: Table 1008-1 Zinc Paint System Properties Property Test Method Tolerance1 Pigment Content. ASTM D2698 ±2.0% Density ASTM D1475 ±0.25 lbs/gal (±0.03 kg/l) Solids Content ASTM D2369 ±2.0% Non-volatile in Vehicle Content ASTM D2698 ±2.0% Viscosity, Ku ASTM D562 ±5KU Dry to Touch ASTM D1640 ±10% Dry Through ASTM D1640 ±10% Sag, Lenetta ASTM D4400 ±10% Infrared Spectrum DOTD TR 610 Match Original2 1Target Values shall be established by the Materials and Testing Section upon qualification of the paint system. 2Standards for infrared spectrum shall be kept on file and compared to project samples for acceptance purposes. The topcoat shall be tinted to match federal color # 36463 from Federal Standard 595C for non-weathering steel and tinted to match federal color # 30045 from Federal Standard 595C for weathering steel, unless otherwise specified.
1008.03 Asphaltic Varnish.
1008.03.1 Material: Asphaltic varnish shall be composed of hard
native asphalts or asphaltites (gilsonite, for example), run (fluxed) and blended with properly treated drying oils, and thinned with suitable solvents with the necessary amount of dryers.
1008.03.2 Appearance: The film sample will be poured on a clean,
clear glass plate, and then placed in a vertical position until the excess varnish drains off. The sample is then examined by transmitted light. A smooth and homogeneous sample is acceptable.
1008.03.3 Color: Color shall be jet black when examined by
reflected light.
1008.03.4 Solids Content: Solids content shall not be less than 40
percent by weight (mass) when tested in accordance with ASTM D2369.
1008.03.5 Drying of Film:
1008.03.5 1 Set to Touch: Film shall set to touch in not more
than 8 hours when tested in accordance with ASTM D1640.
1008.03.5 2 Dry Through: Film shall dry through in not more
than 36 hours when tested in accordance with ASTM D1640.
1008.03.6 Working Properties and Appearance of Dried Film:
Varnish shall have good brushing, flowing, covering, and leveling properties. Dried film shall be jet black, smooth, and free from brush marks, blisters, pinholes, and other defects.
1008.03.7 Water Resistance: Film shall show no whitening,
dulling, or other defects after a dried film is immersed in water for 18 hours and air dried for 2 hours.
1008.04 COAL TAR EPOXY-POLYAMIDE PAINT. Comply with
SSPC-Paint 16.
1008.05 COLD GALVANIZED REPAIR COMPOUND. Use a
product from the Approved Materials List. The material shall be supplied from the manufacturer in unopened aerosol cans or unopened friction top cans. The cans shall be labeled with the manufacturer's name, product name, batch number, and expiration date. The pigment shall contain a minimum of 90 percent metallic zinc. Dried film shall be relatively smooth, and free from blisters, pinholes, sags, and other defects. A minimal amount of brush marks is acceptable. Test panels coated with the compound will be tested in a sal t fog apparatus in accordance with ASTM B117 for 1500 hours. The panels shall show no signs of rusting, blistering, undercutting, delamination, or other deleterious conditions.
1008.06 CORROSION INHIBITING ALKYD PAINT SYSTEM. Use
a three-coat paint system which is compatible with basic lead silico chromate paint. The corrosion inhibiting pigment shall be calcium borosilicate. The primer and the intermediate coats shall be tinted for color contrast. Use aluminum topcoat in accordance with SSPC-Paint 101, Type I for both systems.
1008.06.1 Specific Requirements: Comply with the following:
Table 1008-2 Corrosion Inhibiting Alkyd Paint System Properties, Primer Property Test Method Min Max Pigment, % by wt ASTM D2371 53 — Vehicle, % by wt ASTM D2372 — 47 Density, lbs/gal ASTM D1475 11.4 — Water, % — 0.25 Coarse Particle and Skins (Total Residue Retained on No. 325 Sieve Based on Paint), % ASTM D185 — 1.0 Fineness of Grind (North Std) ASTM D1210 5 — Viscosity (Stormer-Krebs Units) @ 77°F ASTM D562 75 85 Dry Through, Hours ASTM D1640 — 18 Non-volatile in Vehicle, % by wt ASTM D2369 & ASTM D2372 57 — Table 1008-3 Corrosion Inhibiting Alkyd Paint System Properties, Intermediate Coat Property Test Method Min Max Pigment, % by wt ASTM D2371 44 — Vehicle, % by wt ASTM D2372 — 56 Density, lbs/gal ASTM D1475 10.2 — Water, % — 0.25 Coarse Particle and Skins (Total Residue Retained on No. 325 Sieve Based on Paint), % ASTM D185 — 1.0 Fineness of Grind (North Std) ASTM D1210 5 — Viscosity (Stormer-Krebs Units) @ 77°F ASTM D562 75 85 Dry Through, Hours ASTM D1640 — -10 Non-volatile in Vehicle, % by wt ASTM D2369 & ASTM D2372 45 — Table 1008-4 Corrosion Inhibiting Alkyd Paint System Chemical Requirements, Prime Pigment Test Method Min Max Calcium Boro-Silicate ASTM D4288 80.0% — Synthetic Iron Oxide, Class I ASTM D84 16.0% 18.0% Organo Montmorillonite 1.0% 2.0% VEHICLE Alkyd Resin Solution, Type I, Class A Fed. Spec TT-R-266 43.0% 50.0% Linseed Oil ASTM D234 20.0% 27.0% Mineral Spirits, Type II1 Fed. Spec TT-T-291E 28.0% Driers 1.0% 2.0% 1Small quantities of alcohols or alcohol/water mixtures may replace some mineral spirits where such materials are used as polar additives for the suspending aid. Table 1008-5 Corrosion Inhibiting Alkyd Paint System Chemical Requirements, Intermediate Coat Pigment Test Method Min Max Calcium Boro-Silicate ASTM D4288 80.0% — Synthetic Iron Oxide, Class I ASTM D84 17.5% 18.5% Organo Montmorillonite 1.5% 2.5% Lampblack — 2.0% VEHICLE Alkyd Resin Solution, Type I, Class A Fed. Spec TT-R-266 65.0% — Mineral Spirits, Type II1 Fed. Spec TT-T-291E — 34.0% Driers 1.0% 1.5% 1Small quantities of alcohols or alcohol/water mixtures may replace some mineral spirits where such materials are used as polar additives for the suspending aid.
1008.07 Vacant.
1008.08 Maintenance Overcoating of Steel Bridges.
Use an overcoat system from the Approved Materials List. For source approval, a field trial is required, which consists of a three year side-by- side comparison between the new overcoat system and a corrosion inhibiting alkyd paint “control” system. Both systems shall overcoat a red lead paint system and/or approved alternate system. The new overcoat paint system shall perform as well or better than the control system in the areas of blistering, rusting, fading, chalking, and adhesion. Alternate testing programs such as NTPEP and NEPOVERCOAT will be allowed if approved by the Materials Engineer Administrator. Paint used on projects will be sampled and tested and shall comply with the following requirements: Table 1008-6 Paint Overcoat System Properties Property Test Method Tolerance1 Pigment Content ASTM D2698 ±2.0% Density ASTM D1475 ±0.25 lbs/gal (±0.03 kg/l) Total Solids Content ASTM D2369 ±2.0% Non-volatile in Vehicle Content ASTM D2698 ±2.0% Viscosity, Ku ASTM D562 ±5KU Dry to Touch ASTM D1640 ±10% Dry Through ASTM D1640 ±10% Sag, Lenetta ASTM D4400 ±10% Infrared Spectrum DOTD TR 610 Match original2 1Target values shall be established by the Materials and Testing Section upon qualification of the paint system. 2Standards for infrared spectrum shall be kept on file and compared to project samples for acceptance purposes. The topcoat shall be tinted to match fe deral color # 36463 from Federal Standard 595C for non-weathering steel and tinted to match federal color # 30045 from Federal Standard 595C, for weathering steel, unless otherwise specified.
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