917 MISCELLANEOUS PROTECTIVE COATINGS
Jump to navigation Jump to search
This is not a legal document. Please see disclaimer for more information.
917.01 EPOXY PROTECTIVE COATINGS FOR CONCRETE
- Protective coatings shall be two component epoxy systems for use in conjunction with concrete. One component shall be a clear or pigmented condensation product of the reaction of epichlorohydrin with bisphenol A, the resin of which shall be composed of 100 percent reactive constituents. The other component shall be a clear polyamide hardener.
- The producer shall submit a sample of each component for laboratory analysis. The sample shall be coded as the original sample. The original and all subsequent samples shall conform to the following:
TEST PROPERTY TEST METHOD SPECIFICATION LIMITS Pot Life, hr min Fed. Spec TT-C-535 8 Color AMS-STD-595A Gray No. 26440 Dry Film Thickness
1st coat, mil min
2nd coat, mil min
Sagging D4400 Must pass test for Recommended film Thickness Flexibility Federal Spec TT-P-115 Must not crack, check or delaminate Infrared Spectrogram Equipment Manufacturer's Procedure Each component shall match original sample Tensile Strength, psi min MSMT 609 400
917.02 FUSION BONDED EPOXY POWDER COATINGS FOR STEEL
- A775. The epoxy protective coating shall be a one-coat, heat curable, thermosetting powdered coating that is electrostatically applied on metal surfaces as specified. For reinforcement steel, the color shall be bright, in order to contrast with the normal color of reinforcement and rust (e.g. orange, red, green, yellow etc. and not brown or any color in the rust family). Reinforcement steel coated before fabrication shall have all hairline cracks and minor damage on fabrication bends patched, even if there is no bond loss. Select epoxy coating material from the Qualified Products List (QPL) maintained by the Office of Materials Technology (OMT).
- 917.02.01 Touch Up System. D3963. Material used for the touch up system shall be a two part epoxy system designated and color matched for patching the epoxy coating used.
- Patching material shall be available through the manufacturer of the epoxy powder. The patching material shall be fully cured one hour after application at 35 F ambient.
- 917.02.02 Certification. The manufacturer shall furnish certification as specified in TC-1.03.
917.03 FUSION BONDED POLYESTER POWDER SYSTEM
- 917.03.01 Materials. The polyester powder system shall consist of an epoxy zinc rich primer and a super durable TGIC (Triglycidyl Isocyanurate) polyester topcoat. The finish powder shall be a TGIC polyester powder. The polyester powder manufacturer shall be selected from the QPL maintained by OMT.
- 917.03.02 Primer. Primer shall be an epoxy zinc rich primer supplied by the same manufacturer as the finish powder. Primer shall meet the following:
TEST PROPERTY TEST METHOD SPECIFICATION LIMITS Salt Spray 3000 hrs B117 < 1/32 in. undercut, no blisters Humidity resistance 3000 hrs D2247 < 1/32 in. undercut, no blisters Hardness D3363 2H-3H Adhesion D3359 5B
- 917.03.03 Qualification Requirements. The following physical tests will be required to qualify the polyester and are not required for certification.
TEST PROPERTY TEST METHOD SPECIFICATION LIMITS Abrasion Resistance D1044 - Taber Abraser CS-10, 1000 gm load, 1000 cycles, 100 mg max weight loss Adhesion D3359, Method A (Bonderite 1000 panel) Rating 5A Gloss D525, 60° initial 30 - 45 per AMS-STD-595A Hardness D3363 Min 2H - No gouge Impact D2794 Pass 80 in. lb Salt Spray Resistance B117, D 1654 1000 hr (Bonderite 1000 panel) Table 2, Rating 7 Thickness G12 7 ± 2 mills Color E1331 or E1338 As specified in the Contract Documents from AMS-STD-595A Color No. 20040 Infrared Spectrogram Equipment manufacture's procedures Manufacturer's IR Weather Resistance D4587, test condition D. Test shall be conducted with a UVA lamp (340 nm peak) for 1000 hr 50% min gloss retention Specific Gravity D5965 Manufacturer's result Chloride Permeability A775, A 1.3.4 <0.0001M
- 917.03.04 Certification. The polyester powder manufacturer shall furnish production batch certification as specified in TC-1.03 showing conformance to the following:
TEST PROPERTY TEST METHOD SPECIFICATION LIMITS Infrared Spectrogram D2621 Match Qualification sample Taber Abrasion Resistance, mg loss, max 4060 100 Specific gravity D5965 (Method A) Qualification sample ± 0.02 Color E1331 or E1338 Match AMS-STD-595A color no. specified in Contract Documents
- 917.03.05 Coating System.
Powder Coat Dry Film Thickness Usage Epoxy primer I 2.5-4.0 Primer Polyester Powder II 5.0-7.0 Finish
- 917.03.06 Acceptance. Acceptance will be based on the quality control test results required on the manufacturer's certification. The coating applicator shall be responsible for reviewing certifications to ensure conformance to TC-1.03 . The coating applicator shall also maintain a file of all reviewed certifications.
917.04 ANTI-GRAFFITI PROTECTIVE COATINGS
- The manufacturer shall provide certification for all anti-graffiti protective coatings material per TC-1.03.
- 917.04.01 Materials. Use any product that meets specifications limits described below.
|TEST PROPERTY||TEST METHOD||SPECIFICATION LIMITS|
|Graffiti Resistance (solvent cleanable) Complete removal of solvent-based acrylic, polyurethane, and alkyd spray paint; after exposure; and recleanability||D6578||Cleanability Level 8, 9, or 10|
|VOC (EPA rule 40 CFR 59)||D3960||Less than specified limits of local, state, or federal codes and regulations|
|Fluid Resistance, Spot Test using Paint Thinner and Gasoline||D1308||No blistering, discoloration, softening or adhesion loss|
|Set-to-Touch Time||D1640*||4 hr. maximum|
|Dry-Through Time||D1640*||24 hr. maximum|
|Adhesion||D6677||Passes, Rating 8|
|Outdoor Weathering Exposure (solvent and water cleanable)||D6578||No blistering, cracking, checking, chalking, or delamination; color change less than 2# Delta E CIE LAB units: Retention of 60°Gloss ratio >=.90|
|Lab-Accelerated Weathering Exposure, Cycle 2, UV light, 2000 cycles||D4587||No visible color change and loss of gloss, and no film erosion and cracking|
|Standard Outdoor Exposure, outdoor exposure of 6 months minimum||G7||No visible color change and loss of gloss, and no film erosion and cracking|
|MEK Resistance||D4752||min 4.|
|Breathability:||D1653||>95% water vapor transmission.|
∗3 mil wet film tested at 77 degrees