TT-P-1952 Paint, Traffic And Airfield Marking, WaterborneThis specification covers three types of low VOC volatile organic compounds, ready-mixed, one-component, 100% acrylic waterborne airfield and traffic marking paint. The paint is suitable for application on such traffic-bearing surfaces as Portland cement concrete, bituminous cement concrete, asphalt, tar, and previously painted areas of these surfaces. The paint may be used either alone or to bind reflective beads.

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TT-P-1952E

5 minutes to ensure uniform distribution. Evaluate the consistency for conformance with

Table 1. Draw down the paint as described in 4.3.3. Evaluate for conformance with

3.2.3.

4.3.5 Flexibility. Determine flexibility in accordance with Method B of ASTM D

522. Draw down the paint to a wet film thickness of 0.13 mm (0.005 in) on a clean, bare, cold-rolled steel panel. Air-dry the panel for 24 hours at standard conditions, then bake for 5 hours at 105°C ± 2°C, and finally condition the panel for 30 minutes at standard conditions. Bend over a 13 mm (0.5 in) diameter cylindrical mandrel and examine under a magnification of 7 diameters for compliance with 3.2.4.

4.3.6 Water resistance. Prepare a 10 by 15 cm concrete panel as specified in Method 2051 Procedure B of FED-STD-141. Draw down to a wet film thickness of 0.33 mm (0.013 in) and allow it to dry in a horizontal position at standard conditions for 72 hours. Immerse one-half of the painted panel in distilled water at 25°C ± 1°C. After 18 hours, remove the panel from the water and allow it to dry for 2 hours at standard conditions. Evaluate for conformance with 3.2.5.

4.3.7 Abrasion resistance.

4.3.7.1 Sample preparation. Draw down the paint on four glass panels measuring approximately 100 by 200 mm to a dry film thickness of 0.102 mm to 0.107 mm.

4.3.7.2 Baked films. Air-dry two of the panels for 24 hours at standard conditions and then bake for 5 hours at 105°C ± 2°C. After baking, condition the panels for 30 minutes at standard conditions and then run the abrasion test as specified in 4.3.7.4.

4.3.7.3 Weathered films. Air-dry the other two panels for 48 hours at standard conditions then subject the panels to accelerated weathering in accordance with 4.3.10. Remove the panels and condition for 24 hours at standard conditions, then run the abrasion test as specified in 4.3.7.4.

4.3.7.4 Test. Subject the panels to the abrasion test in accordance with ASTM D

968, Method A, except that the inside diameter of the metal guide tube shall be from

18.97 to 19.05 mm. Five liters of unused sand shall be used for each test panel. The test shall be run on two test panels. (Note: Five liters of sand weigh 7.94 kg.) Evaluate for compliance with 3.2.11.

4.3.8 Freeze-thaw stability. Test in accordance with ASTM D 2243 for three freeze-thaw cycles. Perform the consistency test in accordance with ASTM D 562 and the scrub resistance test as described in 4.3.12. Check for conformance with 3.2.6.