1.0 Description This specification covers thermoplastic, latex based traffic line paint and glass beads suitable for use as retro reflective pavement markings on bituminous or PCC pavement. 1.1 If road does not have edge markings and has an ADT of 5000 or more, edge lines must be installed as well. Road to have edge lines will be determined by Engineer and noted prior to bidding. 2.0 Materials A. Paint Use white or yellow paint that is specifically manufactured for use on traffic markings. The paint must comply with volatile organic compound (VOC) requirements, be lead and other toxic heavy metal free, and exhibit the following qualities: 1. The non-volatile portion of the vehicle shall be composed of a 100% acrylicpolymer as determined by infrared spectral analysis. 2. Yellow and white paint shall have a minimum of 60% solids by volume. 3. The paint shall have a minimum of 60% and a maximum of 62% pigment by weight. 4. Dry-Opacity: A contrast ratio of not less than 0.96 when the paint is applied with a 0.015 in. film applicator. Dry Opacity will be determined according to Method 4121, Federal Test Method Standard No. 141a. Apply the paint to the chart specified in Section 1.1 of Method 4121. 5. Daylight Directional Reflectance of the white paint shall not be less than 85% as determined in accordance with ASTM E 1347 using the 45/0 illumination. 6. Color Match: Yellow paint shall match Federal Standard 595 color number 33538 tested in accordance with ASTM D 1729 with the daylight illumination represented by CIE Illuminant D75 or D65. White paint shall not exceed a yellowness index of 12 when tested in accordance with ASTM D 1925. 7. Titanium Dioxide Content: Yellow paint shall contain a maximum of 0.2 lb./gal rutile titanium dioxide. White paint shall contain a minimum of 1 lb./gal rutile titanium dioxide. Determine the titanium dioxide content using the aluminum reduction method of ASTM D 1394.Drying Time: The paint shall dry to a no tracking condition in no more than 90 seconds. The no tracking condition shall be determined by actual application on the pavement at a wet film thickness of 0.015 in. with white or yellow paint covered with glass beads at a rate of 6 lb./gal. Pavement temperatures shall be between 60 and 100° F and under all humidity conditions providing that the pavement is dry. The no tracking time shall be determined by passing over the paint line 90 seconds after paint application, in a simulated passing maneuver at a constant speed of 30 to 40 mph with a passenger car. A line showing no visual deposition of the paint to the pavement surface when viewed from a distance of 50 feet from the point where the test vehicle has crossed the line shall be considered as showing no tracking.
