AASHTO M 249:2012 Standard Specification for White and Yellow Reflective Thermoplastic Striping Material (Solid Form).
1 .1. This specification covers a reflectorized thermoplastic pavement striping material that is applied to the road surface in a molten state by mechanical means with surface application of glass beads at a rate specified by the purchaser or the manufacturer. Upon cooling to normal pavement temperature, the applied thermoplastic produces an adherent retroreflective stripe of specified color, thickness, and width capable of resisting deformation by traffic.
1.2. The values stated in Si units are to be regarded as the standard.
2. REFERENCED DOCUMENTS
2.1. AASHTO Standards:
• M 247, Glass Beads Used in Pavement Markings
• T 250, Thermoplastic Traffic Line Material
2.2. ASTM Standards:
• D36/D36M, Standard Test Method for Softening Point of Bitumen (Ring-and-Ball Apparatus)
• E 1 710, Standard Test Method for Measurement of Retroreflective Pavement Marking Materials with CEN-Prescribed Geometry Using a Portable Retroreflectorneter
2.3. Federal Standards:
• Fed. Std. No. 141, Paint, Varnish, Lacquer, and Related Materials: Methods of inspection, Sampling and Testing
• Fed. Std. No. 595b, Colors Used in Government Procurement
3. MATERIALS
3.1. The thermoplastic material shall be homogeneously composed of pigment, filler, resins, and glass reflectorizing spheres.
3.1.1. The thermoplastic material shall be available in both white and yellow.
3.1.2. The resin shall be alkyd or hydrocarbon as specified by the purchaser.
3.1.3. The vendor shall have the option of formulating the material according to his or her own specifications. However, the physical and chemical properties contained in this specification shall apply regardless of the type of formulation used.
4.3.1. Color—The thermoplastic material after heating for 240 ± 5 mm at 218 ± 2°C (425 ± 3°F) and cooled to 25 ± 2°C (77 ± 3°F) shall meet the following:
White: Daytime Luminance factor, Y (%) at 45°/0°—geometry and illuminant D65 using the 1931 CIE 2° standard observer Z 75. For highway use, the color shall match Federal Test Standard Number 595b, Color 17886.
Yellow: Daytime Luminance factor, Y (%) at 45°/0°—geometry and illuminant D65 using the 1931 CIE 2° standard observer> 45.
• For highway use, the color shall match Federal Test Standard Number 595b—Color 13538.
• For airport use, the color shall comply with the requirements established by the FAA. The chromaticity and luminance factors shall be within the limits in Table 2 when determined under standard conditions:
a) angle of illumination: 45 degrees;
b) direction of view: perpendicular to surface (0 degrees);
c) illuminant: CIE standard illuminant D65; and d) standard observer: 1931 CIE 2 degrees.
Note 2—The chromatic ity and luminance factors of ordinary colors and colors of retroreflecting materials shall be determined under the following standard conditions:
a) angle of illumination: 45 degrees;
b) direction of view: perpendicular to surface (0 degrees);
C) illuminant: CIE standard illuminant D65: and
d) standard observer: 1931 CIE 2 degrees.AASHTO M 249 pdf download.