enacted to ensure compliance with Federal Clean Air Standards. Paint
materials shall conform to the restrictions of the local Air Pollution
Control District.
2.2
THERMOPLASTIC COMPOUNDS
The thermoplastic reflectorized pavement marking compound shall be extruded
or sprayed in a molten state onto a primed pavement surface. Following a
surface application of glass beads and upon cooling to normal pavement
temperatures, the marking shall be an adherent reflectorized strip of the
specified thickness and width that is capable of resisting deformation by
traffic.
2.2.1
Composition Requirements
The binder component shall be formulated as a hydrocarbon resin. The
pigment, beads and filler shall be uniformly dispersed in the binder resin.
The thermoplastic composition shall be free from all skins, dirt, and
foreign objects and shall comply with the following requirements:
Percent by Weight
_________________
Component
White
Yellow
_________
_____
______
Binder
17 min.
17 min.
Titanium dioxide
10 min.
-
Glass beads,
20 min.
20 min.
Calcium carbonate
49 max.
*
& inert fillers
Yellow pigments
-
*
*Amount and type of yellow pigment, calcium carbonate and inert fillers
shall be at the option of the manufacturer, providing the other composition
requirements of this specification are met.
2.2.2
2.2.2.1
Color
The color shall be as indicated.
2.2.2.2
Drying Time
When installed at 20 degrees C 70 degrees F and in thicknesses between 3
and 5 mm 1/8 and 3/16 inch, after curing 15 minutes.
2.2.2.3
Softening Point
The composition shall have a softening point of not less than 90 degrees C
194 degrees F when tested in accordance with ASTM E 28.
SECTION 02763A
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