Other requirements:

The material shall be suitable for application in film thickness from 1.0mm up to 15.0mm. Normal surface applications will be from 1.5mm to 3.0mm thick. The material when cured shall be flexible when cast into film thickness of 2.0mm to 5.0mm. The material shall contain no solvents. The material shall be suitable for application on new and old asphalt. Bond strength on any of these surfaces shall be sufficient for the material to remain in place for a number of years, under most normal conditions.



The surface of the spheres shall be smooth and free from film, scratched, and pits. At least 80% shall be of true spherical shape, and free from milkiness, dark or air inclusions, and other defects.



The liquid immersion method at 25 degrees celcius may be used to determine the refractive index of glass spheres. A refractive index to 1.5 to 1.6 is required.

Gradation:

The spheres shall meet the following gradation requirements when tested in accordance with ASTM designation D-12214.

Spheres included in manufacture and application on liquid material shall meet the following standards:

U.S Standard Sieve
Passing #900 um
Passing #300 um
Passing #200 um

% Passing
90 - 100
20 - 50
0 - 10