Opta Waive
Britesphere Road Beads

Britesphere 247

Britesphere 247 meets or exceeds AASHTO 247 specification for pavement marking beads. Britesphere 247 beads are transparent, clean, colorless glass, smooth and spherically shaped, free from milkiness, pits, or excessive air bubbles. Britesphere 247 beads do not exhibit characteristics of toxicity, relative to heavy metals, when tested in accordance with EPA No 40, CFR 261.24.

Briteshpere 247 also meets the gradation requirements as specified by AASHTO 247 and FP-03 for large beads, as illustrated in the following table:

Sieve Mass Percent Passing
Mesh Micron Type I Type IM Type II Type 4
10 3000 - - - 100
12 1700 - - - 95-100
14 1400 - - - 80-95
16 1180 100 100 - 10-40
18 1000 - - - 0-5
20 850 90-100 90-97 - 0-2
30 600 75-95 50-75 100 -
40 425 - 15-45 90-100 -
50 300 15-35 0-15 50-75 -
80 177 - 0-5 0-5 -
100 150 0-5 - - -

The AASHTO 247 specification adheres to the following standards for testing:

ASTM Standards

D 75 Standard practice for sampling aggregates
D 1214 Test method of Sieve Analysis of Glass Spheres
D 1155 Test method for roundness of glass spheres
D 1213 Test method for Crushing Resistance of glass spheres
E 105 Standard practice for probability sampling of materials
E 1617 Standard practice for reporting particle size characterization data

Federal Standards

No 40, CFR 261.24 Maximum concentration of contaminants for toxicity characteristic

Advantages of Britesphere 247

  • No characteristics of toxicity
  • Exceeds min. 75% roundness
  • All Britesphere road marking beads (Type I, II, III and IV) are available in:
    • Non- coated
    • Silicone coated
    • Silane coated
    • Silicone/Silane (dual) coated
  • Refractive index ≥ 1.503
  • Consistent quality to guarantee excellent retro-reflective performance
  • All Britesphere Glass Beads for Road Marking paints are manufactured and tested according to ASTM Specifications

Characteristics

Colour: Colourless and transparent, no visible bubbles and impurities.
Density 2.4 – 2.6 g/cm3
Grain Shape Spherical bead, guaranteed 75% roundness, actual Average 85%
Refractive Index ≥ 1.50

Packaging:

  • 55 lb paper bags, 2200 lb (40 bags) Super Sacs
  • Custom screened and larger sizes available upon request.

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