AASHTO M247-09 Download


Standard Specification for Glass Beads Used in Pavement Markings
standard by American Association of State and Highway Transportation Officials, 01/01/2009




1.1. This specification covers glass beads to be dropped or sprayed upon pavement markings so as toproduce a reflectorized pavement marking.

1.2. Types:
1.2.1. Type 0–shall be known as a uniform gradation.
1.2.2. Type 1–shall be known as a standard gradation.
1.2.3. Types 2, 3, 4, and 5–shall be known as modified gradations.

1.3. Coatings:
1.3.1. Flotation–Any of the above gradation types may be obtained with oleophobic properties at therequest of the purchaser (Note 1).
1.3.2. Moisture Resistance–Any of the above types may be obtained with hydrophobic properties if sospecified by the purchaser.
1.3.3. Adherence–Any of the above types may be obtained with an adhesion coating is so specified bythe purchaser.

Note 1–Any of the above types of beads may be specified with a combination of two of theabove coatings. Dual coated beads must test positive for the presence of both specified properties.

1.4. The values stated in SI units are to be regarded as the standard.

1.5. This standard may involve hazardous materials, operations, and equipment. This standard doesnot purport to address all of the safety concerns associated with its use. It is the responsibility ofthe user of this standard to consult and establish appropriate safety and health practices anddetermine the applicability of regulatory limitations prior to use

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