Overview of AASHTO M247-II Drop On Glass Beads
AASHTO M247-II drop on glass beads are engineered to improve the visibility and longevity of road markings. These beads adhere to the American Association of State Highway and Transportation Officials (AASHTO) M247-II standard, ensuring they meet stringent quality and performance criteria. They are applied by dropping them onto freshly painted road markings, where they embed themselves into the paint to enhance reflectivity.
Specifications and technical data
| Parameter | Details |
|---|---|
| Composition | High-quality glass |
| Appearance | Transparent, colorless |
| Shape | Spherical |
| Refractive Index | ≥1.5 |
| Size Range | 53 – 1180 microns |
| Roundness | ≥80 |
| Hardness | 6-7 Moh’s |
| Coating Types | Moisture proof coating, Flotation coating, Adhesion coating |
| Application Method | Drop on the top of road marking paint |
| Durability | Maintains reflectivity for 1 – 3 years depending on use |
| Standards | AASHTO M247-Type II |
Benefits of AASHTO M247-II Drop On Glass Beads
Enhanced Nighttime Visibility
One of the primary benefits of AASHTO M247-II drop on glass beads is their ability to significantly enhance the visibility of road markings during nighttime. By reflecting light from vehicle headlights, these beads improve driver awareness and reduce the risk of accidents.
Long-Term Durability
These glass beads are designed to withstand heavy traffic and adverse weather conditions, maintaining their reflective properties over extended periods. This durability reduces the frequency of road maintenance, offering cost-effectiveness for transportation departments.
Ease of Application
Their drop-on application method allows for easy integration into freshly painted road markings, ensuring uniform dispersion and maximum reflectivity. This simplicity enhances operational efficiency during road marking projects.
Features of AASHTO M247-II Drop On Glass Beads
High Reflectivity and Uniformity
AASHTO M247-II drop on glass beads are renowned for their high reflectivity, ensuring superior visibility of road markings under various lighting conditions. Their uniform size distribution minimizes surface irregularities, enhancing the aesthetic appeal of road markings.
Environmental Considerations
Manufactured from environmentally friendly materials, such as recycled glass, these beads support sustainable practices in road construction and maintenance. Their eco-friendly composition aligns with global efforts to reduce environmental impact.
Versatility in Road Marking Applications
They are compatible with various road marking materials, including epoxy and thermoplastic paints, offering flexibility in application methods while maintaining high levels of reflectivity and durability.
FAQs about AASHTO M247-II Drop On Glass Beads
What are AASHTO M247-II drop on glass beads?
These beads are glass particles applied onto freshly painted road markings to enhance their reflectivity.
How do AASHTO M247-II beads improve road safety?
By reflecting light from vehicle headlights, they make road markings more visible, particularly at night or in adverse weather conditions.
Are AASHTO M247-II beads durable?
Yes, they are designed to withstand wear from traffic and weather, maintaining their reflective properties over time.
Where can I purchase AASHTO M247-II drop on glass beads?
Top suppliers include Potters Industries, Swarco, 3M Traffic Safety Systems, and Jinan Jingyu Glass Bead Co.
What sizes are available for AASHTO M247-II beads?
They range from 75 µm to 850 µm, catering to various road marking requirements.
Do AASHTO M247-II beads comply with American standards?
Yes, they adhere to the AASHTO M247-II standard, ensuring quality and performance in road marking applications.
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