FLOATING BEADS: BROAD OR NARROW GRADATION?

Through the use of theory and in road service tests the 2 most common types of floating beads, narrow and broad gradation, were evaluated. These tests, which included several control lines using a broad-gradation non-floating bead, showed that the broad-gradation floating bead performed best under all conditions. The narrow-gradation floating beads gave good reflectivity under dry conditions but invariably demonstrated poor reflectivity under the slightest rainfall conditions. These effects are demonstrated through the use of wet and dry night photographs of dual centerline test sections.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1975/539/539-010.pdf
• Summary URL:
  • https://scholar.google.com/scholar_lookup?title=FLOATING+BEADS%3A+BROAD+OR+NARROW+GRADATION%3F&author=J.+DaForno&publication_year=1975
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309023904
• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Coatings, Signing, and Marking Materials. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • DaForno, John J
• Conference:
  • 54th Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia
  • Date: 1975-1-13 to 1975-1-17
• Publication Date: 1975

Media Info

• Media Type: Print
• Features: Figures; References;
• Pagination: pp 94-100
• Monograph Title: Corrosion, Concrete, Quality Control, and Paint Beads
• Serial:
  • Transportation Research Record
  • Issue Number: 539
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Aggregate gradation; Evaluation; Glass beads; Moisture content; Night; Rainfall; Reflectivity; Road marking materials; Testing
• Uncontrolled Terms: Wet conditions
• Old TRIS Terms: Gradation; Traffic marking materials
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00126836
• Record Type: Publication
• ISBN: 0309023904
• Files: TRIS, TRB
• Created Date: Dec 16 1975 12:00AM