00494756

Component

http://onlinepubs.trb.org...trr/1989/1230/1230-004.pdf

https://scholar.google.co...nner&publication_year=1989

Many changes have occurred in the pavement marking industry in the past 20 years, especially the commercialization of polymeric nonshrink binders (epoxy, polyester) as durable striping materials. These materials are normally applied at thicknesses between 15 and 20 mils. Thermoplastic materials are used with application techniques and resin systems unknown 20 years ago. These materials are applied at thicknesses between 40 and 125 mils. It became apparent that as striping line durability and net line thickness increased, glass bead characteristics had to change. The extended durability of these films has shown the need for bead surface treatments that improve bead adherence to the binders. The rheology and wet film application of these new materials indicate a need for a large-diameter glass bead. Use of larger beads fits the theoretical requirement of bead embedment and binder thickness for optimum retroreflectivity. The author explains that when pavement markings are viewed as a system (i.e., bead size and surface treatment are compatible with a specific striping material), improved reflective performance can be obtained with the added benefit of wet pavement/nighttime reflectivity.

This paper appears in Transportation Research Record No. 1230, Work-Zone Traffic Control and Tests of Delineation Material. 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

01414222

p. 28-36

1989

Transportation Research Record

030904961X

Figures (9) ; Photos (8) ; References (10) ; Tables (4)

Anchoring; Durability; Epoxides; Glass beads; Night; Pavements; Polyester resins; Reflectivity; Retroreflectivity; Road markings; Thermoplastic materials; Thickness; Wet weather

Embedment; Wet pavements

Highways; Operations and Traffic Management; Pavements; I73: Traffic Control

TRIS, TRB, ATRI

Jun 30 1990 12:00AM

• CHARACTERISTICS OF CONSTRUCTION-ZONE ACCIDENTS
• DURABILITY TESTING FOR RETROREFLECTIVE SHEETINGS
• EMBEDMENT AND RETROREFLECTIVITY OF DROP-ON GLASS SPHERES IN THERMOPLASTIC MARKINGS
• IN-SERVICE EVALUATION OF THERMOPLASTIC AND TAPE PAVEMENT MARKINGS USING A PORTABLE RETROREFLECTOMETER
• RESEARCH ON RAISED PAVEMENT MARKERS
• TRAFFIC CONTROL FOR SHORT-DURATION MAINTENANCE OPERATIONS ON FOUR-LANE DIVIDED HIGHWAYS
• WORK-ZONE TRAFFIC CONTROL CONCEPTS AND TERMINOLOGY