Citation

Minor CE, Cody LW. Highw. Res. Board bull. 1952; 57: 71-76.

Copyright

(Copyright © 1952, National Research Council (U.S.A.), Highway Research Board)

DOI

unavailable

PMID

unavailable

Abstract

Traffic paint in washington is applied by spraying. Glass beads, which improve the effective life as well as the visibility of traffic stripes, are mixed with the paint prior to spraying. The paint, in addition to being a good bead binder, must have the following properties for proper spray application: (1) viscosity between 75 and 85 krebs units, (2) good nonsettling properties, (3) ability to wet moist surfaces, and (4) drying time not longer than 15 min. Two types of spray machines are used. The first type is an independently steered push-cart machine which carries the spray guns and is pushed by a truck carrying the paint supply. The second type is a self-contained unit in which the paint is carried on the truck and the guns are suspended from a rear platform on the truck. An average crew consists of three vehicles, including the spray machine, and a personnel complement of six men: 20 to 25 mi. Of stripe per day can be applied if the paint dries in 15 min. Or less. Since 1949, field application has been supervised and coordinated by laboratory personnel. Equipment has been modified to enable spray machines to apply beaded mixtures efficiently at a spread rate of 21 to 22 gal. Per mi. Of 4-in. Stripe. A rapid and reliable method of checking field application rate is described.