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Title:

FLAMESPRAY COATING AS AN ENVIRONMENTALLY ACCEPTABLE PAVEMENT MARKING TECHNIQUE
Cover of FLAMESPRAY COATING AS AN ENVIRONMENTALLY ACCEPTABLE PAVEMENT MARKING TECHNIQUE

Accession Number:

00939673

Record Type:

Monograph

Availability:

National Technical Information Service

5301 Shawnee Road
Alexandria, VA 22312 United States
Order Number: PB2003-102863

Abstract:

This Innovations Deserving Exploratory Analysis (IDEA) project's goal was to develop an environmentally safe flamespray coating technique using new polymer formulations for pavement marking. Initial investigations of commercially available alkyd thermoplastic resins suggested their suitability for flamespray applications. However, the resins contained premixed glass beads that made them unsuitable for flamespray applications. Also, the resin particle size was found to be too large to allow a uniform flamespraying. These problems were addressed by custom blending the alkyd resin without glass beads, melt extruding and cryogenic grinding to reduce particle size. However, the process produced very fine dust-like particles and the non-resin components in the mix tended to separate when the material was fluidized. Two new formulations with different levels of solid plasticizer in base resin were compounded via extrusion followed by cryogenic grinding to reduce the particle size of the product. These formulations could be flamesprayed onto concrete substrates and showed good adhesion and abrasion resistance. The approach appears feasible but will require modification of the spray gun to obtain better edge definition. Further work is necessary to optimize the resin formulations and evaluate their long-term weather durability.

Supplemental Notes:

This NCHRP-IDEA investigation was conducted by Research Triangle Institute, Durham, North Carolina. 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

Report/Paper Numbers:

NCHRP-IDEA Project 70

Contract Numbers:

NCHRP-70

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Andrady, A

Pagination:

22 p.

Publication Date:

2003-2

Serial:

NCHRP-IDEA Program Project Final Report

Publisher: Transportation Research Board

Period Covered:

0003-0209

Features:

Figures (1) ; Photos (2) ; Tables (5)

Subject Areas:

Environment; Highways; Maintenance and Preservation; I61: Equipment and Maintenance Methods

Files:

TRIS, TRB

Created Date:

Mar 4 2003 12:00AM