It is intended to be of benefit to the public, contractors, application crews, project engineers and inspectors.īoth the government and the contractor want performance, the government to maximize its investment value, and the contractor to maximize his efficiency. The objective of this handbook is to provide sufficient information to enhance the opportunities for successful hot-applied thermoplastic pavement marking applications. Such occurrences can be avoided by having well- defined material and application specifications, well- maintained application equipment, as well as following sensible, cooperative inspections procedures. It is understandably discouraging to both application crews and project engineers when a thermoplastic application process does not function properly. While most coatings applications are performed in controlled environments, striping crews perform their work under continually varying conditions such as changes in temperature, humidity, pavement types, traffic and travel. Each of these elements requires sound judgment, planning and execution. Successful applications of all types of coatings, including thermoplastic, are the result of a happy marriage of chemistry, material handling, surface preparation and application techniques. Throughout the world hot-applied thermoplastic is the preferred durable pavement marking system, providing exceptional traffic control and total life-cycle cost performance value. Maximize material and traffic safety procedures.Observe finished appearance and bonding.Monitor drop-on glass bead application rate and embedment.Apply materials at proper bonding temperatures.Verify material temperatures & calibrate kettle thermometers.Residual primer solvent must evaporate prior to thermoplastic application.Apply primer (where recommended) and thermoplastic at correct thickness.Pavement and air temperatures should be above 50F.Do not mix alkyd and hydrocarbon thermoplastic.Maintain daily application & inspection records.
Specifications should be carefully prepared.Criteria for Successful Thermoplastic Application
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