627— Thermoplastic Pavement Markings

627.1 Description

1 Furnish and place thermoplastic pavement markings according to the Contract documents and the Manual on Uniform Traffic Control Devices (MUTCD). 2 The work also includes the determination of passing/no passing zones on two lane facilities according to the MUTCD where existing passing/no passing zones have not been established. Provide the Department with data used in establishing passing/no passing zones.

627.2 Materials

627.2.1 General

1 Provide thermoplastic pavement marking material that is a reflectorized mixture of a thermoplastic binder and spherical glass beads upon which additional glass beads are applied by dropping immediately following application.

627.2.2 Thermoplastic Binder Compound

627.2.2 1 General

1 Ensure that the thermoplastic binder compound complies with AASHTO M 249 as modified herein. 2 The material may be shipped in the granulated form or the block form. Use alkyd based thermoplastic pavement markings. 3 Ensure that the alkyd/maleic binder consists of a mixture of synthetic resins containing high boiling point plasticizers and at least one synthetic resin that is solid at room temperature. Use a binder with at least one- half of its composition consisting of 100% maleic -modified glycerol of resin and not less than 15% by weight of the entire material formulation. Ensure that the binder does not contain petroleum hydrocarbon resins. Ensure that resins/rosins used are maleic -modified glycerol esters. 4 Ensure that the thermoplastic material dissolves immediately in diacetone alcohol. Slow dissolution is evidence of the presence of hydrocarbon binder components, which are not allowed.

627.2.2 2 Yellow Thermoplastic

1 Use a yellow thermoplastic that is lead- free (L/F). Ensure that the material does not contain more than 3 ppm of lead by weight in a cured state and not more than 100 ppm of total heavy metals as defined by the Resource Conservation and Recovery Act ( RCRA ), including lead and hexavalent chromium when tested according to Environmental Protection Agency ( EPA) Methods 3050 and 6010.