559 POLYUREA PAVEMENT MARKINGS

559.01 DESCRIPTION

Furnish and apply two component polyurea pavement markings to roadway surfaces as specified and as directed.

559.02 MATERIALS

Polyurea Pavement Markings	951.10
Glass Beads	951.09

Polyurea is a durable material. Select Polyurea Pavement Markings from the Qualified Products List (QPL).

559.03 CONSTRUCTION

549.03

559.03.01 Quality Control. 549.03.01

559.03.02 Quality Assurance. 549.03.02

559.03.03 Cleaning Pavement Surfaces. 549.03.07

559.03.04 Quality Control Test Strip. 549.03.09

559.03.05 Application Equipment. Use application equipment capable of applying two component polyurea pavement marking material, as approved. Provide access to the application equipment for inspection.

(a)Temperature Gauges. Use temperature gauges that have been calibrated every six months and submit a copy of the calibration certification according to the QPL.

(b)Footage Counters. Use calibrated footage counters to measure pavement markings and submit notarized certification according to the QPL.

(c)Usage Counters. Use equipment that is equipped with material usage counters and printers or measure tanks manually using equipment manufacturer certified tables. Use beginning and ending quantities to calculate thickness of applied lines and record according to the QPL.

(d)Bead Dispenser. Equipment shall be capable of application of glass beads to the surface of the pavement marking dispensed closely behind the binder application device.

(e)Material Dispenser. Use equipment capable of applying longitudinal markings at multiple width settings ranging from 5 in. to 12 in. as demonstrated by the quality control strip and as specified. Reconduct the quality control strip whenever the guns are repositioned or adjusted after the initial quality control strip. The equipment shall air-blast the pavement, apply the stripe, and immediately drop glass beads in a single pass at speeds up to 8 mph.

559.03.06 Maneuverability. Use truck mounted equipment that is mobile and maneuverable to the extent that straight lines can be followed, and all standard curves can be made in true arcs and capable of cleanly cutting off stripe ends. The glass beads applicator shall be equipped with an automatic cut-off control that is synchronized with the binder material cut-off.

(a) The glass beads applicator shall deliver a uniform drop rate at required application speeds.

(b) The glass beads are applied so they are properly embedded and appear uniform on the entire traffic marking.

(c) The equipment shall proportion two volumes of Parts A to every one volume of Part B and mix the liquid components continuously to ensure proper cure.

(d) The equipment shall heat and maintain the heated temperature of the liquid components to ensure optimal mixing and spraying of material.

559.03.07 Cleanliness. Clean all parts of the equipment thoroughly of foreign or different colored material prior to introducing a new batch of material.

559.03.08 Application. Install markings at the location, width, and type as specified and as directed. Do not install pavement marking material over longitudinal joints; offset 2 in. or as directed.

(a) Ambient Conditions Apply material when the ambient and surface temperatures is above 32 F and rising at the time of application and the relative humidity conforms to the manufacturer's recommendations.

(b) Moisture in Pavement MSMT 729. Do not apply material if test is positive for moisture. Do not apply if ice is present on the pavement surface.

(c) Application Temperature Temperature of applied material shall conform to the manufacturer’s recommendations.

(d) Surface Applied Glass Beads/Elements MSMT 729. Apply 20 lb glass beads per gallon.

(e) Thickness MSMT 729. Apply the material at a wet film thickness of 20 ± 1 mils.

(f) Color MSMT 729.

(g) Retroreflectance MSMT 729. Measure the retroreflectance as specified.

(h) Curing 549.03.10.

(i) Observation Period 549.03.11.

(j) Submittals Supply MSDS, Product Data Sheets, and Quality Control Plans.

559.04 MEASUREMENT AND PAYMENT

Polyurea Pavement Markings will be measured and paid for at the Contract unit price per linear foot for the color and width specified. Payment will be full compensation for all pavement preparation, furnishing and placing of markings, testing, and for all material, labor, equipment, tools, and incidentals necessary to complete the work.