ITEM 643  POLYESTER PAVEMENT MARKING

643.01  Description

643.02  Materials

643.03  Equipment

643.04  Application

643.05  Basis of Payment

 

643.01  Description.  This work consists of furnishing and applying polyester pavement markings according to Item 641, 740.01, 740.03, 740.09, and the additional requirements specified below.

643.02  Materials.  Furnish materials from the Department’s Approved List conforming to:

Polyester Pavement Marking................................... 740.03

Glass Beads, Type B............................................... 740.09

 

The Engineer may obtain random samples from the application equipment.  Furnish the manufacturer’s identification information for the sampled liquid materials.  The Department will test the quality assurance sample for conformance to the manufacturer’s production ranges.  Samples not meeting the manufacturer’s production ranges will require the Contractor to re-apply, at his expense, any markings using that sample.  All other untested batches will become not approved materials and will either require testing or re-application.

Do not apply material that have exceeded the manufacturer’s shelf life.  Do not use glass beads that are wet.

643.03  Equipment.  Use application equipment capable of mixing the polyester components in proportions recommended by the manufacturer and applying glass beads at the time of marking placement.  Use equipment (striper) capable of applying polyester long-lines at the thickness specified for solid and broken lines while moving on the highway at a speed of not less than 7 miles per hour (11 km/h).  Furnish a calibrated measuring device acceptable to the Engineer to measure the polyester resin in the striper tanks.

Equip all striping equipment for center line, lane line and edge line markings with a computerized Data Logging System (DLS) conforming to 641.04 when the length of marking exceeds 0.5 miles (0.8 km) of continuous line equivalent.  The DLS shall measure the polyester resin material component and glass beads only. Catalyst will be calculated as 2 percent of the resin used.

Furnish written documentation to the Engineer for the equipment’s operational capabilities from the equipment manufacturer. 

Furnish written documentation for the equipment’s operational capabilities from the equipment manufacturer.

643.04  Application.  Apply polyester only when the pavement surface is clean and dry and the pavement and air temperature are above 50 °F (10 °C). 

If project safety requirements require marking application below 50°F (10°C), obtain approval from the Engineer and apply cold weather traffic paint, Type 1A,as per Item 642 instead of the polyester.

After sampling of resin is completed, transfer the entire contents of each material container to the striper tanks.  Ensure that the polyester is thoroughly mixed at all times during application.  Apply polyester (catalyst plus resin) uniformly to the pavement at the following rates:

15 Mil Thickness

Line Width (inch)

4

6

8

12

24

Gallon per Mile of Line

Solid Line

16

24

32

48

96

Broken Line

4

6

8

12

24

Dotted Line

4

6

8

12

24

Areas, Symbols, Words

0.94 gallon per 100 square feet

 

0.38 mm Thickness

Line Width (mm)

100

150

200

300

600

Liter per Kilometer of Line

Solid Line

37

56

74

111

222

Broken Line

9.3

14

18.6

28

56

Dotted Line

9.3

14

18.6

28

56

Areas, Symbols, Words

 0.38 L/m²

 

Do not dilute the material.

Apply glass beads to the uncured polyester in sufficient quantity so that the beads completely fill the polyester film from the film-pavement interface to the top surface of the film to the extent that there are loose beads on the surface of the uncured line.  Apply glass beads at a minimum rate of 16.5 pounds per 100 square feet (8 kg per 10 m2) of polyester applied in a manner that provides uniformly retroreflective lines.

If the applied polyester becomes tacky and causes marking discoloration and darkening, cease marking application until the Inspector agrees that the problem is corrected.

If any marking is in a tracking condition 45 minutes after application, cease marking application until the Inspector agrees that the problem is corrected.

Do not apply polyester pavement markings to new asphalt concrete until at least 2 weeks after the pavement is placed.  Assure curing compound is removed from portland cement concrete pavements.

Replace unsatisfactory markings as per 641.11.

Furnish the Engineer daily, biweekly and final DLS reports as per 641.04.

643.05  Basis of Payment.  The Department will pay for accepted quantities at the contract prices, or prices adjusted according to 641.11, measured according to 641.12, with the provisions specified in 641.13, and as follows:

Item           Unit                                Description

643            Mile (Kilometer)          Edge Line

643            Mile (Kilometer)          Lane Line

643            Mile (Kilometer)          Center Line

643            Foot (Meter)                 Channelizing Line

643            Foot (Meter)                 Stop Line

643            Foot (Meter)                 Crosswalk Line

643            Foot (Meter)                 Transverse/Diagonal Line

643            Foot (Meter)                 Curb Marking

643            Square Foot                  Island Marking (Square Meter)

643            Each                               Handicap Symbol Marking

643            Each                               Railroad Symbol Marking

643            Each                               School Symbol Marking, ___ inch (___ mm)

643            Foot (Meter)                 Parking Lot Stall Marking

643            Each                               Lane Arrow

643            Each                               Word on Pavement, ___ inch (___ mm)

643            Foot (Meter)                 Dotted Line, ___ inch (___ mm)

643            Foot or Square Foot      Removal of Pavement Marking

                                                           (Meter or Square Meter), or Each

643            Lump Sum                    Two-Way Radio Equipment