555 THERMOPLASTIC PAVEMENT MARKINGS-40MIL HIGH BINDER
From MDOT Policy Manual
- Furnish and install high binder, thermoplastic pavement markings as specified and as directed. The markings shall conform to pavement contours and be resistant to deformation by traffic and damage from snow removal equipment. The material shall cure at a rate that allows the markings to be ready for traffic immediately after application.
- High Binder Thermoplastic is a durable material. Select High Binder Thermoplastic from the Qualified Products List (QPLQualified Products List Award—The decision by a procurement agency to execute a purchase agreement or Contract after all necessary approvals have been obtained.).
- Refer to 549.03.
- 555.03.01 Quality Control. Refer to 549.03.01.
- 555.03.02 Quality Assurance. Refer to 549.03.02.
- 555.03.03 Cleaning Pavement Surfaces. Refer to 549.03.07.
- 555.03.04 Quality Control Test Strip. Refer to 549.03.09.
- 555.03.05 Application EquipmentAll machinery, tools, and apparatus necessary for the proper construction and acceptable completion of the work, together with the necessary supplies for upkeep and maintenance..
- (a) Kettles. Use equipment that has oil or air jacketed kettles for uniform melting and heating of the thermoplastic material; is equipped with an automatic thermostatic device to provide positive temperature control; and conforms to the requirements of the National BoardThe Board of Public Works of the State of Maryland. of Fire Underwriters (NBFUNational Board of Fire Underwriters), the National Fire Protection Association (NFPANational Fire Protection Association), and State and local authorities.
- (b) Agitation. Use equipment that provides continuous mixing and agitation of the material in the kettle, that is constructed so that all mixing and conveying parts, up to and including the application apparatus, maintains the material at the specified temperature; and is constructed to prevent clogging and accumulation of conveying parts of the applicator between the reservoir and the application apparatus.
- (c) Capacity. Use vehicle mounted equipment capable of holding a minimum of 600 lb of molten thermoplastic material for longitudinal line application.
- (d) Temperature Gauges. Use temperature gauges that have been calibrated every six months and submit a copy of the calibration certification as part of the QCP.
- (e) Footage Counters. Use calibrated footage counters to measure pavement markings and submit notarized certification as part of the QCP.
- (f) 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 daily.
- (g) Bead Dispenser. Use a pressurized bead dispenser or other mechanical method not dependent upon gravity for uniform application of glass beads for each individual material dispenser.
- (h) Material Dispenser. Use equipment capable of applying longitudinal markings at multiple width settings ranging from 5 to 12 in. as demonstrated by the quality control strip and as specified. Reapply the quality control strip whenever the guns are repositioned or adjusted after the initial quality control strip.
- (i) Maneuverability. Use a vehicle that is mobile and maneuverable enough to produce straight lines, standard curves true arcs, and capable of cleanly cutting off stripe ends.
- (j) Cleanliness. Thoroughly clean all parts of the equipment foreign material or different colored material prior to the introduction of a new batch of material.
- 555.03.06 Application. Use vehicle mounted equipment to apply markings in conformance with the manufacturer’s recommendations at the location, size and dimension as specified and as directed. Avoid application of line markings over longitudinal joints. Apply to bare asphalt pavement, existing thermoplastic or pavement marking paint as determined.
- Use small spray equipment to apply markings to gore areas, crosswalks, small intersections, roundabouts, wide markings, transverse markings and other areas that preclude the use of vehicle mounted requirement. The use of extrusion equipment is prohibited.
- (a) Ambient Conditions. Apply material when the ambient and surface temperatures are at least 50 F and rising at the time of application.
- (b) Moisture in Pavement. MSMT 729. Do not apply material if test is positive for moisture.
- (c) Temperature. Apply material when the molten material temperature is between 350 and 390 F unless otherwise recommended by the manufacturer and as approved.
- (d) Primer. Use a primer if thermoplastic is applied to portland cement concrete. Use a primer that is compatible with the thermoplastic material and recommended by the thermoplastic manufacturer.
- (e) Thickness. MSMT 729. The pavement markings shall yield a solid thickness of 40 ± 5 mils above the roadway surface. A five-inch line should yield approximately 585 ft/100 lb of material when compared to the distance striped. Material usage will be tracked by the AdministrationShall mean any one of the Administrations within the Maryland Department of Transportation, as listed in GP 1.02.. Low yields will be considered sufficient cause for restriping.
- (f) Glass Beads. MSMT 729. Apply standard glass beads uniformly to the surface of the molten thermoplastic at the minimum rate of 10 lb/100 ft2.
- (g) Color. MSMT 729.
- (h) Retroreflectance. MSMT 729. The minimum retroreflectance shall be 150 millicandelas/lux/square meter for yellow and 250 millicandelas/lux/square meter for white.
- 555.03.07 Curing. Refer to 549.03.10.
- 555.03.08 Observation Period. Refer to 549.03.11.
- 555.03.09 Submittals. Supply MSDS, Product Data Sheets, and QCPs.
555.04 MEASUREMENT AND PAYMENT.
- Payment will be full compensation for furnishing and placing of all materials, and for all labor, equipment, tools, testing, pavement preparation, and incidentals necessary to complete the work.
- High Binder Thermoplastic Pavement Markings will be measured and paid for per striped linear foot for the color and width specified.
- 555.04.01 Removal, Replacement, or Corrective Actions. Any additional cost for removal, including Maintenance of Traffic (MOT) shall be the responsibility of the ContractorAny person having a Contract with a procurement agency. Contractor does not include an employee with an employment Contract, or an employee organization with a collective bargaining agreement.. In addition, the current road-users fee will be applied if traffic disruption occurs during corrective actions.