CATEGORY 500 PAVING SECTION 555 — THERMOPLASTIC PAVEMENT MARKINGS - 40 MIL HIGH BINDER
555.01 Description
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.
555.02 Materials
Thermoplastic Pavement Markings — High-binder 951.05 Glass Beads 951.09 High Binder Thermoplastic is a durable material. Select High Binder Thermoplastic from the Qualified Products List (QPL).
555.03 Construction
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 Equipment.
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 Board of Fire Underwriters (NBFU), the National Fire Protection Association (NFPA), and State and local authorities. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
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 in. 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 F 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 Administration. 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 ft 2.
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 Contractor. In addition, the current road-users fee will be applied if traffic disruption occurs during corrective actions. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS 556 — PREFORMED THERMOPLASTIC PAVEMENT MARKINGS CATEGORY 500 PAVING SECTION 556 — PREFORMED THERMOPLASTIC PAVEMENT MARKINGS
556.01 Description
Furnish and install preformed thermoplastic pavement marking symbols, legends, and lines as specified in the Contract Documents and as directed.
556.02 Materials
Preformed Thermoplastic is a durable pavement marking material. Select preformed Thermoplastic Pavement Marking material from the Qualified Products List (QPL). Preformed Thermoplastic Pavement Marking Material 951.06
556.03 Construction
Refer to 549.03.
556.03.01 Quality Assurance/Quality Control. Refer to 549.03.01, 549.03.02.
556.03.02 Clean Pavement Surfaces. Refer to 549.03.07. 556.03.03 Application. Apply markings at the location, size and width as specified and as
directed. Use equipment recommended by the thermoplastic manufacturer. Preheat pavement surfaces when recommended by the manufacturer. Apply heat to the surface of the placed thermoplastic according to the manufacturer’s recommendations. Do not apply longitudinal or transverse pavement markings over longitudinal joints; offset 2 in. and as directed. Preheat pavement surfaces and heat the thermoplastic so as to not damage any joint filler. Protect adjacent marking materials from damage when preheating the pavement or heating the thermoplastic by shielding or setback methods. Preformed Thermoplastic Pavement Markings shall conform to the following:
a.Temperature. Apply preformed thermoplastic when the thermoplastic, ambient, and surface temperature, and relative humidity conform to the manufacturer’s recommendations. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
Source: Maryland Standard Specifications for Construction and Materials, 2025 Edition. Pages 743–745 of 1,113.