Methodology

METHODOLOGY TO BE ADAPTED BY ROAD PATTA FOR THERMOPLASTIC ROAD MARKING ON BITUMENOUS SURFACE
  1. Plotting of points on the carriageway for centreline and edge line markings as directed by the Engineer / Consultants.
  2. Scrubbing of road surface with wire brush to remove dust from road surface.
  3. Blowing of the removed dust from the surface with air – compressor.
  4. Pre-marking of centreline / edge line / Kerb line using string and chalk method.
  5. Simultaneously while the above activities are being carried out, thermoplastic material is heated in oil jacketed pre-heater fitted with hydraulic stirring
    arrangement. The thermoplastic material in the pre-heater is heated up to 180°C. The temperature is checked using an electronic temperature meter.
  6. The machine to be used on the project: Hand-Push Machine or Fully Automatic Machine
  7. The centre lines, pedestrian crossing etc. would be marked by hand-push machine or Fully Automatic Machine in view of the traffic flow on 10 Mtr. Road.
  8. The molten thermoplastic material is transferred from the pre-heater to the thermoplastic road marking machine.
  9. Temperature of the material is maintained in the applicator machine.
  10. The material is screeded out from the machine through the heated shoe at a thickness of 2.5 mm. Drop on glass beads at a quantity of 300 gm/m² [including
    wastages due to wind pressure] are dispensed on the surface of this screeded thermoplastic marking. The dispensing of glass beads is irrespective of speed
    due to chain drive mechanism.
  11. The carriageway with marking completed is opened for traffic after required drying time of application and proper setting of thermoplastic material.
  12. The pedestrian marking would be done by hand-push manual machine. When the application cannot be done using the machines, approved manual methods shall be
    used e.g. for Arrows etc.
  13. Following quality checks are carried out during marking each day:
    a. Temperature of material during application by digital temperature meter – Every batch of material applied.
    b. Thickness of material applied – Once in a day
    c. Quantity of drop on glass beads being applied – Once in a day
    d. Embedment of drop on glass beads by using magnifying glass – 2 times.
    e. Visual inspect ion of night time reflectivity – Daily.
METHODOLOGY TO BE ADAPTED BY ROAD PATTA FOR THERMOPLASTIC ROAD MARKING ON CONCRETE SURFACE
  1. Plotting of points on the carriageway for centreline and edgeline markings as directed by the Engineer / Consultants.
  2. Marking of centreline / edgeline using string and chalk method.
  3. Manual brushing of road surface with wire brush to remove the dust from the surface.
  4. Application of Primer on concrete road surface by Spray Machine or by Brush.
  5. Start thermoplastic application only after 60 to 90 minutes after application of primer, so that Primer gets dry and set on the Concrete Surface.
  6. Thermoplastic material is heated in a oil jacketed preheater fitted with hydraulic stirring arrangement. The thermoplastic material in the preheater is heated up to 180°C. The temperature is checked using a electronic temperature meter.
  7. The molten thermoplastic material is transferred from the preheater to the applicator machine.
  8. The material is screeded out from the machine through the heated shoe at a thickness of 2.5mm. Drop on glass beads at a quantity of 300 gms/m² are sprinkle on the surface of this screeded thermoplastic marking.
  9. The road marking is opened to traffic after two hours of application and proper setting.
  10. Following quality checks are carried out during marking each day:
    a. Temperature of material during application by digital temperature meter – Every batch of material applied.
    b. Thickness of material applied – 3 times.
    c. Quantity of drop on glass beads being applied – 2 times.
    d. Embedment of drop on glass beads by using magnifying glass – 2 times.
    e. Visual inspection of marking during nighttime for adequate reflectivity – 1 time.

 

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