METHODOLOGY TO BE ADAPTED BY ROAD PATTA FOR THERMOPLASTIC ROAD MARKING ON BITUMENOUS SURFACE
- Plotting of points on the carriageway for centreline and edge line markings as directed by the Engineer / Consultants.
- Scrubbing of road surface with wire brush to remove dust from road surface.
- Blowing of the removed dust from the surface with air – compressor.
- Pre-marking of centreline / edge line / Kerb line using string and chalk method.
- 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. - The machine to be used on the project: Hand-Push Machine or Fully Automatic Machine
- 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.
- The molten thermoplastic material is transferred from the pre-heater to the thermoplastic road marking machine.
- Temperature of the material is maintained in the applicator machine.
- 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. - The carriageway with marking completed is opened for traffic after required drying time of application and proper setting of thermoplastic material.
- 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. - 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
- Plotting of points on the carriageway for centreline and edgeline markings as directed by the Engineer / Consultants.
- Marking of centreline / edgeline using string and chalk method.
- Manual brushing of road surface with wire brush to remove the dust from the surface.
- Application of Primer on concrete road surface by Spray Machine or by Brush.
- Start thermoplastic application only after 60 to 90 minutes after application of primer, so that Primer gets dry and set on the Concrete Surface.
- 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.
- The molten thermoplastic material is transferred from the preheater to the applicator machine.
- 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.
- The road marking is opened to traffic after two hours of application and proper setting.
- 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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