METHODOLOGY FOR ROAD MARKING

 

METHODOLOGY FOR ROAD MARKING

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1. Scope:

�   The work shall consist of marking traffic stripes using a thermoplastic compound meeting the requirements as shown in Drawings.

2. References:

�   MoRT & H specifications clause no 803 and Technical specifications of contract.

3. Equipments:

�   Thermo plastic material heating Equipment, Road marking machine, Total station.

4. Tools:

�   Measuring steel tape, line rope.

5. Responsibility:

�   Responsibility of Implementation of this procedure lies with Site engineer and in charge of Road section.

6. Materials:

~ Thermo plastic material as per clause No: 803.4.2, Glass reflectorizing beads Type 2 as per Clause No: 803.4.3.

7. Procedure:

�   The traffic will be diverted by placing proper safety barricades/safety cones/flag man.

~ Median and shoulder work shall be completed prior to Road marking.

~ The BC surface shall be thoroughly cleaned of all dust, dirt, grease, oil and all other foreign matter before application of paint.

·      The thermoplastic powder is put in to the container of machine and it is to be heated. The material is mixed uniformly by operating the mechanical agitator in the container. The thermostat is adjusted to a temp of 180-200⁰C. The material is added to the container to its full capacity and melted till it achieves smooth consistency.

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·       Thermoplastic materials shall be applied in hot condition either by screeding or extrusion process.

·       After transferring the thermoplastic paint to the laying apparatus, the material shall be laid at a temperature within the range of 180 to 200 degree centigrade.

·       The application properties of the thermoplastic material shall be such

that it shall readily get screeded or extruded at applied temperature.

·       The paint shall be applied with a thickness of 2.5 mm exclusive of

surface glass beads. The width shall be as per drawing.

·       The Glass beads shall be applied at the rate of 250 grams per square meter area.

·       The finished lines shall be free from ruggedness on sides and ends. The

upper surface of the lines shall be level, uniform and free from streaks.

·       Traffic shall be allowed after 60 minutes of application at specified

temperature.

8. Safety Requirements:

�   Wherever the road marking is under process the area shall be properly barricated.

�   The pavement temperature shall not be less than 10⁰C during application.

�   The thermoplastic material shall not be maintained in a molten condition for more than 4 hours.

�   All workmen shall be screened and trained.

�   All workmen at work area shall wear PPE^·s and reflective jackets.

�   During night work sufficient lighting shall be provided.