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Troubleshooting

 

1) Color

  • Yellow becomes greenish yellow
  • White becomes dirty white

Causes

  • Over heating of material
  • Mixing of old and new material;

Solution

  • Control heating temperature between 180 – 200°C.
  • Do not melt the material inside the Preheater very long [Not more than 3 Hours]
  • Empty the Preheater content and put new material if color change occurs.

 

 

2) Peeling off due to less adhesion

Causes

  • Moisture, Grease & Oil Stuck on the Surface
  • Too dry prime coat

Solution

  • Clean road surface from dust, moisture, grease and oil properly.
  • Wait for the right timing between the wetness and the dryness of prime coat before applying the Thermoplastic. Stick finger tip to the prime coat surface, if it’s almost dry but still sticks to finger tip, then that’s the best time to apply the melted Thermoplastic

 

 

3) Poor reflectance at night and wet road condition

Causes

  • Uneven or insufficient dispersion of glass beads
  • Weak adhesion of glass beads on marking strips

Solution

  • Adjust the dispersing rate of the glass beads dispenser.
  • Check the sufficiency of the glass beads in the glass beads box.
  • Try to install the chain driven glass bead dispenser for uniform sufficient dispensing of glass beads.

 

4) Hollow craters on strip surface

Causes

  • Wet prime coat upon application of melted Thermoplastic.
  • Wrong viscosity of the molten thermoplastic causing uneven amount
  • Road surface temperature is below 10°C

Solution

  • Melt the Thermoplastic to the required temperature.
  • Adjust screeding shoe opening to suit viscosity

 

 

5) Cracks reaching the road surface

Causes

  • Cracks on some portion of the road surface.
  • Thermoplastic is too hard and cannot cope with the softer asphalt road surface.
  • Uneven thickness causing some portion to crack on heavy traffic

Solution

  • Adjust the viscosity of the Thermoplastic to increase its flexibility by controlling the temperature using thermometer.
  • Calibrate the thermometer at regular intervals.
  • Apply uniformly and evenly.
  • Apply drop on Glass beads to cover small cracks on the line film of Thermoplastic.

 

 

6) Tiny holes on thermoplastic strips

Causes

  • High melting and applying temperature
  • Expanded air inside open void of the road break through the wet Thermoplastic.
  • Road surface temperature is below 10°C.

Solution

  • Lower the temperature of the Thermoplastic.
  • Apply drop on Glass beads to cover pin holes and other line defects.
  • Use road heater equipment to warm the road surface before applying the melted Thermoplastic if the road surface temperature is below 10°C.

 

 

7) Scattering of excess thermoplastic material at sides

Causes

  • Over melting temperature than the required standard temperature.

Solution

  • Reach the required standard melting temperature and maintain this temperature then apply the melted Thermoplastic

 

8) Open, deep and long groves on surface of thermoplastic strips

Causes

  • Screeding shoe discharge point is choked with hardened Thermoplastic solids and foreign solid particles

Solution

  • Check the filter sieve.
  • Get rid of the foreign matters like small solid particles.
  • Clean and sharpen the screeding shoe blade.

 

9) Tiny bubbles popping up on surface of thermoplastic strips

Causes

  • Insolated moisture evaporates & expands inside wet concrete.
  • Evaporation and expansion of moisture under road surface.
  • Solvent evaporates from wet prime coat.
  • Road surface temperature is lower than 10°C.
  • High melting and application temperature.

Solution

  • Apply Thermoplastic if the concrete is properly aged (wait for 2 weeks or more).
  • Calibrate the thermometer at regular intervals.
  • Allow moisture to dry completely (new asphalt wait for 1 week or more).

 

10) Black spots on surface of thermoplastic strips

 Causes

  • New asphalt road surface not properly aged.

 Solution

  • Wait for one week after workup of new bitumen surface. Let traffic move for some time before applying thermoplastic.

 

11) Small solid particles found in melted thermoplastic material and   thermoplastic strip after application

Causes

  • Wrong melting temperature.
  • No strainer used while transferring melted material from preheater to applicator machine tank.
  • Over loading of preheater more than 80% of its capacity and non-uniform agitation of material in preheater.

Solution

  • Load materials 80% of the preheater tank capacity and stir constantly while melting and before application.
  • Use strainer to transfer melted materials to the applicator machine.

 

12)Wavy and irregular edges

Causes

  • Flow-out of material. Edge is not well defined, caused by material being too hot or too liquid, application pressure being too high, screed gate open too wide, and/or surface being too uneven.

Solution

  • Make sure temperature is 180 – 200°C and decrease application speed on rough surface.
  • Make sure that the thickness is not more than specified thickness.

 

13) Smooth shiny glossy thermoplastic strips

Causes

  • No Glass Beads, resulting in no retro-reflectivity caused by malfunctioning gun or Glass Beads sinking too deep.
  • Drop-on Glass Beads sunk too low, resulting in lower retro-reflectivity, caused by material being too hot.
  • Glass Beads not adhered well, will wear off quickly, caused by too cold material or bead gun being positioned too far from application point.

Solution

  • Repair Glass Beads Dispenser. Align glass beads dispenser closer to the screed.
  • Calibrate the thermometer at regular intervals.
  • Maintain applcaton temperature between 180 – 200°C.

 

 

Services


Certification

  • Title : ISO 9001 2000 Certification
    Images :
    Description :

    ISO 9001 2000 Certification

  • Title : ANACON LABORATORIES, NAGPUR
    Images :
    Description :

    ANACON LABORATORIES, Nagpur is a NABIL accredited analytical testing laboratory and now a leading Environmental Consultancy firm in Central India region

  • Title : NATIONAL TEST HOUSE
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    Description :

    National Test House, Delhi Kolkata and Mumbai, is largest multi-location, multi-disciplinary industrial testing laboratory in India.

  • Title : ANU LAB, AGRA
    Images :
    Description :

    Anu Lab, Agra is a NABL accredited testing laboratory Aand the most technically advanced engineering laboratories in India offering a full range of testing and analytical services.

  • Title : Ministry of Roads, Republic of Kenya
    Images :
    Description :

    Ministry of Roads, Republic of Kenya, also approved the Thermoplastic Road Marking Material confirming KS : 2157 standards.