Road Marking Removal Specification using Ultra High Pressure Water
Part 1 - General
- 1) Description of Work: The work consists of providing all labour,
traffic control, material and equipment necessary to remove 100% of the
existing road markings from concrete, asphalt, tarmacadam and surface
dressed roads as indicated on the drawings and in these specifications
without damage to the surface using high-pressure water jets.
Part 2 - Materials
- 1) Water shall be potable water obtained from a fire hydrant, municipal source
or well. Lake or river water will not be allowed.
- 2) The use of chemicals, abrasive materials, grinders, detergents or salt water
will not be allowed.
Part 3 - Equipment
- 1) Road Marking removal shall be performed with engineer approved ultra-high
pressure water jetting equipment capable of removing 100% of the existing road
marking. The equipment shall be capable of operating at a minimum of 35,000-psi
water pressure with flow rates not exceeding 30 litres per minute. The equipment
used for the road marking removal shall be a self-propelled vehicle for long
lines with all functions programmable and repeatable. The removal head shall be
a minimum of 200mm wide and contain a minimum of 16 nozzles. The removal head
must be capable of rotating at a minimum of 1,500 rpm. The equipment shall be
capable of removing a minimum of 300 square metres per 8-hour shift.
- 2) The removal shall leave the surface clean and ready to accept a new road
marking if required.
- 3) Trolley mounted water jetting equipment shall be used to remove road markings
in areas inaccessible to the truck mounted equipment such as hatched areas,
letters, arrows and symbols. This equipment shall operate at a minimum of 35,000 psi and shall use a minimum of 16 nozzles. The nozzles shall rotate at a minimum
of 1,500 rpm.
- 4) All equipment shall be operated to remove road marking in the same direction
as the traffic flow.
Part 4 - Execution
- 1) The work shall be performed at the locations designated on the plans or as
directed by the engineer.
- 2) Remove 100% of the road marking deposits using ultra-high pressure water jets
without damaging the road surface.
- 3) Do not perform work unless the temperature is a minimum of 5ēC and rising and
the pavement temperature is a minimum of 0ēC and rising.
- 4) Road marking removal may be performed during inclement weather conditions.
- 5) Any damage to the pavement surface caused by the contractor’s operation shall
be repaired at the contractor’s expense. Prior to performing the repair, the
engineer shall approve repair methods and procedures.
Part 5 - Quality Control
A. Test Area
- 1) Prior to the start of the work the Contractor shall perform a test removal at
a location designated by the engineer of a minimum of 50 square metres to
demonstrate the quality of the road marking removal. The UHP pump shall be set
at optimal operating pressure and flow rate and the forward speed of the vehicle
adjusted to remove 100% of the road marking deposits.
B. Visual Inspection
- 1) The engineer shall determine by visual inspection if 100% of the road marking
deposits have been removed.
- 2) Visual inspection shall include a close inspection of the pavement surface to
determine if the water jet has contacted a minimum of 100% of the surface and
removed the road marking from that surface.
Part 6 - Method of Payment
- 1) The unit of measurement shall be a square unit of road marking
removed and accepted by the engineer.
- 1) Payment shall be made at the bill of quantity unit price for “Road
Road Marking Removal Using High-Pressure Water ________€/m˛