Pavements
 Special Methods
  Mr. Yuhsetsu
   (Road Heating)
  Hydro-Milling
   by high pressure water
  Asphalt Injection
 Asphalt Pavement
 Concrete Pavement
 Semi-Flexible Pavement
 Functional Pavement
 Paving Materials
 Repair Materials
 Special Methods
 Recycling
Landscape Creation
 Saiga
  (natural pebble pavement)
 W-Wood
  (Wood Chips Pavements)
 W-Sand
  (Soil Pavement)
 CA-panax
   (Coloured Pavement)
 RP-pavement
   (semi-flexible pavement)
 W-Rolled
   (rolled asphalt pavement)
 Landscape Estimation
Pavements for Sports
 EXCELLENT Series
  SEMI-HARD
  HARD
 Soil Pavements
Building Construction
Laboratory
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By the Power of
Water
It enables Scraping of
  • Concrete Pavements
  • Bridge deck slabs
  • Walls of Buildings
    Over Flow Surface of Dams
  • Scraping of guss asphalt
    on steel decks
    and also Scaling of
  • The surface of concrete pavement which lost skid resistnce by ravelling.
  • The milling depth of concretes is adusted by the number of passes of nozzle.
  • The milling depth by one pass of machine can be up to 40 cm.
  • Clingings to re-bars are completely removed without damaging.
  • The weak part of concrtets are removed and the strengths of remaing part are uniform.
  • The adhesivity to new concrete is excellent.
  • Noise and dusst are mitigated as compared to conventional method.
High pressure is the conclusive factor
  It is achieved by tww X-Pump and ultra high pressure water injector for milling.
(1)Ultra high pressure generatior(Ｘ-Pump)		(2)Ultra high pressure water injector  It is consisted of working device which moves laterally ratating the nozzle and the tractor for movement.
Specifications
Diesel Engine
HP      402HP
Cooling Methodwater cooling
Pump
Injection pressure    34,000psi
(2380kgf/cm2)
Injection flow ratewater cooling
Ultra high pressure water injector
Moving speed of nozzle0 - 1500mm/sec (continuous speed change)
Operation widthmax. 3500mm
(25mm pitch)
Movement equipment (tractor)
movementhydraulic control: 0 - 5m/min (working time)
Steeringhydraulic control
Binding strength between existing concrete and new concreteIllustration of nozzle part

As the nozzle part rotates with high speed, milling the concrete below the re-bars is possible. And depending on the milling depth and the quantity of re-bars, 4 angles between 10° and 30° are selectable.


Milling of concrete pavement slab
The concretes around re-bars and tie-bars are cleanly removed.


Milling of the surface of concrete pavement
Removed are concrete with less than a atrength, forming a plane with a same strength. Without damaged part remainings, the resulting rough surface enhance the binding strength.

An Example of Surface Scaling of Concrete Pavement
The lower half part of the photo to the right is ravelled to smooth and slippery surface and the upper half part is scaled by hydro milling system to revive the skid resistance.
This operation is done by two set of ultra high pressure generator and a surface scaling equipment
ItemSpecification
Injection volume61 litre/min x 2 sets
Injection pressuremaximum 2,380 kgf/cm2
Operation widthmaximum 3,500 mm

Ultra high pressure water injector in operation

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