Improvement of Base Course and Sub-grade
Summary
Existing gravel in roads or cheap local materials can be mixed onsite with cement or lime and spread on the surface by a stabilizer used to make a strong and stable sub-grade or base course. Emulsified asphalt can be used as a building material with cement or lime.
Merit
- Effective use of existing soil and other materials not complying with standards.
- Dumping of waste is unnecessary. Simple work and shorter construction period makes this an economical method.
Use
- Base course improvement of gravel roads, sub-grade improvement of weak ground.
- Improvement of gravel roads in mountainous areas or remote islands, where transportation of base course material is difficult.
Past performance
National expressways, national highways, prefectural roads, municipal roads, grounds of firms, temporary roads, sports and recreational facilities.

CONSTRUCTION TECHNOLOGY
- A
-
- Ameni-Phalt S series
Low noise / Drainage Pavement - Asphalt Mastic
Underground Water Retaining Wall - Asphalt Revetment
Pavement of Dike Sloping - Automobile Proving Grounds/Bicycle Race Courses
Pavement of Straight and Curving Slopes-Lateral paving method
- Ameni-Phalt S series
- D
-
- Deep Stabilization
Improvement of Weak Sub-grade
- Deep Stabilization
- F
-
- Foamed Mastic Seal(FMS)
Hot-mix Surface Treatment - Foamed Stabilization
Mixed- On-Site Stabilization with Straight Asphalt
- Foamed Mastic Seal(FMS)
- H
-
- Hard Guss Asphalt
Guss Asphalt Pavement - HIGH SPEED TRACK
BANK PAVING SYSTEM
- Hard Guss Asphalt
- I
-
- Interlocking Block Pavement
Irregular-shaped Pavement
- Interlocking Block Pavement
- M
-
- Mini Road
Instant Paving Material
- Mini Road
- N
-
- ND-IT Construction System
ICT (Information Communication Technology) Construction System
- ND-IT Construction System
- O
-
- Omnicourt
Loose Lay Installation/Sand Fill System
- Omnicourt
- P
-
- Perfect-Bond Concrete Overlay Method
Surface treatment using water-ND Waterjet System - Permeable Color Pavement
Hot-mix Pavement - Poliment-Ultrapave
Pavement Resistant to Heat and Very Heavy Load of Multi-wheeled vehicles
- Perfect-Bond Concrete Overlay Method
- R
-
- Rainbow Brick
Varied Shape Color Tile Method - Rainbow Color Pavement
Kao Mat SK - Rainbow Color Pavement
Rainbow Color A - Rainbow Color Pavement
Rainbow Color E - Rainbow Color Pavement
Rainbow Color MH - R.C.C.P.
Roller Compacted Concrete Pavement - Recycle Stabilization
On-Site Recycling of Existing Pavement - Recycled Surface
On-Site Surface of Asphalt Pavement - Refresh Seal Mix
Hot Asphalt Surface Treatment Method - Refresh Seal Mix-H
Hot Asphalt Surface Treatment Method (Hard Type) - Road Planing
Cold Planing - Road Stabilization
Improvement of Base Course and Sub-grade - Rolled Asphalt
Pavement Resistant to Abrasion and Skidding
- Rainbow Brick
- S
-
- Safety Grooving
Grooving for Skid-resistance - Semi Hot Pave
Warm Mix Asphalt - SKID-PANEL
Pre-cast Low μ Road - Soft Step A
Acrylic Resin Type - Soft Step Grainr
Urethane Rubber Chip N and R Type - Soft Step Grainr
Urethane Rubber Chip P Type - Soft Step Master
Urethane Solid Type - Soft Step Pro
Soft Acrylic Resin Type - SPRINKLING NOZZLE
Sprinkling Nozzle for Proving Ground - Steel-Fiber-Reinforced Concrete(SFRC)
Steel-Fiber-Reinforced Concrete Pavement - Stone Mastic Asphalt
Abrasion-and-Flow Resistant Pavement
- Safety Grooving