(Soil Pavements)| SF-Sand is a mixture of soils (sand, granite soil) and urethane resin binder, a natural colored landscaping pavement material taking advantage of soft coloring of soil. Promenade in the remains of Jyohmon era in San-nai Aomori-> |  | |
- As the color is just like the used soil, a pavement of matching the natural environment is realized.
- As some free soil grains remain after opening for use, appearence is just like natural soil.
- As it is water permeable, no puddle is generated in the time of rains.
- Pot holes in winter season are hard to be generated. Moreover, almost no corrosion of soils occurs.
- With adequate hardness, feeling of foot touchs is soft.
| - Walking lanes
foot paths, lanes in parks and garden.
courses for jogging
- Peripherals of Buildings
Peripherals of
schools, residences and housing-developments.
| |
| Typical Properties of SF-Sand | |
| Test Item | Specific Value | SF-Sand | Remarks |
|---|
| Permeablility test | permeablility coefficient cm/sec | 8.9x10-4 | fine graded mixture 2.1x10-6 | | Skid test | BPN method | wet | 76 | spec. for footpath of Tokyo 45 or more
fine graded mixture wet 62
dry 78 | | dry | 92 | | Shock absorption test | Golf ball rebound coefficient % | 18 | fine graded mixture 75 | | Elastic rebound test | Steel ball rebound test % | 4 | fine graded mixture 2 | | Proctor needle test | resistance value LB | 100 | clay ground of schools 30-90 | | Density | density g/cm3 | 1.65 | w | | Remarks: The tests are executed after 14 days after construction. |
Typical Structure for places with no vehicle traffic
(unit: mm) | |
 In snowy cold areas, frost protective layer is laid
under the crushed stone basecourse. |  | |
 | | Typical structure for places with light vehicle traffic (unit: mm) | |
 <-- spreading mixture | |
|