W-Mastic Type I is a gap graded modified asphalt mixture in which plant fibers are added.| The characteristics are that it contains more coarse aggregates (70% - 80%) and more binder (5.5% - 7.0%). Due to these characteristics, coarse aggregates form tight skeleton as shown in the figure below in the compacted mixture filled with asphalt mortar in the voids, thus this mixture have the performance featured by all of water protectivity, high flexibility, rutting resistance, raveling resistance. |  | |
 | - Excellent at raveling resistance and flexibility and cracks are hard to be generated.
- Excellent at durability and water protectivity.
- Excellent at rutting resistance.
- Having rough surface texture, skid resistance is large.
- As the modifier and plant fiber are mixed at mixing plant, small amount of production is possible>
| |
- For surface course and binder course on concrete slabs on bridges with large span where large deformation and vibration is estimated.
- For places where raveling resistance is required.
- For places where reflection cracking is afraid of.
| Between
mankind
and
earth
WatanabeSato
is there. | |
| Fig. 1 Result of Wheel-Tracking Test 
| Fib. 2 Result of raveling Test 
| |
| Low Temperature Flexibility | |
Fig. 3 Result of Flexural Test
(-10°C below 0)
| Fig. 4 Result of Permeability Test | |
| Properties at Marshall Tests | |
Table 1 Results of Marshall TestsOptimum
binder content
(%) | Density (g/cm3) | voids (%) | Satu-
ration(%) | Sta-
bil-
ity
(kg) | Flow
1/
100
cm | | 6.1 | 2.426 | 3.0 | 83.0 | 785 | 41 | |
| Fig. 5 Standard Gradation | |
| 
