| Plant Fiber Added Asphalt Mixture | | FA-ToughCo |
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There are two types of rutting, one is seen in congested heavy duty roads and caused by flow of mixture and another is caused by raveling due to tire chains in winter season. Generally saying, a measure to eliminate one cause is likely to make the other cause severer.
FA-ToughCo is an asphalt mixture that solves these problems simultaneously by adding plant fiber (alpha-cellulose) to conventional asphalt mixtures. |  | |
- excellent rutting resistance at high temperature.
- excellent raveling resistance.
- excellent flexibility.
- the finished surface texture is fine as compared to mixtures with the same gradation.
- ordinary straight asphalt is sufficient (combined use with modifier is also possible)
| - the roads which must take into account of both raveling and rutting.
- pavements on bridges where deformation and vibration are problem.
- overlay on concrete slabs where reflection cracks are likely to be generated.
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Properties of Marshal Tests
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Optimum binder content is larger as compared to ordinary mixtures though stability and flow value are almost the same | Table-1 Results of Marshal Tests| Specific Value | Dense Graded
Asphalt Concrete
top size: 13 mm | FA-ToughCo | Remarks | | Density g/cm3 | 2.378 | 2.355 | content of plant fiber is 0.35 % weight of mixture | | Air voids % | 3.8 | 3.8 | | Saturation % | 77.2 | 78.0 | | Stability kg | 1360 | 1300 | | flow 1/100cm | 36 | 37 | | Optimum binder content % | 5.7 | 6.2 | | |
Dynamic stability is high and excellent at rutting resistance. |  | |
 | Abrasion loss is small and raveling resistance is excellent | |
| Flexibility at Low Temperature | |
The maximum strain at low temperature is large and it well accommodate deformation. |  | |
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