Extra Durable PavementW-Spax is a mixture which was developed for protecting the rutting and corrugation (plastic flow) difficult to be solved by ordinary asphalt mixtures and for protecting the raveling in snowy cold areas.
As modifier for this mixture, there are two kinds of modifier namely C-100 (for use to rutting resistance) and C-200 (for use to raveling resistance). Both of them are chloroprene co-polymer. |  | |
- As the modifier is added at mixing plant, small amount of production is possible.
- The modifiers are emulsified and easy to handle.
- The mixture shows no sticking and spinning phenomenon, so do not stick to neumatic tires.B
- Excellent at rutting resistance at high temperature. (C-100)
- As the modified binders are excellent at adhesivity to aggregates, the mixtures are excellent at raveling resistance and crack resistance at low temperature. (C-200)
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(In case C-100 modifier is used)- For heavily trafficked roads and for sections of roads where braking of vehicle are frequent.
and for roads heavy vehicle traffic is large, intersections, bus stops, slopes and etc. - For pavements where specially heavy vehicle loads are estimated.
Truck terminal, yards in factories, container yards, airports and etc.
| (In case C-200 modifier is used)- For snowy cold areas.
Roads where raveling by tire chains are estimated. - For pavements where large deformation and vibration are estimated.
Decks of bridges (steel decks, (reinforced concrete slabs and etc.).
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| Fig. 1 Result of Wheel Tracking Test 
Fig. 2 Rusult of raveling Test 
| Flexibility at Low Temperature | |
Table 3 Result of Flexural Test (at -10°C below 0)| Kind of Mixture | straight
asphalt
80 - 100 | Modified Type I
10% added | W-Spax
C-100 8% added | | Strain at fracture | 3.0x10-3 | 4.5x10-3 | 7.5x10-3 | | Remarks | The mixture is dense graded
finer graded
top size: 13 mm | |
| Table 1 An Example of Binder Properties| Item Kind | Straight
asphalt | C-100 8%added | C-200 8%added | Standard of Modified Type II | Penetration (at 25)
1/10mm | 68 | 60 | 64 | >=40 | Softening
point | 48.0 | 61.5 | 57.0 | 56.0 - 70.0 | Ductility
(at 15°C) cm | >=150 | 74 | 95 | >=30 | | Flash point | >=330 | 339 | 339 | >=280 | | Ratio of mass change after TFOT (%) | +0.03 | +0.03 | +0.03 | =<0.5 | | Ratio of residual penetration after TFOT | 62.8 | 73.1 | 76.2 | >=65 | Toughness
kgf.cm | 62 | 250 | 229 | >=80 | Tenacity
kgf.cm | 15 | 196 | 176 | >=40 | |
| Properties of Marshall Tests | |
Table 2 Marshall Properties| Mixture | Dense Graded Mixture
top size 13 mm | Dense Graded Gapped Mixture
finer graded
top size:13 mm | Kind of Binder
and Standards | W-Spax
C-100
8% | standard
value | W-Spax
C-200
8% | standard value | Optimum
binder
content(%) | 5.7 | - | 5.7 | - | | Density % | 2.387 | - | 2.432 | - | | | Air void % | 4.0 | 3`6 | 3.5 | 3 - 5 | | Saturation % | 76.9 | 75 - 85 | 76.2 | 75 - 85 | | Stability kg | 1340 | >=750 | 1050 | >=500 | | Flow 1/100cm | 29.0 | 20 - 40 | 34.0 | 20 - 40 | |
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