CPDA® has been used and proved its effectiveness through number of road construction projects Kazakhstan. Below, photographs are shown from the construction of the 16 km stretch of P-10 Southwest Nur-Sultan (Astana) Bypass, taken place in 2017. SMA20 mix has been used combined with the CPDA® additive.
Throughout the year, the road is affected by temperatures ranging from -40°C in winter to +35°C in summer. A major magistral for the heavt traffic, it's reaches an equivalent 13-ton axle load of 9000 vehicles / day. The inspection later took place and confirmed good surface condition without defects.
We further list completed and planned projects utilising the CPDA® additive.
| Project | Year | Length of section | Type of road surface | Temp. range | Equivalent 13-ton axle load (vehicle/day) | Inspection comments |
|---|
| Constructed |
|---|
| A-14 Taraz, KZ - Kyrgyzstan border | 2015 | 200m | Modified AC20 mix | -20°C to +40°C | 4000 | Good condition, no defects |
| P-4 Nur-Sultan - Pavlodar, Kazakhstan | 2017 | 17 km | Modified SMA20 mix | -35°C to +35°C | 6000 | Good condition, no defects |
| P-1 Beyneu, KZ - Uzbekistan border | 2017 | 75 km | Modified AC40 mix, topped by SMA20 mix | -20°C to +45°C | 4000 | Good condition, no defects |
| Under construction / planning |
|---|
| West Kazakhstan Region | - | ~ 270 km | Modified AC20 mix |
| East Kazakhstan Region | - | ~ 525 km | Modified SMA20 mix |
| Karaganda Region | - | ~ 250 km | Modified SMA20 mix |
Constructed
A-14 Taraz, KZ - Kyrgyzstan border
200m,
2015Temp. range: -20°C to +40°CEquivalent 13-ton axle load (vehicle/day): 4000Type of road surface: Modified AC20 mixP-4 Nur-Sultan - Pavlodar, Kazakhstan
17 km,
2017Temp. range: -35°C to +35°CEquivalent 13-ton axle load (vehicle/day): 6000Type of road surface: Modified SMA20 mixP-1 Beyneu, KZ - Uzbekistan border
75 km,
2017Temp. range: -20°C to +45°CEquivalent 13-ton axle load (vehicle/day): 4000Type of road surface: Modified AC40 mix, topped by SMA20 mixUnder construction / planning
West Kazakhstan Region
Length of section: ~ 270 km
Type of road surface: Modified AC20 mix
East Kazakhstan Region
Length of section: ~ 525 km
Type of road surface: Modified SMA20 mix
Karaganda Region
Length of section: ~ 250 km
Type of road surface: Modified SMA20 mix
Material properties were tested in independent labs against regulated standards (Republic of Kazakhstan RK TS 2373-2013 “Road and airfield stone mastic polymer asphalt concrete mixes, stone mastic polymer asphalt concrete”).
The tests compared CPDA to other polymer additives available on the market (stone mastic polymer asphalt mixes made in accordance with manufacturer instructions): Mix 1 PBV60, Mix 2 BUTONAL NS198, Mix 3 CPDA®
| Parameter | Regulated standard | Test results for each Mix |
|---|
| #1 PBV60 | #2 BUTONAL NS198 | #3 CPDA® |
|---|
| Porosity of the mineral part, % | 15.0-19.0 | 15.2 | 15.4 | 15.5 |
| Residual porosity, % | 2.0-4.5 | 4.02 | 4.12 | 4.14 |
| Water saturation by volume, % | 1.0-4.0 | 2.8 | 2.9 | 3.0 |
| Compressive strength, MPa | |
| at 20°C | No less than 2.8 | 4.06 | 4.01 | 3.97 |
| at 50°C | No less than 1.0 | 1.4 | 1.5 | 1.6 |
| Crack resistance, breaking strength, MPa at 0°C | 3.0-6.5 | 3.2 | 3.5 | 3.9 |
| Water resistance coefficient during long-term water saturation | No less than 0.85 | 0.89 | 0.9 | 0.95 |
| Binder running off capacity, % | No more than 0.2 | 0.09 | 0.1 | 0.1 |
| The average density of the compacted mixture, g/cm3 | Not standardised | 2.34 | 2.34 | 2.34 |
| Regulated standard | Test results for each Mix |
|---|
| PBV60 | Butonal NS198 | CPDA® |
|---|
| Porosity of the mineral part, % |
|---|
| 15.0-19.0 | 15.2 | 15.4 | 15.5 |
|
| Residual porosity, % |
|---|
| 2.0-4.5 | 4.02 | 4.12 | 4.14 |
| Water saturation by volume, % |
|---|
| 1.0-4.0 | 2.8 | 2.9 | 3.0 |
| Compressive strength, MPa at 20°C |
|---|
| No less than 2.8 | 4.06 | 4.01 | 3.97 |
| Compressive strength, MPa at 50°C |
|---|
| No less than 1.0 | 1.4 | 1.5 | 1.6 |
| Crack resistance, breaking strength, MPa at 0°C |
|---|
| 3.0-6.5 | 3.2 | 3.5 | 3.9 |
| Water resistance coefficient during long-term water saturation |
|---|
| No less than 0.85 | 0.89 | 0.9 | 0.95 |
| Binder running off capacity, % |
|---|
| No more than 0.2 | 0.09 | 0.1 | 0.1 |
| The average density of the compacted mixture, g/cm3 |
|---|
| Not standardised | 2.34 | 2.34 | 2.34 |
UK sets out a number of plans for Net Zero by 2050, to drive innovation accross multiple industries. As part of the Green Finance and Innovation significant funding is available to projects aimed the the carbon footprint reduction.
