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PMB
PMB is manufactured according to IS 15462: 2019.
Polymer Modified Bitumen (PMB) is produced by blending bitumen with polymers to enhance its mechanical properties such as elasticity, resistance to deformation, and improved durability. PMB is ideal for high-traffic roads, airports, and other demanding environments. It is commonly used in the construction of pavements, bridges, and roofing.
Specifications for PMB
| S. No. | Designation | PMB 120 | PMB 70 | PMB 40 | Test Method |
|---|---|---|---|---|---|
|
1 |
1 Penetration at 25°C (1/10mm, 100g, 5 sec) |
90-150 |
50-90 |
30-50 |
ASTM D5 |
|
2 |
Softening Point (R&B), °C, Min |
50 |
55 |
60 |
ASTM D36 |
|
3 |
Elastic Recovery at 15°C, %, Min |
60 |
60 |
60 |
ASTM D6084 |
|
4 |
Flash Point, COC, °C, Min |
220 |
220 |
220 |
ASTM D92 |
|
5 |
Separation, Difference in Softening Point, °C, Max |
3 |
3 |
3 |
– |
|
Thin Film Oven Test & Test on Residue |
|
|
|
|
|
|
6 |
Loss in Mass, %, Max |
1.0 |
1.0 |
1.0 |
ASTM D1754 |
|
7 |
Reduction in Penetration of Residue at 25°C, 100g, 5s, %, Max |
35 |
35 |
35 |
ASTM D5 |
|
8 |
Increase in Softening Point, °C, Max |
7 |
6 |
5 |
ASTM D36 |
|
9 |
Elastic Recovery at 25°C, %, Min |
50 |
50 |
50 |
ASTM D6085 |
Applications of PMB
- Road Maintenance (Highways, roundabouts)
- Bridges (Flexibility to endure expansion and contraction)
- Airport Runways (Heavy-duty traffic and extreme weather conditions)
- Roofing (As a waterproofing agent)
- Tunnels, Race Tracks (High-performance and durability)
