What Is Plastomeric PMB (Polymer Modified Bitumen)? – Iran Bitumen Supply │ IBITMCO
Plastomeric PMB is a high‑performance Polymer Modified Bitumen produced by blending paving‑grade bitumen with plastomeric polymers, most commonly EVA (Ethylene‑Vinyl Acetate) or PE (Polyethylene). These polymers increase the binder’s stiffness, improve its resistance to deformation, and enhance its performance in hot climates and heavy‑load pavement structures. At Iran Bitumen Supply │ IBITMCO, Plastomeric PMB is engineered for applications where pavements must remain stable under high temperatures, heavy axle loads, and continuous stress. Unlike elastomeric PMB, which focuses on elasticity and recovery, Plastomeric PMB focuses on stiffness, rutting resistance, and high‑temperature stability. This makes Plastomeric PMB ideal for tropical climates, industrial pavements, container terminals, high‑load highways, and airport runways, where asphalt must resist permanent deformation. Plastomeric PMB is typically produced in the following internationally recognized grades: PMB 40, PMB 70, PMB 120.
These grades apply to both elastomeric and plastomeric PMB, but the polymer type determines the performance behavior:
- ✔ PMB 40 – Harder, stiffer grade for hot climates and heavy traffic
- ✔ PMB 70 – Balanced grade for moderate climates and general highways
- ✔ PMB 120 – Softer grade for cold climates and flexibility‑critical applications
Description of Plastomeric PMB – Iran Bitumen Supply │ IBITMCO
Plastomeric PMB is designed to deliver superior performance in environments where asphalt must resist rutting, shoving, and permanent deformation. The addition of plastomeric polymers forms a rigid, stable network within the bitumen, increasing its stiffness and improving its ability to withstand high temperatures. Unlike conventional bitumen, which softens significantly in hot weather, Plastomeric PMB maintains its structure and prevents pavement deformation. This makes it ideal for high‑temperature regions, industrial zones, and high‑load pavements where long‑term stability is essential. Plastomeric PMB also offers improved resistance to oxidation and aging, extending pavement life and reducing maintenance costs.
Applications of Plastomeric PMB
Plastomeric PMB is widely used in high‑temperature, high‑stress pavement environments. It is commonly applied in the construction of highways, expressways, and industrial roads where asphalt must withstand heavy axle loads and elevated temperatures. Its enhanced stiffness makes it suitable for container terminals, logistics hubs, airport runways, and bridge decks, where pavements are subjected to continuous loading and thermal stress. Plastomeric PMB is also used in waterproofing membranes, roofing systems, and industrial coatings due to its excellent heat resistance and durability.
Properties of Plastomeric PMB
Plastomeric PMB is characterized by its high softening point, increased stiffness, and excellent resistance to deformation. The plastomeric polymers increase the binder’s viscosity and improve its ability to withstand high temperatures without rutting. Its penetration value is lower than that of conventional bitumen, indicating a harder and more resilient binder. Plastomeric PMB also exhibits improved resistance to aging, oxidation, and UV exposure, making it suitable for long‑life pavement applications in warm climates.
Packing Options for Plastomeric PMB
At Iran Bitumen Supply │ IBITMCO, Plastomeric PMB is available in New steel drums, Bitubags, Bulk shipments via bitumen carriers, Tanker trucks for direct delivery to asphalt plants. These packaging options ensure efficient handling and uninterrupted supply for large‑scale infrastructure projects.
Difference Between Elastomeric PMB and Plastomeric PMB
Elastomeric PMB (SBS‑Modified)
- ✔ Highly elastic and flexible
- ✔ Excellent crack resistance
- ✔ Best for cold climates and high‑stress intersections
- ✔ Recovers shape after deformation
Plastomeric PMB (EVA/PE‑Modified)
- ✔ Stiffer and more rigid
- ✔ Superior rutting resistance
- ✔ Best for hot climates and heavy‑load pavements
- ✔ Does not recover shape like elastomeric PMB
In short:
- ✔ Elastomeric PMB = flexibility + elasticity
- ✔ Plastomeric PMB = stiffness + high‑temperature stability
They simply serve different climates and traffic conditions.
Specification of Polymer Modified Bitumen