Polymer Modified (PMB)

 

Enhanced with polymer additives, PMB exhibits superior performance characteristics such as improved elasticity, resistance to rutting and cracking, and enhanced durability. It is commonly used in high-stress road applications and for specialized pavement designs.

 

  • Styrene Butadiene Styrene (SBS) Modified Bitumen: Offers enhanced elasticity, durability, and resistance to cracking, suitable for high-stress road applications and extreme climates.
  • Ethylene Vinyl Acetate (EVA) Modified Bitumen: Provides improved workability, flexibility, and adhesion, commonly used in warm mix asphalt and pavement overlays.
  • Thermoplastic Polyolefin (TPO) Modified Bitumen: Offers superior weather resistance, UV stability, and fatigue resistance, ideal for roofing membranes and waterproofing systems.

 

Application

  • Road Construction: PMB is widely used in road construction projects as a high-performance binder in asphalt mixes for highways, urban roads, and airport runways.
  • Asphalt Pavements: It is commonly utilized in the production of hot mix asphalt (HMA) for surfacing roads, parking lots, driveways, and other paved areas.
  • Heavy Traffic Areas: PMB is preferred for roads experiencing heavy traffic loads and high temperatures due to its superior resistance to rutting, fatigue cracking, and deformation.
  • Extreme Conditions: It is applied in regions with extreme climatic conditions such as high temperatures, freeze-thaw cycles, and heavy rainfall, providing enhanced durability and longevity.
  • High Stress Applications: PMB is used in special pavement applications such as bridge decks, intersections, and roundabouts where increased resistance to rutting and fatigue is required.
  • Pavement Preservation: PMB is used in pavement preservation treatments such as thin overlays and surface rejuvenation to extend the service life of existing asphalt pavements.
No.
Test Type
Specifications for Type II PG 70 &76 Modified Asphalt
Test Method
Test results
PG70 PG76 PG 70&76
Original Binder
1 Penetration on 25 °C, 0.1mm Reported Reported ASTM D5 41
2 Softening Point, °C Reported Reported ASTM D36 59
3 Flash Point (COC), °C ≥ 230 ≥ 230 ASTM D92 332
4 Ductility, Cm ASTM D113 96
5 Solubility in Trichloroethylene, % ≥ 99 ≥ 99 ASTM D2042 99.1
6 Specific Gravity of Hard Bitumen, gr/ml ASTM D70 1.014
7 Storage Stability (Softening Point Diff.), °C ≤ 2.2 ≤ 2.2 ASTM D 5976-87 1.8
8 Kinematic Viscosity at 135°C, Cst ≤ 3000 ≤ 3000 AASHTO T316-13 1191
9 DSR Original Binder Fail Temperature, °C Min 70 Min 76 AASHTO T 315-12 76.5
After RTFO Test
1 Weight Loss (RTFOT), % ≤ 0.8 ≤ 0.8 AASHTO T240 0.07
2 Penetration Return at 25°C after RTFOT, % ≥ 54 ≥ 54 ASTM D5 73
3 Ductility after RTFOT, Cm ≥ 50 ≥ 25 ASTM D113 59
4 DSR (RTFOT) Fail Temperature, °C Min 70 Min 76 AASHTO T 315-12 76
5 DSR MSCR (RTFOT) (Jnr 3.2) at 70ᴼC AASHTO T350-14 1.38
6 DSR MSCR (RTFOT) (Jnr diff) at 70ᴼC AASHTO T350-14 80.3
After PAV Test
1 DSR PAV @ 5000 kPa Fail Temperature, °C Max 31 Max 34 AASHTO T 315-12 28