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Performance-Grades-PG70-PG-70-28

Performance Grades

PG70 – PG-70-28

Petra Oil’s PG 70-28 is an ultra-high-performance asphalt binder specifically engineered for regions facing extreme temperature variation—from scorching summer heat to severe winter cold. Designed in full compliance with Superpave performance grading standards, PG 70-28 delivers superior long-term pavement durability by combining high resistance to rutting at elevated pavement temperatures (up to 70°C) with excellent low-temperature flexibility down to -28°C.

 

PG 70-28 is ideal for high-value roadway infrastructure that must endure heavy traffic loads and the most demanding climate conditions. With outstanding resistance to both thermal cracking and surface deformation, this binder offers dependable performance in the harshest environments—making it a preferred choice for northern regions, mountainous terrains, and areas subject to deep freeze-thaw cycles.

 

Manufactured to exceed AASHTO M320 requirements, PG 70-28 offers consistent quality and optimal binder behavior under thermal stress, ensuring reliable pavement performance and extended service life.

 

Key Specifications of PG 70-28:


• Performance Grade: PG 70-28
• High-Temperature Grade: 70°C
• Low-Temperature Grade: -28°C
• Standard Compliance: AASHTO M320
• Type: Superpave Performance Grade Asphalt Binder

 

Main Applications of PG 70-28:


• Cold Region Expressways: Built for roads exposed to intense cold and heavy traffic.
• Mountain Passes and High-Elevation Roads: Handles severe climate swings and steep gradients.
• Strategic Freight Corridors: Ideal for routes that require durable surfaces under year-round heavy loading.

 

Key Benefits of PG 70-28:


• Exceptional Low-Temperature Flexibility: Reduces risk of thermal cracking in extreme winter conditions.
• Superior Rutting Resistance: Maintains surface integrity under sustained high temperatures and loading.
• Long-Lasting Pavement Performance: Reduces maintenance needs and lifecycle costs.
• Precision Manufacturing: Ensures uniform performance across projects, climates, and construction cycles.

 

Description
Unit
Value
Test Method
Average 7-day Max. Pavement Design Temp
°C
< 70
ASTM D6373
Minimum Pavement Design Temperature
°C
>-28
ASTM D6373
ORIGINAL BINDER
Flash Point Temp, T48: Minimum
°C
230
ASTM D92
Viscosity Max. Test Temperature
Pa S
0.3
ASTM D4402
Dynamic Shear, TP5:Min 1.00 kPa test temp@10rad/s
KPa
1.00 Min
ASTM D6373
ROLLING THIN FILM OVEN (T240)
Mass Loss, Maximum, Percent
%
1.00
ASTM D6
Dynamic Shear, TP5:Min 2.20 kPa test temp@10rad/s
KPa
2.20
ASTM D6373
PRESSURE AGING VESSEL RESIDUE (PPI)
PAV Aging Temperature
100/110
Dynamic Shear, TP5:Max 5000 kPa test temp@10rad/s
KPa
5000
PHYSICAL HARDENING REPORT
Creep Stiffness, TP1:S, Max 300.0MPa, Min0.300 test temp@60s
°C
-18
ASTM D6648
Direct Tension, TP3: Failure Strain, Min 1.0% test temp@1.0mm/min
°C
-18
ASTM D6723