Innovation in Bitumen
CRMB
Explore Bernet CRMB, high-performance recycled-rubber binders (CRMB 50 to CRMB 60) compliant with IS 15462 and ASTM D6114. Superior elasticity, sustainability, and rutting resistance.
High-Performance Crumb Rubber Modified Bitumen (CRMB)
Crumb Rubber Modified Bitumen (CRMB)
Crumb Rubber Modified Bitumen (CRMB) is a worldwide newly developed economic solution enhancing the quality of bitumen used in asphalt mixers for road developments. In this product bitumen is modified using recycled tires and additives. Modification can increase road lifetime built using such bitumen up to 5 times.
Bernet Bitumen offers 3 grades of CRMB for different road networks:
- Warm Climate CRMB 60
- General Climate CRMB 55
- Cold Climate CRMB 50
CRMB is based on a unique technology that enables homogeneity, stability and consistency in properties of binder throughout the supply chain. To achieve this, special stabilizing additives are used and a special manufacturing process is adopted. The result is a high performance bituminous binder with unique properties that are consistent.
Crumb Rubber Modified Bitumen is designed to maximize resistance to permanent deformation and to reduce fatigue of asphalt mixtures that are used in most locations.
Engineered for Sustainable High Performance
The careful selection of additives greatly enhances binder performance, improves elasticity, reduces temperature susceptibility and improves adhesion. Our product range is particularly suited to heavy traffic locations such as highways, main roads, airfields, roundabouts and bus lanes.
Superior Elastic Modulus of Bernet CRMB helps control deformation under high pavement temperature and heavy loading conditions, Increases the fatigue life of pavement under repeated heavy loading conditions, Helps in reduction of maintenance cost and is more cost effective on a life cycle cost basis, Is used for use in thin surfacing and stone mastic asphalt (SMA) mixes; drainage (porous) asphalt applications and asphalt mixtures designed for high resistance to permanent deformation and high flexibility.
According to RPA (Rubber Pavement Association) Arizona, USA best bitumen choice for more than 80% of road construction projects are CRMB. RPA’s in depth research and analysis reports the cost of CRMB and conventional bitumen to be estimated at $10 PSY vs. $45 PSY respectively over four years. Using CRMB commits to a sustainable future, creates safer and less consumable smooth roads.
Engineered for Strength & Flexibility
Comprehensive Range of Crumb Rubber Modified Bitumen (CRMB)
Bernet Bitumen supplies three CRMB grades tested in accordance with AASHTO T49, T53, T48, T47, ASTM D6114, and IS 15462.
Bitumen CRMB 50
Overview: A medium-viscosity, flexible grade suitable for temperate climates and urban pavements requiring strong adhesion and moderate stiffness.
Indicative properties:
- Penetration @ 25 °C: 40–60 (0.1 mm)
- Softening point: ≥ 60 °C
- Elastic recovery @ 25 °C: ≥ 70 %
- Flash point: ≥ 220 °C
- Change of mass after TFOT: ≤ 1 %
These parameters ensure high flexibility, good coating characteristics, and balanced performance under medium traffic.
Applications: Urban streets, overlay works, and regional highways in moderate climates.
Standards: Complies with IS 15462 (CRMB 50) and ASTM D6114.
Bitumen CRMB 55
Overview: A balanced, high-performance binder designed for heavy-traffic pavements in warm to hot regions.
Indicative properties:
- Penetration @ 25 °C: 30–50 (0.1 mm)
- Softening point: ≥ 65 °C
- Elastic recovery @ 25 °C: ≥ 75 %
- Flash point: ≥ 220 °C
- Change of mass after TFOT: ≤ 1 %
Combines stiffness for rutting control with elasticity for crack resistance.
Applications: National highways, dense bituminous macadam (DBM), and bituminous concrete (BC) wearing courses.
Standards: Conforms to IS 15462 (CRMB 55) and ASTM D6114.
Bitumen CRMB 60
Overview: A stiff, polymer-rubber modified binder for very hot climates and maximum load-bearing pavements. Provides high stiffness, superior fatigue life, and long-term deformation resistance.
Indicative properties:
- Penetration @ 25 °C: 20–40 (0.1 mm)
- Softening point: ≥ 70 °C
- Elastic recovery @ 25 °C: ≥ 80 %
- Flash point: ≥ 230 °C
- Change of mass after TFOT: ≤ 1 %
Ensures structural stability and long-term performance even under severe thermal and traffic stress.
Applications: Airports, container terminals, and expressways in tropical or desert regions.
Standards: Complies with IS 15462 (CRMB 60), AASHTO T49, and ASTM D6114.
Applications & Advantages
- Enhanced elasticity and durability through rubber modification
- Excellent rutting, fatigue, and thermal-crack resistance
- Contributes to sustainable infrastructure by recycling tires
- Suitable for hot-mix and warm-mix asphalt
- Proven performance under heavy-traffic and extreme-temperature conditions
Why Choose Bernet Bitumen
- Produced under ISO-certified manufacturing and QC systems
- Compliant with IS, ASTM, and AASHTO standards
- Environmentally responsible and field-proven formulation
- Comprehensive technical support and documentation for each project
Advantages of using CRMB over Conventional Bitumen
| Conventional Bitumen | Crumb Rubber Modified Bitumen (CRMB) |
|---|---|
| 6 to 8 cm Topcoat Asphalt Thickness | 5 to 7 cm Topcoat Asphalt Thickness |
| 1 to 5 Years Road Lifetime | 5 to 15 Years Road Lifetime |
| High Maintenance Cost | Extremely Low Maintenance Cost |
| Low Stability Under High Loads | Very High Stability Under High Loads |
| Extremely Low Flexibility | Extremely High Flexibility |
| Moderate Skid Resistance | High Skid Resistance |
| Low Fatigue Resistance | High Fatigue Resistance |
| Low Elastic Recovery Causes Asphalt Deformation | High Elastic Recovery Resists Asphalt Deformation |
| Moderate Resistance to High and Low Temperature | High Resistant to Extreme High and Low Temperature |
| Low UV Protection Causes Early Aging | High UV Protection Increases Lifetime |
| Moderate Car Cabin Noise Penetration | Low Car Cabin Noise Penetration (Up to 4dB) |
| NON ECONOMICAL | HIGHLY ECONOMICAL |
Bernet Bitumen CRMB Grades Technical Data (Consolidated)
| Grade | Penetration @25°C (0.1mm) | Softening Point (°C) | Elastic Recovery @15°C (%) | Flash Point (°C) | Separation Δ Softening Point (°C) | Viscosity @150°C (Poises) | Loss in Mass (%) | Reduction in Penetration (%) | Increase in Softening Point (°C) | Elastic Recovery @25°C (%) | Test Standard | Packaging |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CRMB 50 | ≤70 | 50 | ≥50 | 220 | ≤4 | 1 – 3 | ≤1.0 | ≤40 | ≤7 | ≥35 | ASTM D5, D36, D6084, D92, D7173, D2170/D4402, D6, D6085 | 185KG Steel Drum / 1MT Palletized Wooden Box |
| CRMB 55 | ≤60 | 55 | ≥50 | 220 | ≤4 | 2 – 6 | ≤1.0 | ≤40 | ≤6 | ≥35 | ASTM D5, D36, D6084, D92, D7173, D2170/D4402, D6, D6085 | 185KG Steel Drum / 1MT Palletized Wooden Box |
| CRMB 60 | ≤50 | 60 | ≥50 | 220 | ≤4 | 3 – 9 | ≤1.0 | ≤40 | ≤5 | ≥35 | ASTM D5, D36, D6084, D92, D7173, D2170/D4402, D6, D6085 | 185KG Steel Drum / 1MT Palletized Wooden Box |