- Product Overview
- Product Description
- Technical Specification
- Product Application
Crumb Rubber Modified Bitumen
Crumb Rubber Modified Bitumen (CRMB) is hydrocarbon binder obtained through physical and chemical interaction of crumb rubber (produced by recycling of used tyres) with bitumen and some specific additives.
Crumb Rubber Modified Bitumen is designed to maximise resistance to permanent deformation and reduce fatigue of asphalt mixtures that are used in the most demanding locations. The careful selection of additives greatly enhances binder performance, improving elasticity, reducing temperature susceptibility and improving adhesion. Our product range is designed for heavy traffic locations such as highways, main roads, airport runways and bus lanes.
BitChem Crumb Rubber Modified Bitumen is manufactured strictly as per IS 17079 : 2019.
| S.No. | Properties | CRMB 50 | CRMB 55 | CRMB 60 | ASTM Standards |
| 1 | Penetration at 25°C, 1/10 mm, 100g, 5sec | <70 | <60 | <50 | D5 |
| 2 | Softening Point (R&B), °C, Min | 50 | 55 | 60 | D36 |
| 3 | Elastic Recovery at 15°C, %, Min | 50 | 50 | 50 | D6084 |
| 4 | Flash point, COC, °C, Min | 250 | 250 | 250 | D92 |
| 5 | Separation, Difference in Softening Point, °C, Max | 4 | 4 | 4 | - |
| 6 | Viscosity at 150°C, Poises | 1-3 | 2-6 | 3-9 | D2170/D4402 |
| 7a | Loss in Mass, %, Max | 1.0 | 1.0 | 1.0 | D6 |
| 7b | Reduction in Penetration of Residue at 25°C, 100g, 5s, %, Max | 40 | 40 | 40 | D5 |
| 7c | Increase in Softening Point, °C, Max | 7 | 6 | 5 | D36 |
| 7d | Elastic Recovery at 25°C, %, Min | 35 | 35 | 35 | D6085 |
CRMB helps control deformation under high pavement temperature and heavy loading conditions, increase 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. It is used 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.
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