CRMB 60: Recommended for hot climate areas
CRMB 55: For moderate climate areas.
CRMB 50: For cold climate areas.
CRUMB RUBBER MODIFIED BITUMEN
Bengal’s CRMB is specially formulated bitumen whose properties have been modified and improved by adding crumb rubbers and some special additives. The use of crumb is now a fairly established practice and is covered by IRC SP 53-2002.
Advantages of CRMB
Lower susceptibility to daily and seasonal temperature variations
Higher resistance to deformational to wear and tear at elevated temperatures.
Better adhesion between aggregate and binder
Increase in fatigue life.
Delay in cracking & reflective cracking.
Better water resistance.
As a wearing course for heavy trafficked roads, busy intersections, bridge decks and roundabouts.