Polymer Modified Bitumen

PMB is a highly specialized blend of Bitumen with high-quality polymer (Elastomeric) and is manufactured under carefully controlled conditions in a “State of Art” plant. PMB is an exceptionally versatile product with enhanced properties that makes it suitable for wearing course application under special conditions like high rainfall and high traffic.

# Properties PMB 40 PMB 70 PMB 120
1 Penetration at 25˚C, 0.1mm max 30-40 50-60 90-150
2 Softening Point, ˚C min 60 55 50
 3 Elastic Recovery of half thread in Ductilometer 15 ˚C, % min 70 70 70
 4 Flash Point, ˚C, min 220 220 220
 5 Separtion, difference in Softening Point, ˚C, min 3 3 3
 6 Thin Film Oven test and test on residue

Increase in Softening Point, ˚C, max
Reduction in Penetration at 25˚C, max
Elastic Recovery of half thread in Ductilometer
at 25˚C of residue, % min

 5
35
50		 6
35
50		 7
35
50
7 Ductility at 27˚C, cm +50 +60 +75
8 Viscosity at 150˚C, Poise 3-9 2-6 1-3

Crumb Rubber Modified Bitumen

CRMB is a special type of value-added Bitumen where the properties have been improved by blending with crumb rubber and a special type of additives. CRMB with enhanced physical properties is more resistant to temperature variations, weathering and high traffic loads. This leads to improved pavement life, reduced maintenance costs and excellent driving comfort.

# Properties CRMB 50 CRMB 55 CRMB 60
1 Penetration at 25˚C, 0.1mm max 70 60 50
2 Softening Point, ˚C min 50 55 60
 3 Elastic Recovery of half thread in Ductilometer 15 ˚C, % min 50 50 50
 4 Flash Point, ˚C, min 220 220 220
 5 Separtion, difference in Softening Point, ˚C, min 4 4 4
 6 Thin Film Oven test and test on residue

Reduction in Penetration of residue at 25˚C, % max
Increase in Softening Point, ˚C, max
Elastic Recovery of half thread in Ductilometer
at 25˚C of residue, % min

 40
7
35		 40
6
35		 40
5
35