Crumb Rubber Modified Bitumen

CRUMB RUBBER MODIFIED BITUMEN
CRMB is a high performance Crumb Rubber Modified Bitumen manufactured using finely powdered scrap tyre rubber and processed in
a sophisticated reactor at high temperatures. Complex processing modifies the properties of Bitumen and imparts additional strength,
elasticity and other beneficial properties to make it better able to withstand high traffic loads, extreme weather conditions and other
forms of stress. Use of CRMB leads to excellent pavement life, driving comfort and low maintenance.
The use of Crumb rubber to modify asphalt has an interesting history. Highway Engineers around the world tried their best to capture
the flexible nature of rubber in a longer paving surface. Asuccessful formula was discovered in the 1960s to repair pot holes on some
streets in the United States. The patches worked well and the asphalt – rubber began to be used as a binder for chip – seals. From then
on, the use of this material spread rapidly through out the world.
CRMB is manufactured in three grades for differing weathering conditions. Grade 50 is used for colder climates where minimum
modification is sufficient. Grade 55 is used in moderate climatic conditions where moderate modification is required. Grade 60 is used
in hot conditions where high modification is required to withstand the extra heat.