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CRMB is a special type of bitumen whose properties have been improved by the addition of crumb rubber & special types of additives like hydrocarbon materials, resins etc. thus altering the physical properties of bitumen making it more resistant to temperature variations, weather & high traffic loads, reduced maintenance costs and excellent driving comfort.
Types of CRMB & Recommendation for specific use:
CRMB 60 : recommended for hot climate areas.
CRMB 55 : recommended for moderate climate areas.
CRMB 50 : recommended for cold climate areas.
Mixing/Coating 175-188 "C
Laying 150477 ?C
Beginning off Compaction over I40 ?C
End of Compaction 110420 "C
Advantages of CRMB:
- Lower susceptibility to daily & seasonal temperature variations.
- Higher resistance to deformation at elevated pavement temperatures.
- Better edge resistance properties.
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