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POLYMER AND CRUM RUBBRE MODIFIED BITUMEN : |
UNIVERSAL Modified Bitumen is a high quality, hot applied Polymer or Crum Rubbre modified Bitumen for use in Road construction. The high quality polymers or Rubbre used in Universal Modified Bitumen, it is expected to give 50 to100 percent higher life of road surfacings depending upon the degree of modification and type of additives used. Universal Modified bitumens are generally recommended for the roads with heavy trafic. The Polymers/Rubbres used in Universal modified bitumen are having properties like compatible with bitumen, Resist degradation of bitumen at mixing temperature, Produce coating viscocity at application temperature, Maintain premium properties during storage application and in service.
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Applications : UNIVERSAL Modified Bitumen can be used for |
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Stress absorbing membrane (SAM) for sealing of cracks as well as interim overlay for reventive maintainance for delaying reflaxion cracking. |
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In high rainfall areas due to their better creep resistance properties, also at busy junctions, bridge decks, roundabouts for increased life of surfacing in snow bound areas etc. |
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Types : Universal Modified Bitumen is available with modifiers like Plastomeric hermoplastic, Elastomeric Thermoplastic, Synthetic Rubbre Latex, Natural Rubbre and Crum Rubbre. |
Selection : UNIVERSAL Modified Bitumen type selection is based on Climatic, Traffic, Performance reports and life cycle cost analyses. Atmospheric Temperature Selection criteria for PMB and CRMB is as
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< 35 C – PMB120 or CRMB 50
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35 to 45 C- PMB 70 or CRMB 55 |
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> 45 C- PMB 40 or CRMB 60 or CRMB 55 |
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Handling : At Universal Modifier and Bitumen is thoroughly blended so that the Modified Bitumen retains its premium properties. The storage stability of Modified Bitumen at high temperature is very important. Universal Modified Bitumen is blended as per IRC specification at our factory.
Testing facility for penetration, softening point, separation and recovery can be done in house at lab in the factory.
Third party govt approved laboratory certificate can also be provided on request.s
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‘UNIVERSAL’ MODIFIED BITUMEN GENERAL SPECIFICATIONS : |
Specifications for Polymer Modified Bitumen (PMB) ( Plasomeric Thermoplasic Based) |
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SPECIFICATIONS - LIMITS OF GRADE |
PMB 120 |
PMB 70 |
PMB 40 |
| Penetration at 25 C, 0.1mm, 100g, 5sec. |
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50 to 90 |
30 to 50 |
| Siftening Point,(R&B), C, Minimum |
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55 |
60 |
| Ductility at 27 C, cm |
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40 |
30 |
| Fraass Breaking Point C , *Maximum |
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-16 |
-12 |
| Flash Point, By COC C, Minimum |
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220 |
220 |
| Elastic Recovery of Half Thread in Ductilometer at 15 C, Minimum |
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3 |
3 |
Viscocity at 150 C, Poise
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Thin Film Oven Test (TFOT) on Residue (IS:9382 -1992) |
| Loss in weight, % Maximum |
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1.0 |
1.0 |
| Increase in Softening Point C, Maximum |
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6 |
5 |
| Reduction in Penetration of Residue, at 25 C, % Maximum |
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35 |
35 |
| Elastic Recovery of Half Thread in Ductilometer at 25 C, % Minimum |
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35 |
35 |
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