RUBBERIZED ASPHALT

RUBBERIZED ASPHALT

1. Rubber production

   • 1-Malaysia is world 3rd natural rubber producing country
     • Natural Rubber is harvesting from trees in the form of latix
       • Rubber technalogy is continously getting famous in the world.

2. Rubber + Asphalt is a great contribution in the asphalt paving industry becouse of it's specially properties, it will also help in the economy of a country.

3. Rubber Eco-friendly,

   • less impact on environment
     • Recyclable Material
       • Renewable Resources
         • Sustainable Crop.

4. Production

   • Dry Process, Crumb rubber mixes with aggregate before incorporating asphalt binder. 1-3 % of coarse rubber (1.6 -6.4 mm) by agg wt.
     • Dry process in Production
       • No need of special place for storage
       • No Settling
       • Simple Machinery
       • Normal Plant operation Temperature
   • Wet Process, 10-25 % rubber asphalt binder is reacted with asphalt binder at 190 - 280 c for 1-2 h
     • Storage Stability Issue
     • Lab Test
       • Reduce Penetration
         • Increase Softening Point
           • Increase rutting resistance
             • better viscosity-temperature susceptibility

5. Different types of Rubber

   • Natural (Cup Lump)
     • 1-LNR, 2-Field Latex, 3-RSS, and 4-NRP
   • Recycled ( Tires crumb rubber)*Recycled Rubber
     • a huge amount of tyres discarded every year- This is critical issue proposed to reuse in modified bitumen.
     • Different Sizes
       • Powder (0.3 - 0.6)
         • Rubber Shred (o.85 - 2.36)
           • Granules (1-4mm)
             • It react with asphalt with higer temp C to produce modifier
     • Advantages
       • Highly flexible and stability
         • Great adhesion b/w binder & aggregate
           • Overall imprved performance in extreme climatic conditions.
   • Artifisal Rubber

6. Undercompression test shows that adding rubber reducing crack growth in asphalt

7. SAM & SAMI

8. Issues with the use of rubber

   • Pretreatment
   • Rubber swelling
   • Production
   • Long term monitoring

9. Rubberized Pavement Benefit

   • Rutting Resistance
   • Cracking Resistance

10. Make Road

    • More Durable
    • Quieter
    • Safer
    • More Sustainable

11. Economy

    • Dry pocess cost 3.70$/Ton Mix, 63$ binder ton
    • Low Capital Cost
    • Significant cost saving for producer and road owner

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