Task group on bitumen specifications

1
Task group on bitumen specifications

• Report back
• May 2005

2
Working groups

• Interim review of current specification
• Quality management during road haul
• Sampling
• Introduction of performance based specifications

3
Review of current specificationConvenor Denzil
Sadler

• Fine tuning following more than a decade of
  experience
• Promote equitable procurement
• Proposed amendments
• Mass change after RTFOT (max) 0.3
• Increase in RB SP after RTFOT (ºC max) 7
• Viscosity at 60ºC for 60/70 pg bitumen (min Pa S)
  140
• Need to assess long term ageing

4
Review/cont...

• Caveat on modificationCompliance of bitumen
  with this specification does not guarantee
  compatibility with various modifiers.
  Consequently the onus rests with the manufacturer
  of modified binders to ensure compatibility
  through testing.

5
Quality management during road hauling

• Extended terms of reference
• Draft document Code of practice for hauling
  bitumen and liquid bituminous products
  commissioned by Sabita
• Extending the quality chain and audit trail to
  point of off-loading
• Role of transporters still to be clarified

6
Proposals to RPF

• Acceptance of amendments to current
  specifications
• Acceptance in principle of caveat on modifier
  compatibility

7
Performance based specifications

• Kim Jenkins