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Expert Task Group on Asphalt Mixtures & Construction; Asphalt Binders; and Models Technology August Attachment D Superpave Standards and Specifications
(ppt version 66 kb)
Slide 1
Superpave Standards and Specifications
- Haleem
- AASHTO
- SEPTEMBER 2001
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Slide 2
How well is Superpave doing?
- The level of acceptance of Standards
and specifications by the AASHTO
Member Departments is one major indicator.
- The national survey is, of course,
another indicator.
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Slide 3
SHRP produced 30 standards applicable to HMA
- 18 relate directly to Superpave.
- Remaining Standards advance the HMA
technology.
- State Materials Engineers adopted these
Standards provisionally over a period
of 5 years, 1993-98.
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Slide 4
AASHTO Provisional Standards
The Rules
- The provisional have a maximum life
of 8 years. When that expires, they must
be moved to become Full Standards or
discarded.
- The first batch of these standards was
adopted in 1993.
- The first batch is due to be balloted this
year for the change of Status to full standards.
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Slide 5
The Status of Superpave Standards
- 4 standards have already become
full standards.
- 8 are due to become full standards
in December.
- The remaining 6 will be moved to the
full standard status within the next 3 years.
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Slide 6
Why do the Superpave standards
have such wide acceptance
ETG s played a vital role.
- Continued Technical input in
refining the standards.
- Accelerated the acceptance
process.
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Slide 7
Recommendations
- ETGs are well respected by the member
departments. Members feel that the ETG
Structure should be preserved and used
as a way to do business in the future.
- AASHTO Subcommittee on Materials feels
that a full time AASHTO Staff person is
needed to support all future materials Standards.
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