fhwa emulsion task force (etf) micro surfacing · fhwa emulsion task force (etf) micro surfacing...
TRANSCRIPT
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FHWA Emulsion Task Force (ETF) Micro surfacing
James S. Moulthrop, P.E. Executive Director
FP2 Inc. Rocky Mountain West Pavement Preservation
Partnership Meeting October 8, 2014
Phoenix, AZ
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Presentation Outline
Subcommittee membership
Products developed in AASHTO
format
Status
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Design Group –Mixtures Members
• Co Chairs
Jim Moulthrop
Gary Hicks
• Members
Chris Anspaugh
Deborah Deep
Tim Folwell
Larry Galehouse
Tom Wood
• Members (con’t)
Greg Harder
Mark Ishee
Ian Jack
Bob Jerman
Chris Lubbers
Rusty Price
Troy Tindall
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Products Developed
• Standard Specification for Materials for
Micro Surfacing
• Standard Practice for Micro Surfacing
Design
• Standard Specification for Micro
Surfacing Construction
• Micro surfacing Best Practices
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Process Used
• The Need- improve current practice and specification in AASHTO format for nationwide use
• Go by-Specification Developed by MNDOT for cold climate applications
• Development-draft prepared and circulated for review by the ETF mix group
• Comments were received, debated and incorporated
• Final draft standards and specification sent to the ETF members and to AASHTO
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Elements of the Materials Spec
• Scope
• Referenced Documents
• Terminology
• Significance and Use
• Emulsified Asphalt Requirements
• Aggregate Requirements
• Mineral Filler
• Water
• Additives
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Elements of Design Practice
Scope
Referenced Documents
Summary of Practice
Significance and Use
Evaluation of Materials
Determining Mixing
Time
Determining Set and
Cure Characteristics
Determining Binder
Content
Determining Asphalt to
Aggregate
Compatibility
Determining Vertical
and Lateral
Displacement
Report
Key Words
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Elements of Construction Spec
• Description
• Materials
• Mix Design
• Equipment
• Construction
• Quality Control
• Acceptance
• Method of Measurement
• Basis of Payment
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Elements of Construction Spec
• Equipment
Mixing
Proportioning Devices
Spreading Equipment
Secondary Strike-off
Rut Box
Brooms
Rolling
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Elements of Construction Spec
• Construction
Weather Limitations
Calibration
Preconstruction Meeting
Pavement Surface Preparation
Test Strip
Application of Mixture
Workmanship
Opening to Traffic
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Elements of Construction Spec
• Quality Control
Aggregate
Emulsified Asphalt
Project Documentation
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Elements of Construction Spec
• Acceptance
Aggregate
Emulsified Asphalt
Method of Measurement
Basis of Payment
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Best Practices for Micro surfacing
• Supports the
specifications and
practice
• Provides guidance
• Identifies gaps in
current knowledge
and research needs
• Stand alone
document for micro
surfacing
• Still under review
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What’s Next-Micro Surfacings
• Re-distribute the
updated version of
Best Practices to
the mix group for
comments
• Once the comments
are incorporated,
distribute it to the
ETF for their review
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What’s next for the Mix Group?
• Slurry Seals
Materials spec
Design practice
Construction Guide
Best practices
• Need to develop a
team to do this work
• Cold Patching
materials
Materials spec
Design practice
Construction Guide
Best practices
• Need to develop a team
to do this work
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