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Pavement Layer Tacking and Bonding
February 26, 2015
David T. Lee, P.E. District Materials Engineer
Bond
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Pavement Layer Tacking and Bonding February 26, 2015 David T. Lee, - - PowerPoint PPT Presentation
Pavement Layer Tacking and Bonding February 26, 2015 David T. Lee, - - PowerPoint PPT Presentation
Pavement Layer Tacking and Bonding February 26, 2015 David T. Lee, P.E. District Materials Engineer Bond 2 Issues with Bond 3 Core Separation (New Construction) 4 NCAT Test Track 5 Conclusions from NCAT 6 Tack 7 Tack Road and Bridge
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SLIDE 3
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Issues with Bond
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Core Separation (New Construction)
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NCAT Test Track
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Conclusions from NCAT
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Tack
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SLIDE 8
Tack
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Road and Bridge Specifications, Sec. 310.03
Undiluted asphalt shall be applied at the rate of 0.05 to 0.10 gallons per square yard. Diluted asphalt shall be applied at the rate of 0.10 to 0.15 gallons per square yard.
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Tack Application Rate
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Tack Application Rate
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Tack Application Rate
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Tack Application Rate
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Tack Application Rate
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Tack Application Rate
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Tack Application Rate
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Tracking of Tack
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SLIDE 17
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Issues to be Addressed
- Specification of correct tack material
- Storage and handling of tack
- Measurement and verification of application rates
- Verification of bond strength ?
- Tracking of tack
Tack and Bond Strength
SLIDE 18
Virginia Tack and Bond Task Force
The first meeting of the Virginia Tack & Bond Strength Task Force was held
- n Friday, February 6, 2015.
Task Force Lead: Rob Crandol Initial Topics:
- Defining the scope, schedule and expectations of the task force
- Information about best practices & specs currently used around the
country
- Establishing and agreeing on clear ‘problem statements’
- Planning future work
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