Transcript Longitudinal Joint Performance Improvement Sub

APAI/INDOT
Longitudinal Joint
Technical Sub-Committee
APAI Winter Conference
December 14, 2010
M. Dudley Bonte
History
– Need expressed at APAI Technical
Meeting
– 7-28-2009 – Draft Density Specification
proposal to INDOT for Consideration
– Need acknowledged by INDOT, but
tabled due to more pressing issues
(stimulus, RAP, etc.)
– 3/08/2010 – Discussion restarted, Task
Committee formed
Task Committee
– Mike Prather, INDOT
– Matt Beeson, INDOT
– Jeff James, INDOT
– Heather Woods, INDOT
– Tom Duncan, FHWA
– Brian Crume, APAI
– Dudley Bonte, APAI
Direction of Committee
– Reviewed NCAT & JTRP reports sent out
– Discussed many options for improving
Joints
• Joint Mastic (best long term performer in
studies)
• Notch Wedge Joints
• Compaction methodology (Roller Techniques)
• Density along Joint
• Fog seals
• Others
Possible Options
• Joint Mastic Material
–Good LT performance in studies
–Plausible short term step
–Difficult to measure density
–Supply/ without proprietary
product
–Experimental project in LaPorte
District
Possible Options
• Density Specification
–How to incorporate PWL
–More destructive testing
(cores on joint)
–How to accept and pay?
Gmm? Administration?
Possible Options
•Fog seal
–Reduce permeability
–Difficult to measure
–Needs further study
Possible Options
• COMBINATION OF SOLUTIONS
Special Provision
(Approved by Standard Committee)
• Joint Adhesive Materials
–Applied to intermediate and surface
joints
–Pay Unit- LFt.
• Informational Cores (data
gathering)
–Acceptance cores- > 12” from Joint
–Information Cores- 6” from Joint
Study Plan
• Target 6 jobs
– Tonnages >15000 ton for Intermediate & >
9000 ton for Surface
• Gather & Review data collected
• Continue studies of other methods &
technologies (e.g. fog seals)
• Note: having some difficulty targeting
study plan jobs
Discussion / Q & A