Pavement Preservation Design April 20, Roadway Conference
Pavement Services Unit Pavement Services Manager Pavement Design Pavement Management Pavement Quality Pavement Materials
Preservation Program Add useful life to the road without increasing capacity. May include reconstruction to re- establish an existing roadway. Includes inlays, overlays, or other rehabilitation type alternatives.
Before…
After!
Pavement Design Inputs Maintenance History Construction History Traffic Distress Survey Subgrade Strength Pavement/Base: Conditions/Depths Field Work Construction Limitations
Field Crew in Operation
Subgrade Strength: Falling Weight Deflectometer
NDT Load “Strong” Pavement “Weak” Pavement Strong vs. Weak Pavements
Base: Conditions/Depths
Pavement: Conditions/Depths
MP 1.22 PD #15 MP PD #16 MP PD #17 MP PD #18 MP PD #19 MP 1.46 PD #20 MP PD #21 Good ACFair ACPoor ACOil Mat Stripping Bridge #3584Bridge #3585Bridge #3586
Construction Limitations
Pavement Preservation Design Tools ODOT Overlay AASHTO 1993 AASHTO MEPDG
Engineering Analysis and Judgment
When to Contact Pavement Services Early in the Design Process Anytime the scope changes (even if it doesn’t seem like it will impact the pavement – we don’t mind phone calls or s) Schedule changes
Questions?