SEAUPG ANNUAL MEETING NOVEMBER 13, 2013

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1 Trenton M. Clark, P.E. Virginia Asphalt Association David White Superior Paving Corporation Current system is approximately 5,230 ln mi Pavement types Flexible Jointed Concrete Continuously Reinforced Concrete Composite Asphalt over JCP and CRCP Over time, Flexible and Composite mileage percentage has increased and PCC mileage has decreased Majority of system built in 1960 s and 1970 s Flexible pavement primarily in Central/Western portion of Virginia, Jointed Reinforced Concrete in Eastern Virginia Sections of CRCP constructed near Charlottesville, Richmond and Hampton Roads Repairs in the early years were: Flexible pavements: AC overlay Surface treatments Localize deep patching (stripping aggregates) Repairs in the early years were: Rigid pavements: Joint and punch out patching Joint sealing Grinding 1

2 Repairs starting in late 1980 s: Flexible pavements (same approach) Rigid pavements: Joint and punch out patching Joint sealing Grinding Full removal and replacement Initial asphalt concrete overlays Experimental bonded concrete overlays Primary technique was patching deteriorated joints and grinding I 95, I 495 and other sections overlaid with conventional AC of varying thickness Ride quality improved until reflective cracking and raveling of cracks occurred Major improvement in technique with overlay of I 81 ( ) Patching of joints AC and PCC Slab Replacement and Undersealing SMA Overlay Primary technique was patching deteriorated punch outs 25.0 I 64 overlaid with conventional AC of varying thickness 20.0 Ride quality improved until further CRCP 15.0 deterioration occurred Major improvement in technique with overlay 10.0 of I 295 (1997) 5.0 Patching of punch outs AC and PCC Conventional AC and SMA Overlay (3.5 ) 0.0 Age (years) SM BIT SM BOC SM BOJ SMA BIT SMA BOC SMA BOJ Linear Euler 2

3 I-66 Pavement Rehabilitation 3

4 Goal Provide a cost effective pavement rehabilitation that will last for 20 years with minimum disruption to the traveling public Challenges for Pavement Rehabilitation Limited space for Maintenance of Traffic (MOT) Limited times for dual lane closures Limited overhead clearance for existing bridges Drainage Concrete barriers Lane shifts across longitudinal joints in concrete Coordination with adjacent Mega Projects 19 Original Construction, 1960 to concrete pavement, wire mesh reinforcement, 61.5 transverse joint spacing 6 plain aggregate 6 soil cement 20 year design life; design ADT was 22,350 vpd 24 4

5 Limited Space for Maintenance of Traffic Outside shoulder is currently used as a travel lane in peak hours (5:30 am to 11:00 am EB and 2:00 pm to 8:00 pm WB) Inside shoulders varied from 2 8 wide No shoulders at some bridge locations Limited Times for Dual Lane Closures Weekdays 10:00 pm to 5:00 am (EB)/6:00 am (WB) Saturday and Sunday 7:00 pm to 9:00 am Shoulder Lane Minimal Shoulder Shoulder Lane HOV Lane Concrete Barriers and Drainage Structures Median and WMATA (5 miles locked in ) Lane shifts across Longitudinal Joints in Concrete WMATA Barrier Retaining wall Drainage Structure Median Barrier Shoulder Lane 27 Longitudinal joint crossing wheel paths 28 Scope of Work Co ordination with adjacent Mega Projects I 495 HOT Lanes Dulles Rail Existing Median or Metro Barrier, depending on location (HOV) Travel Lane 2 Travel Travel Lane 1 Travel Lane 3 Aux. Lane 6 ± Patch badly deteriorated concrete pavement with full-depth concrete patches and seal joints Patch minor spalling with asphalt Seal joints, eradicate pavement markings, remove snow plowable raised pavement markers Place 5/8 Thin Hot Mix Asphalt Concrete Overlay stress absorbing membrane interface layer 2 SMA-12.5 (PG 76-22, polymer modified) 1-1/2 SMA-9.5 (PG 76-22, polymer modified) 3/8 High Friction Surface Course to delineate auxiliary travel lane

6 Extremely rough pavement with failed patches and joints Full depth concrete patches Patch minor spalls with asphalt or partial depth patches Pavement surface very rough after concrete patches Spray bar paver Heavy tack 2 SMA (48,388 Tons) Scratch course for leveling (6,500 Tons) 1.5 SMA (33,208 Tons) Delineate part time shoulder pavement with a different color as a safety improvement Average IRI (ins/mi.) Lane EB WB N/A 48 Note: project design-build specification required average IRI < 70 ins./mi. with no individual 0.01 mile section >80 ins./mi. 35 6

7 Delivered Fall 2012 a safer, and smoother, I-66! 38 7