porous pavement – sr 234 park and ride lot
TRANSCRIPT
Porous Pavement – SR 234 Park and Ride Lot
Fall Asphalt Conference Richmond, VA
David Shiells, P.E. Virginia Department of Transportation
David Branscome Branscome Paving Company
Michael Fitch, Ph.D. Virginia Center for Transportation Innovation and Research (VCTIR)
October 8, 2013
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Pilot Project
Route 234 Park and Ride Lot
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Parking Lot Layout
Parking Lot #1
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Permeable Pavement Porous Asphalt • Highly permeable asphalt layers • Large reservoir of #2/#3 aggregate • Water infiltrates into soil • Water slowly discharges to storm drainage system
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Typical Section
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Parking Lot Layout
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Pilot Project Objectives
Design Considerations • Soil types/infiltration rates • Depth of aggregate reservoir • Thickness of porous asphalt layers Cost • Right-of-Way • SWM facilities • Construction costs • Life cycle
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Pilot Project Objectives
Material Properties • Permeability of mixes • Compaction in the field • Field tests for permeability Constructability • Base aggregate type • Installation of electrical conduit • Concrete curb and planter islands • Sequence of construction • Type/thickness of pavement markings
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Pilot Project Objectives
Maintenance • Snow and ice treatment • Removal of sand/salt/leaves, etc. • Special vacuum trucks for cleaning/grit removal • Disposal of debris in a sanitary landfill • Future mill/overlay ?
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Permeable Pavement Construction
Subgrade
Base Aggregate Course
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Permeable Pavement Construction
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Base Aggregate Course
Permeable Pavement Construction
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Permeable Pavement Construction
Monitoring Well
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PAM-19.0 Placement
Permeable Pavement Construction
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PAM-19.0 Placement
Permeable Pavement Construction
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PAM-19.0 Placement
Permeable Pavement Construction
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PAM-19.0 Placement
Permeable Pavement Construction
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PAM-9.5 Placement
Permeable Pavement Construction
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PAM-9.5 Placement
Permeable Pavement Construction
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PAM-9.5 Placement
Permeable Pavement Construction
Research Study
Get VDOT-specific information on:
Long-term hydraulic performance
Maintenance requirements (associated costs)
Acceptable rehabilitation methods
Costs (as compared to more traditional stormwater BMPs)
Methods
Different maintenance treatments: 1. Vacuum Type 1 (6 months) 2. Vacuum Type 2 (6 months) 3. Vacuum Type 1 (12 months) 4. Control * Additional methods if
necessary
Measure permeability over time
Permeability Measurements Laboratory
Permeability Measurements Field
Permeability Measurements Field (Supplemental)
Permeability Values: Field
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
1 2 3 4 5 6
Perm
eabi
lity
(cm
/sec
)
Location Number
Average: 0.28 cm/sec.
Permeability Values: Laboratory
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
1 2 3 4 5 6
Perm
eabi
lity
(cm
/sec
)
Core Number
Average: 0.29 cm/sec.
Changes in Permeability
-
5,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
45,000
50,000
T2A T0A T2B T3A T1A T1B
Perm
eabi
lity
(10-
5 cm
/sec
)
Location Number
May-13 Jul-13
Finished Pavement
29
Questions ?