porous asphalt pavements ppt.pdf
TRANSCRIPT
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
1/52
OHIO RIDES ON US
OHIO RIDES ON US
Porous Asphalt Pavement
Design, Construction andMaintenance
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
2/52
AMERICA RIDES ON US
AMERICA RIDES ON US
What are Porous Pavements?
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
3/52
OHIO RIDES ON US
OHIO RIDES ON US
Porous Asphalt
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
4/52
AMERICA RIDES ON US
AMERICA RIDES ON US
Why Porous Pavement?
• New stormwater regulations – Reduce total volume (not just peak flow) – Limiting impervious area – Improve runoff quality – Taxing runoff
• Sustainability• Build lot flat,• no puddles 0
1
2
3
4
0 400 800 1200 1600 2000 2400Time
F l o w
( c f s )
Post-Dev. InflowInfiltration Bed DischargePre-Development Runoff Detention Basin Discharge
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
5/52
AMERICA RIDES ON US
AMERICA RIDES ON US
Porous Asphalt Pavement Development
•Concepts developed by the Franklin Instituteunder US EPA grant – 1972•Tested in pilot projects during 1970’s •Franklin Institute Press – Porous Pavement byThelen and Howe - 1978•Development of geotextiles in 1979•Current design since 1980
•Cahill Associates (now CH2MHill) has builtover 150 projects since 1980•Outstanding engineering project - 2000
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
6/52
OHIO RIDES ON US
OHIO RIDES ON US
Porous Asphalt Use – Light DutyParking Facility
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
7/52
OHIO RIDES ON USOHIO RIDES ON US
Porous Asphalt Use – Light DutyParking Facility
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
8/52
OHIO RIDES ON USOHIO RIDES ON US
Porous Asphalt Use – Light DutyRoadway
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
9/52
OHIO RIDES ON USOHIO RIDES ON US
POROUSPAVEMENT FORSTORMWATER
CONTROL
• Design• Construction• Maintenance
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
10/52
OHIO RIDES ON USOHIO RIDES ON US
POROUS PAVEMENTDesign, Construction, Maintenance
• Components of a porous pavementsystem
• Performance• Design considerations• Constructing a porous pavement system
• Ensuring long life through propermaintenance
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
11/52
OHIO RIDES ON USOHIO RIDES ON US
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
12/52
OHIO RIDES ON USOHIO RIDES ON US
Highly permeableasphalt surface
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
13/52
OHIO RIDES ON USOHIO RIDES ON US
Highly permeableasphalt surface
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
14/52
OHIO RIDES ON USOHIO RIDES ON US
Highly permeableasphalt surface
Air Voids: 17%
Permeability: 352 to 6000ft/day (soil: 6 in/hr)
AASHTO no. 8 sizeaggregate (1/2 inch max)
100% crushed stone forstrength & stability
Polymer modified asphaltbinder (6% min)
Layer thickness: 4 to 6inches
Modeled after ODOT SS803(open graded frictioncourse)
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
15/52
OHIO RIDES ON USOHIO RIDES ON US
Stone rechargebed / reservoir
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
16/52
OHIO RIDES ON USOHIO RIDES ON US
Stone rechargebed / reservoir
Purpose: Stormwaterstorage and discharge
Depth/thickness of reservoir
will depend on design stormevent and soil permeability.
Air Voids: 40%
AASHTO no. 2 sizeaggregate (1 ½ - 2 ½ inch)
100% crushed stone ensuresstability
Ensure void structureprovides long-termpermeability
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
17/52
OHIO RIDES ON USOHIO RIDES ON US
Source: Ohio Aggregates and IndustrialMinerals Association
Aggregate Size Voids (Average %)No, 2 Limestone 41No. 4 Limestone 41No. 57 Limestone 41No. 8 Limestone 42No. 7 Limestone 42Limestone sand 36
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
18/52
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
19/52
OHIO RIDES ON USOHIO RIDES ON US
Stabilizing layer
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
20/52
OHIO RIDES ON USOHIO RIDES ON US
Stabilizing layer
Purpose: Lock up surface ofstone recharge bed /reservoir in preparation forpaving
Thickness: approx. 2 inches
AASHTO no. 57 sizeaggregate (3/4 inch)
100% crushed stone ensuresstability
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
21/52
OHIO RIDES ON USOHIO RIDES ON US
Geotextile fabric
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
22/52
OHIO RIDES ON USOHIO RIDES ON US
Geotextile fabric
Purpose: Prevent migrationof fines from subgrade orexcavation into the pavementstructure.
Material: ODOT 712.09, TypeB
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
23/52
OHIO RIDES ON USOHIO RIDES ON US
Uncompactedsubgrade
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
24/52
OHIO RIDES ON USOHIO RIDES ON US
Uncompactedsubgrade
Purpose: retain soilpermeability
Avoid any activities that
would result in compactedsubgrade
Use excavation equipmentthat leaves a light footprint.
If necessary, reestablish
permeability by scarifying.
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
25/52
OHIO RIDES ON USOHIO RIDES ON US
POROUS PAVEMENTDesign, Construction, Maintenance
• Components of a porous pavementsystem
• Performance• Design considerations• Constructing a porous pavement system
• Ensuring long life through propermaintenance
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
26/52
OHIO RIDES ON USOHIO RIDES ON US
Stormwater Quantity Control
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
27/52
OHIO RIDES ON USOHIO RIDES ON US
Pollutant Removal
-20
0
20
40
60
80
100
120
T o
t a l
P h o s p
h o r u
s
S o
l u a
b l e
P h o s p
h o r u
s
T o
t a l
N i t r o g e n
N i t r a t e
Z i n
k
T S S M
e d i a n
P o
l u t a n
t R
e m o v a
l E f f i c i e n c y
Infiltration Wetlands Wet Ponds Filtering Swales Dry Ponds
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
28/52
OHIO RIDES ON USOHIO RIDES ON US
TSS Removal Efficiencies
100
90
80
70
60
5040
30
20
100
T S S %
R e m o v a
l E f f i c i e n c y
Source: University of New Hampshire Storm Water Center
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
29/52
OHIO RIDES ON USOHIO RIDES ON US
Pavement Longevity
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
30/52
OHIO RIDES ON USOHIO RIDES ON US
Pavement Longevity
Porous Pavement – No maintenance treatments
Dense-graded Pavement – Two maintenance treatments
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
31/52
OHIO RIDES ON USOHIO RIDES ON US
POROUS PAVEMENTDesign, Construction, Maintenance
• Components of a porous pavementsystem
• Performance• Design considerations• Constructing a porous pavement system
• Ensuring long life through propermaintenance
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
32/52
OHIO RIDES ON USOHIO RIDES ON US
Design Considerations• Porous pavements can be designed as
infiltration OR detention systems• UNHSC research indicates some
infiltration will occur even in low-permeability, clay-like soils. – TANK project confirms infiltration occurs in
poor draining soil
– Build in failsafe (e.g. underdrains,catchbasins, etc)
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
33/52
OHIO RIDES ON USOHIO RIDES ON US
Failsafe
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
34/52
OHIO RIDES ON USOHIO RIDES ON US
Failsafe
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
35/52
OHIO RIDES ON USOHIO RIDES ON US
Design Considerations• Soil bed must be designed to be flat to
maximize infiltration area. Step pavementto assure flat surface.
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
36/52
OHIO RIDES ON USOHIO RIDES ON US
Design Considerations
• Provide a pavement structure that willcarry paving equipment without distorting. – Avoid thick courses (> 3 inches) of single size
aggregate such as no. 57
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
37/52
OHIO RIDES ON USOHIO RIDES ON US
POROUS PAVEMENTDesign, Construction, Maintenance
• Components of a porous pavementsystem
• Performance• Design considerations• Constructing a porous pavement system
• Ensuring long life through propermaintenance
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
38/52
OHIO RIDES ON USOHIO RIDES ON US
Constructing a Porous PavementSystem
• Build porous pavement last – Protect from construction debris – Protect from debris laden runoff
• Protect site from heavy equipment – Avoid compaction of subgrade by construction
equipment
• Excavate to subgrade using soft footprint
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
39/52
OHIO RIDES ON USOHIO RIDES ON US
Constructing a Porous PavementSystem
• Place filter fabric, ensuring fabric extendsabove excavation to protect pavementuntil vegetation is established
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
40/52
OHIO RIDES ON USOHIO RIDES ON US
Constructing a Porous PavementSystem
• Compaction ofasphalt mixes iscrucial toperformance
• Asphalt bindercontent is 6.0min. Source:
University ofNew
HampshireStorm Water
Center
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
41/52
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
42/52
OHIO RIDES ON USOHIO RIDES ON US
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
43/52
OHIO RIDES ON USOHIO RIDES ON US
Regularly sweep, vacuum or blowpavement to remove leaves, needlesor other debris that can clog.
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
44/52
OHIO RIDES ON USOHIO RIDES ON US
Regularly sweep, vacuum or blowpavement to remove leaves, needlesor other debris that can clog.
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
45/52
OHIO RIDES ON USOHIO RIDES ON US
Snow & IceWeighted Skid Resistance (BPN)
01020304050
60708090
100
100 50 25 0
% Salt Application
S k i d R e s i s t a n c e ( B P N )
Dense Mix Asphalt
Porous Asphalt
0102030405060708090
100
100 50 25 0
% I c
e C o v e r
% Salt Application
% Ice Cover
Dense Mix Asphalt
Porous AsphaltConventionaldense-graded mix
PorousasphaltSource: University of New
Hampshire Storm Water
Center
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
46/52
OHIO RIDES ON USOHIO RIDES ON US
Resources
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
47/52
OHIO RIDES ON USOHIO RIDES ON US
Resourceshttp://www.flexiblepavements.org
Porous Asphalt Use – Light Duty
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
48/52
OHIO RIDES ON USOHIO RIDES ON US
Porous Asphalt Use Light DutyParking Facility
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
49/52
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
50/52
OHIO RIDES ON USOHIO RIDES ON US
Porous Asphalt Parking Facility atMunroe Falls Metro Park
Contractor: Perrin Asphalt
Porous Asphalt Use – Light Duty
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
51/52
OHIO RIDES ON USOHIO RIDES ON US
Porous Asphalt Use Light DutyParking Facility
Munroe Falls Metro Park – Perrin Asphalt
-
8/18/2019 Porous Asphalt Pavements ppt.pdf
52/52
AMERICA RIDES ON US AMERICA RIDES ON US
Questions ?