1 sustainable pavements ahead environmental issues: threats & opportunities; leed for asphalt...
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SUSTAINABLE
PAVEMENTS
AHEAD
Environmental issues:Environmental issues:threats & opportunities;threats & opportunities;LEED for asphalt pavementsLEED for asphalt pavements
The Road to the FutureThe Road to the Future
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The Road to the FutureThe Road to the Future
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The Road to the FutureThe Road to the Future
4product greening is here to stayproduct greening is here to stay
Climate Change, EPA, and regulations
Projects chosen based on green: asphalt vs concrete
Legislation and DOTs using green selection metrics
Need to adapt
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Pavement selection based on green metrics
Green metrics at the local and federal level
LEED – required at all federal facilities
State DOTs, FHWA
RAP and warm mix get credit
UHI: asphalt is disadvantaged
Concrete marketing and MIT
pavement impacts on fuel use
green threats to asphalt marketgreen threats to asphalt market
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Porous pavements manage stormwater
OGFC: safe, quiet, and cool
ASPHALT: ASPHALT: environmentally sustainable environmentally sustainable pavementpavement
7benefits of OGFCbenefits of OGFC
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RAP is Nation’s No. 1 recycled material
Small carbon footprint
Warm Mix: reduces energy consumption
ASPHALT: ASPHALT: environmentally sustainable environmentally sustainable pavementpavement
RAP, porous,
RAP, porous,
WMA, perpetual
WMA, perpetual
pvmtspvmts
■ Porous pavement manage stormwater
■ OGFC: safe, quiet, and cool
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10what’s a carbon footprint ??what’s a carbon footprint ??
11what’s a carbon footprint ??what’s a carbon footprint ??
Definition:
life-cycle GHGs
Why the interest ?
lot’s of pavement
versus cement
municipalities / EPA using as metric
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0
50
100
150
200
HMA Warm Mix w/ RAP
PCC
Feedstock
Laydown
Transport
Manufacture
Aggregate
Binder
pavement carbon footprintpavement carbon footprint
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0
50
100
150
200
HMA Warm Mix w/ RAP
PCC
Feedstock
Laydown
Transport
Manufacture
Aggregate
Binder
pavement carbon footprintpavement carbon footprint
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0
50
100
150
200
HMA Warm Mix w/ RAP
PCC
Feedstock
Laydown
Transport
Manufacture
Aggregate
Binder
pavement carbon footprintpavement carbon footprint
15
0
50
100
150
200
HMA Warm Mix w/ RAP
PCC
Feedstock
Laydown
Transport
Manufacture
Aggregate
Binder
pavement carbon footprintpavement carbon footprint
16
0
50
100
150
200
HMA Warm Mix w/ RAP
PCC
Feedstock
Laydown
Transport
Manufacture
Aggregate
Binder
pavement carbon footprintpavement carbon footprint
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0
50
100
150
200
HMA Warm Mix w/ RAP
PCC
Feedstock
Laydown
Transport
Manufacture
Aggregate
Binder
pavement carbon footprintpavement carbon footprint
18www.asphaltroads.orgwww.asphaltroads.org
19UHIUHI: misperceptionUHI: misperception
warmer night-time urban areas
energy loads and carbon footprints
20UHIUHI: misperceptionUHI: misperception
■ warmer night-time urban areas
■ energy loads and carbon footprints
Black vs white
LEED: (- 1) pt
Whitescaping
$$ Billions
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Pavement thickness
Reflected UV radiation
Air voids (OGFC)
Scientific uncertainty re UHI impact
Industry path forward
22components of carbon footprintcomponents of carbon footprint
Traffic Delays
Mtls transportation
Pavement mtls
Urban Heat Island
Extrapolation from Univ Cal – Berkeley study
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SmoothnessSmoothness
Concrete Concrete says: says: Pavement Pavement TypeType
Extrapolation from Univ Cal – Berkeley study
pieces of the carbon piepieces of the carbon pie
UHI
Materials
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Flexible asphalt pavements cause increased fuel consumption
fuel use vs pavement typefuel use vs pavement type
MythMyth
smoothness, NOT pavement type, is determinant for vehicle fuel consumption
FactFact
25dispelling the pavement type mythdispelling the pavement type myth
The message: smoothness matters
Big-ticket item
Working with stakeholders
Investing resources
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SUSTAINABLE
PAVEMENTS
AHEAD
LEED for asphalt pavementsLEED for asphalt pavements
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What is LEED and how is it used
LEED categories and credits
LEED credits for asphalt
Porous pavement, UHI, RAP
LEED process
Other green roadway systems
Opportunities
Why am I hereWhy am I here
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LEED:
Leadership in Energy & Environmental Design
Developed by US Green
Building Council (USGBC)
Not-for-profit, like ASTM
Green Building Rating System
LEEDLEED
29LEEDLEED
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NAHB National Green Building Standard™
The Green Building Initiative™ - US
USEPA: guidance and programs E-star
US road construction green metrics:
– Green Roads
– NY GreenLITES
– FHWA-INVEST
other green constr “stds”other green constr “stds”
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The U.S. Green Building Council is the nation’s foremost coalition of leaders from across the building industry working to promote buildings that are environmentally responsible, profitable and healthy places to live and work.
shortcomin
shortcomin
gsgsInflexibleLack of GHG criteriaBased on “value” of materials
USGBC’s missionUSGBC’s mission
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Leadership in Energy and Environmental Design
Green Building Rating System™
Encourage / accelerate green building practices
Universal & accepted tools and criteria
THE US market-based standard to distinguish /
promote green building design
So, why are we talking about this anyway?parking
parking
lotslots
What does LEED doWhat does LEED do
TestTest
LEED for new construction buildings
Distributionby geography
1-1920-4950-99100-199200+
94
91111
69
125
2582
4028 14
8
134
186480
22
23
57
19
66
18
73
10222
11
19
12079
11936
52
74
95
173
17433105
61 2712
9 (DE) 38 (DC)
23 (DE)
24 (NH)
5 (OK)
4
68AK=10HI=16PR=1
as of 07/06
33LEED project distributionLEED project distribution
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GSA (Federal) Requires LEED Silver
Various State and Local Governments
also requiring
Some jurisdictions accept quasi LEED
Some big box builders require
Residential communities
Unprecedented interest
Who’s using LEEDWho’s using LEED
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LEED Certification LevelsLEED Certification Levels Points RequiredPoints Required
CertifiedCertified 40-49 Points40-49 Points
SilverSilver 50-59 Points50-59 Points
GoldGold 60-79 Points60-79 Points
PlatinumPlatinum 80 Points and above80 Points and above
Projects are certified, not materials, products, companies, or individuals
LEED certification LEED certification levelslevels
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5 key areas:– Sustainable site development
– Water savings
– Energy efficiency
– Materials selection
– Indoor environmental quality
Earning LEED certification– Must meet certain criteria credits / certification
– Levels based on total credits
How do asphalt pavements contribute to LEED
LEED processLEED process
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Category Possible Points
Sustainable Sites: 16
Water Efficiency: 5
Materials & Resources: 13
Energy & Atmosphere: 17
Indoor Environ. Quality: 14
Innovation & Design: 5
LEED processLEED process
38LEED credit for asphaltLEED credit for asphalt
39LEED credit for asphaltLEED credit for asphalt
40LEED credit for asphaltLEED credit for asphalt
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Sustainable Sites Credit 6.1 and 6.2
Stormwater control: quantity / quality
1 credit for each
Porous asphalt pavements qualify
NAPA has a good bit of information on constructing porous pavements
Mix design / construction practices, maintenance
SS credits: stormwater SS credits: stormwater controlcontrol
42LEED credit for asphaltLEED credit for asphalt
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Sustainable Sites Credit 7.1
Reduce UHI through pavement selection
Use light-colored/high-albedo materials (reflectance of at least 0.3) for xx% of the site’s non-roof impervious surfaces
Other strategies: undergrnd / solar parking roofs, shade trees, “open grid paving”
From 1 to 3 credits (depending on program)
SS credits: UHI non-roofSS credits: UHI non-roof
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Surface Chip Seals and Coatings:Surface Chip Seals and Coatings:using reflective / light-colored chip / paintsusing reflective / light-colored chip / paints
Reflective pavementsReflective pavements
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““Gritting”:Gritting”:reflective chipsreflective chipsand aggregateand aggregate
Reflective pavementsReflective pavements
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Shot-Blasting:Shot-Blasting:abrading surface binderabrading surface binder
Reflective pavementsReflective pavements
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Pavement thickness
Reflected UV radiation
Air voids (OGFC)
Scientific uncertainty re UHI impact
Industry path forward
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5 credits
LEED credit for asphaltLEED credit for asphalt
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Category Possible Points
Sustainable Sites: 16
Water Efficiency: 5
Materials & Resources: 13
Energy & Atmosphere: 17
Indoor Environ. Quality: 14
Innovation & Design: 5
LEED processLEED process
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Category Possible Points
Sustainable Sites: 16
Water Efficiency: 5
Materials & Resources: 13
Energy & Atmosphere: 17
Indoor Environ. Quality: 14
Innovation & Design: 5
LEED processLEED process
51LEED credit for asphaltLEED credit for asphalt
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RAP = recycled content category
Nation’s No. 1 recycled material
Identify materials manufactured and
extracted regionally (within 500 miles)
Easy (partial) credits to get
RAP & regional RAP & regional materialsmaterials
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Category Possible Points
Sustainable Sites: 16
Water Efficiency: 5
Materials & Resources: 13
Energy & Atmosphere: 17
Indoor Environ. Quality: 14
Innovation & Design: 5
5
+
8
__
from
asphalt
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LEED processLEED process
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Credit based on value
Pavement is relatively inexpensive
Even 100% RAP – minimal LEED “value”
Same with Regional Materials / Reuse
Used to supplement
Debatable whether true “green” practice
Why not a “carbon footprint” approach ?
What about Warm Mix: ID credit request
– 40% GHG reduction (~ 40% RAP + WMA)
doesn’t get credit doesn’t get credit deserveddeserved
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Work with the building team leaderWill need LEED-accredited professional
Assist with documentation of:Recycled content (RAP)Regionally acquired materialsPermeability of porous asphalt pavement
Solar Reflectance Index - at least 29
Other potential ID credits: WMA + high RAP
documentationdocumentation
56NAPA’s LEED brochureNAPA’s LEED brochure
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University of Washington: GreenRoads
Provides a “LEED Like” measurement tool for highway material selection
EPA / FHWA Green Highways - INVEST
Focuses on “best practices”
European Road Authority directives
Focusing on “carbon footprint” LCA
Other systems coming: NY- GreenLITES
other “green” road “stds”other “green” road “stds”
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Familiarize yourself with green-building lingo
Seek-out green-building Stakeholders
– (landscape) architects, developers
– Municipal leaders
Promote “common-sense” vs LEED criteria
– Municipalities have leeway to define “green”
– RAP and OGFC/porous pvmt are GREEN
Recycle, safety, noise, water quality, WMA
Understand / promote GHG / carbon footprints
LEED opportunitiesLEED opportunities
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Product greening: promoting asphalt
Position your product line & company
Respond to concrete’s threats Scientific validity of industry-sponsored studies
Use industry tools / information: our new portal - www.pavegreen.comwww.pavegreen.com
NAPA’s response to market challenges
Get the message out: asphalt is green
maximizing business opportunitiesmaximizing business opportunities
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Questions ??
““it ain’t easy being green!”it ain’t easy being green!”