1

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

2

The Road to the FutureThe Road to the Future

3

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

5

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

6

Porous pavements manage stormwater

OGFC: safe, quiet, and cool

ASPHALT: ASPHALT: environmentally sustainable environmentally sustainable pavementpavement

7benefits of OGFCbenefits of OGFC

8

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

9

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

12

0

50

100

150

200

HMA Warm Mix w/ RAP

PCC

Feedstock

Laydown

Transport

Manufacture

Aggregate

Binder

pavement carbon footprintpavement carbon footprint

13

0

50

100

150

200

HMA Warm Mix w/ RAP

PCC

Feedstock

Laydown

Transport

Manufacture

Aggregate

Binder

pavement carbon footprintpavement carbon footprint

14

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

17

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

21

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

23

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

24

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

26

SUSTAINABLE

PAVEMENTS

AHEAD

LEED for asphalt pavementsLEED for asphalt pavements

27

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

28

LEED:

Leadership in Energy & Environmental Design

Developed by US Green

Building Council (USGBC)

Not-for-profit, like ASTM

Green Building Rating System

LEEDLEED

29LEEDLEED

30

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”

31

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

32

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

34

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

35

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

41

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

43

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

46

Shot-Blasting:Shot-Blasting:abrading surface binderabrading surface binder

Reflective pavementsReflective pavements

47

Pavement thickness

Reflected UV radiation

Air voids (OGFC)

Scientific uncertainty re UHI impact

Industry path forward

48

5 credits

LEED credit for asphaltLEED credit for asphalt

49

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

50

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

52

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

53

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

13

LEED processLEED process

54

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

55

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

57

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”

58

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!”