Leadership  in  Energyand

Environmental  Design(LEED)

U.S.  Green  Building  Council

LEED

• Environmental  Scorecard  – Design

– Construc;on

– Opera;on

• Encourages  sustainable  building  and  development

• Balance  needs  of  people,  nature,  and  economy

How  Does  LEED  Work?• Suite  of  Ra;ng  Systems

– exis;ng  buildings

– core  and  shell

– schools

– retail

– health  care

– homes

– neighborhood  development

LEED  Evalua;on• Sustainable  Sites

• Water  Efficiency

• Energy  and  Atmosphere

• Materials  and  Resources

• Indoor  Environmental  Quality

• Innova;on  and  Design

LEED  Levels• Cer;fied  Green  –  28  to  32  points

• Silver  –  33  to  38  points

• Gold  –  39  to  51  points

• Pla;num  –  52  to  60  points

Peet’s Coffee & Teas Roasting FacilityAlameda, CA

LEED Gold

Source: http://construction.com/, McGraw-Hill

LEED Green

University of Arkansas Innovation Center

Source: http://construction.com/, McGraw-Hill

LEED Platinum

Clinton Library, Little Rock, AR

Source: http://www.clintonlittlerock.com/photo.asp

LEED Silver

RiverClay Condos, Denver

Source: http://construction.com/, McGraw-Hill

LEED Platinum

Armstrong Headquarters

Source: http://construction.com/, McGraw-Hill

LEED Silver – Neighborhood Development

Thorton Place, SeattleSource: http://www.djc.com/

LEED Silver

Charter Drive Medical Center, Columbia, MD

LEED Silver

Meadow Ridge Medical, Columbia, MD

LEED Platinum

Pringle Creek Development, Oregon

What  do  all  these  award  winners  have  in  common?

Eco-­‐Friendly  Parking  Stalls

Opportuni;es  for  Asphalt

Category Descrip8on Asphalt  Feature

CreditsSustainable  

SitesStormwater:  Quan;ty

Porous  Pavement

1Sustainable  Sites

Stormwater:  Quality

Porous  Pavement

1Sustainable  Sites

Heat  Island:  Non-­‐roof

Porous  Surface

Reflec;ve  Surface

1  –  3

Materials  &  Resources

Constr.  Waste RAP 1  –  2Innova;on  &  Design

Excep;onal  Performance

Warm  Mix

High  RAP  

1  –  4

LEED  Credits  from  Asphalt

• Porous  Stormwater  Management  –  2  credits

• Recycled  on-­‐site  Asphalt  -­‐  1  credit

• Use  of  local  materials  –  1  credit

• Use  of  Recycle  in  Asphalt  –  2  credit

• Warm  mix  for  reduced  emissions  –  1  credit

Porous  &  Open  Graded  Pavements•  Dense-­‐Graded  asphalt  pavements  were  historically  the      standard  for  roadways.

•  Provides  structure,  strength,  and  smoothness•  Can  cause  water  spray

•  Open-­‐Graded  Fric;on  Courses  (OGFC)  developed  to      minimize  water  spray.

•  Developed  in  the  late  1940’s  (airports)•  Pavement  contains  greater  air  voids•  Thin  OGFC  dens-­‐graded  structure

Porous Asphalt

Porous Asphalt

Port  of  Portland• 35  Acres

• Infiltrate  100%  of  the  stormwater

• saved  $250,000  –  reducing  permigng  

–  eliminated  a  stormwater  system.    

• Oregon  APWA  – Julian  Prize  for  Sustainability  

We  need  to  be  proac;ve• You  cannot  wait  for  an  opportunity  to  walk  through  the  door.

• Hire  a  LEED  consultant.• Get  involved  with  trade  associa;ons.• Get  involved  with  your  local  green  building  associa;ons  and  councils.

• Get  the  word  out  in  your  market:• Architects  –  Administrate  LEED  cer;fica;on• Engineers  –  Get  in  early  on  the  Design• Local  officials  –  County,  City,  Legislators

•  The  Road  Ahead

•  Conver8ng  to  Warm-­‐Mix  Asphalt

•  Doubling  the  Use  of  Reclaimed  Materials

•  Expanding  the  Implementa8on  of  Perpetual          Pavements

•  Accelera8ng  the  Appropriate  Use  of  Porous  &  Open  Graded  Pavements

Warm-­‐Mix  Asphalt•  Reduced  Mixing  temperatures  (50º-­‐100º  F)  

Temp  =  320º  F  Temp  =  245º  F  

Use  of  Reclaimed  Materials•  Recycled  Asphalt  Pavement  (RAP)

•  Asphalt  Roofing  Shingles  (RAS)

•  Crumb  /  Tire  Rubber

•  Glass

•  Slag

•  Foundry  Sand

Recycling  of  Asphalt  Pavement•  Made  prac8ce  in  early  1970’s

•  Long-­‐term  performance  is  proven

Recycling  of  Asphalt  Pavement

Source: Astec Industries Presentation

Recycling  of  Asphalt  Pavement•  Significant  Reduc;on  in  Greenhouse  Gas    Emissions

•  Currently  average  ~19%  na;onwide.

•  Increased  to  25%  =  10%  reduc;on  in  GHG.(=  2,000,000  Tons  Annually!)

Pavements  That  Last  a  Life8me

•  I-­‐80  in  Iowa•  Built  1964•  S;ll  in  use  today

Cri5cal  Cracking  Strain

TotalThickness

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Perpetual  Pavements

Cri5cal  Cracking  Strain

TotalThickness

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Perpetual  Pavements

TRL Report 250Nunn, Brown, Weston & Nicholls

Design of Long-Life FlexiblePavements for Heavy Traffic

www.trl.co.uk

“The deterioration ofthick, well constructed,fully flexible pavementsis not structural, butoccurs at the surface ascracking and rutting.”

Fatigue Theory for Thick PavementsHigh Strain = Short Life

Low Strain = Unlimited Life

UnlimitedFatigueLife

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Perpetual  Pavements

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High  Quality  HMA  Surface  Course

20+  YearsLater

Perpetual  Pavements

“Green Streets” in OregonPringle Creek Community – Salem, OR

“Green Streets” in OregonPringle Creek Community – Salem, OR