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Published byAnnabella Harrison Modified over 9 years ago
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1 SUSTAINABLE PAVEMENTS AHEAD Environmental issues: threats & opportunities; LEED for asphalt pavements The Road to the Future
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4 product 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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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 market
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6 Porous pavements manage stormwater OGFC: safe, quiet, and cool ASPHALT: environmentally sustainable pavement
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7 benefits of OGFC
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8 RAP is Nation’s No. 1 recycled material Small carbon footprint Warm Mix: reduces energy consumption ASPHALT: environmentally sustainable pavement RAP, porous, WMA, perpetual pvmts ■ Porous pavement manage stormwater ■ OGFC: safe, quiet, and cool
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10 what’s a carbon footprint ??
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11 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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12 pavement carbon footprint
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13 pavement carbon footprint
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14 pavement carbon footprint
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15 pavement carbon footprint
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16 pavement carbon footprint
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17 pavement carbon footprint
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18www.asphaltroads.org
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19 UHI UHI: misperception warmer night-time urban areas energy loads and carbon footprints
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20 UHI UHI: misperception ■ warmer night-time urban areas ■ energy loads and carbon footprints Black vs white LEED: (- 1) pt Whitescaping $$ Billions
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21 Pavement thickness Reflected UV radiation Air voids (OGFC) Scientific uncertainty re UHI impact Industry path forward
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22 components of carbon footprint Traffic Delays Mtls transportation Pavement mtls Urban Heat Island Extrapolation from Univ Cal – Berkeley study
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23Smoothness Concrete says: Pavement Type Extrapolation from Univ Cal – Berkeley study pieces of the carbon pie UHI Materials
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24 Flexible asphalt pavements cause increased fuel consumption fuel use vs pavement type Myth smoothness, NOT pavement type, is determinant for vehicle fuel consumption Fact
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25 dispelling the pavement type myth The message: smoothness matters Big-ticket item Working with stakeholders Investing resources
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26 SUSTAINABLE PAVEMENTS AHEAD LEED for asphalt pavements
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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 here
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28 LEED: Leadership in Energy & Environmental Design Developed by US Green Building Council (USGBC) Not-for-profit, like ASTM Green Building Rating SystemLEED
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29LEED
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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”
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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. shortcomings Inflexible Lack of GHG criteria Based on “value” of materials USGBC’s mission
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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 lots What does LEED do
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Test LEED for new construction buildings Distribution by geography 1-19 20-49 50-99 100-199 200+ 9 4 9 11 69 125 25 82 40 2814 8 134 186 480 22 23 57 19 6 6 18 73 102 22 11 19 120 79 119 36 52 74 95 173 174 33 105 61 27 12 9 (DE) 38 (DC) 23 (DE) 24 (NH) 5 (OK) 4 68 AK=10 HI=16 PR=1 as of 07/06 33 LEED project distribution
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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 LEED
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35 LEED Certification Levels Points Required Certified 40-49 Points Silver 50-59 Points Gold 60-79 Points Platinum 80 Points and above Projects are certified, not materials, products, companies, or individuals LEED certification levels
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36 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 process
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37 Category Possible Points Sustainable Sites:16 Water Efficiency: 5 Materials & Resources:13 Energy & Atmosphere: 17 Indoor Environ. Quality: 14 Innovation & Design: 5 LEED process
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38 LEED credit for asphalt
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39 LEED credit for asphalt
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40 LEED credit for asphalt
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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 control
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42 LEED credit for asphalt
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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-roof
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44 Surface Chip Seals and Coatings: using reflective / light-colored chip / paints Reflective pavements
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45 “Gritting”: reflective chips and aggregate Reflective pavements
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46 Shot-Blasting: abrading surface binder Reflective pavements
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47 Pavement thickness Reflected UV radiation Air voids (OGFC) Scientific uncertainty re UHI impact Industry path forward
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48 5 credits LEED credit for asphalt
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49 Category Possible Points Sustainable Sites:16 Water Efficiency: 5 Materials & Resources:13 Energy & Atmosphere: 17 Indoor Environ. Quality: 14 Innovation & Design: 5 LEED process
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50 Category Possible Points Sustainable Sites:16 Water Efficiency: 5 Materials & Resources:13 Energy & Atmosphere: 17 Indoor Environ. Quality: 14 Innovation & Design: 5 LEED process
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51 LEED credit for asphalt
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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 materials
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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 process
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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 deserved
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55 Work with the building team leader Will need LEED-accredited professional Assist with documentation of: Recycled content (RAP) Regionally acquired materials Permeability of porous asphalt pavement Solar Reflectance Index - at least 29 Other potential ID credits: WMA + high RAPdocumentation
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56 NAPA’s LEED brochure
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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”
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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 opportunities
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59 Product greening: promoting asphalt Position your product line & company Respond to concrete’s threats Scientific validity of industry-sponsored studies www.pavegreen.com Use industry tools / information: our new portal - www.pavegreen.com NAPA’s response to market challenges Get the message out: asphalt is green maximizing business opportunities
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60 Questions ?? 60 “it ain’t easy being green!”
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