Greenroads™ Manual v1.5 Materials & Resources MR-4 Recycled Materials RECYCLED MATERIALS GOAL Reducelifecycleimpactsfromextractionandproductionofvirginmaterials. CREDIT REQUIREMENTS Userecycledmaterialsasasubstituteforvirginmaterials.Thefractionofrecycled materialsusedcanbecalculatedusingoneoffouroptionsbelow: 1. Consideronlythepavementbindermaterials.Thistypicallymeansthecementor asphaltinthepavementsection.Noothermaterials(e.g.,aggregateinthe pavement,granularbase,fill,walls,bridge, signs, other structures, etc.) are considered. 2. Consideronlythehotmixasphalt(HMA)orportlandcementconcrete(PCC) pavementmaterials.ThisencompassesthematerialinOption1plustheaggregate aswellasanyotheradditivematerials.Noothermaterials(e.g.,granularbase,fill, walls,bridge,signs,otherstructures,etc.)areconsidered. 3. Considerallpavementmaterialsincludinggranularbaselayers.Thisencompasses thematerialinOptions1and2plusthegranularbaselayers(eitherunboundor boundwithabindingagentsuchaslime,cementorasphaltemulsion)aswellas anyotheraddedmaterials.Noothermaterials(e.g.,fill,walls,bridge,signs,other structures,etc.)areconsidered. 4. Considerallprojectmaterials.ThisencompassesthematerialinOptions1,2and3 plus,asaminimum,allmaterialsinthefillandwallstructuresoftheproject.Other structures(e.g.,bridges)andmaterial(e.g.,signs,trafficcontroldevices,etc.)may beconsideredifdesired. Calculatetheaveragerecycledmaterialcontentbyweightusingoneoftheabovefour methodsandEquationMR4.1.TableMR4.1showsthepointscale. TableMR4.1:PointsforAverageRecycledContent(PercentbyWeightofMaterials) PointsEarned 1 2 3 4 5 Percentrecycledmaterialrequired forOptions1and2 10% 20% 30% 40% 50% Percentrecycledmaterialrequired forOptions3and4 20% 30% 40% 50% 60% UseEquationMR4.1tocomputetheaveragerecycledcontent(ARC)thatwillbe achievedbythepavementsectionorbythebinders. (EquationMR4.1) Where: r n isthetotalweightofrecycledmaterialsforthatindividualmaterialorassembly W n isthetotalweightofeachindividualmaterialorassembly nrepresentsthenumberofmaterialsusedinthepavementsection Details Itmaybedifficulttomeasuretherecycledcontentofamaterialinplace.Forthe MR-4 1-5 POINTS RELATED CREDITS PR2LifecycleCost Analysis PR3Lifecycle Inventory MR1Lifecycle Assessment MR2Pavement Reuse PT3WarmMix Asphalt SUSTAINABILITY COMPONENTS Ecology Economy Expectations Experience BENEFITS ReducesRaw Materials ReducesAir Emissions Reduces Greenhouse Gases ReducesSolidWaste (Equa tion MR 4.1) Where:
RECYCLED MATERIALS
Jun 24, 2023
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