Asphaltrecycling in the Netherlands

Harry Roos

VBW-Asfalt

Dutch Asphalt Pavement Association

Juni, 2012

•Developement / historyDevelopement / history

•Facts and figuresFacts and figures

•TechniqueTechnique

•RequirementsRequirements

Year 2010Year 2010 Production RAPProduction RAP

HMAHMA in HMA in HMA million tons %million tons %SpainSpain 34 34 3 3FranceFrance 39 39 7 7AustriaAustria 8 8 5 5USAUSA 327327 17 17GermanyGermany 45 45 26 26The NetherlandsThe Netherlands 10 10 32 32

HistoryHistoryFavourable circumstances (1970 -1980)Favourable circumstances (1970 -1980)

-- techniquetechnique-- economyeconomy-- policypolicy

Circumstances in the NetherlandsCircumstances in the NetherlandsTechniqueTechnique

-- available techniqueavailable technique-- support by the clientsupport by the client-- Dutch standard specificationsDutch standard specifications

Environmental CircumstancesEnvironmental Circumstances

-- global environmental global environmental awarenessawareness

-- scarcity of quarry materialscarcity of quarry material-- alternative construction alternative construction

materialsmaterials

Economic CircumstancesEconomic Circumstances

-- oil crisisoil crisis-- high bitumen priceshigh bitumen prices-- return on investmentreturn on investment-- min. 50% reclaimed asphalt in min. 50% reclaimed asphalt in

specsspecs

SummarisingSummarising

-- accepted technologyaccepted technology-- co-operation client - industryco-operation client - industry-- environmental policyenvironmental policy-- scarcity of natural aggregatesscarcity of natural aggregates-- waste reductionwaste reduction-- oil crisesoil crises

Today's incentivesToday's incentives

-- Dumping not allowedDumping not allowed-- Economic valueEconomic value-- Mixing plants equippedMixing plants equipped-- Standard technical Standard technical specificationsspecifications-- Green ProcurementGreen Procurement

ENVIRON-MENTALITYENVIRON-MENTALITY

Facts and figuresFacts and figures

-- production HMA 8 - 9 million tns/yrproduction HMA 8 - 9 million tns/yr

-- 40 asphalt mixing plants equipped40 asphalt mixing plants equippedfor recyclingfor recycling

-- RAP 3.5 - 4 million tns/yrRAP 3.5 - 4 million tns/yr

0

20

40

60

80

100

120

1996 1998 2000 2003 2004 2005 2006 2007 2008 2009 2010

%% RAP in HMA % parallel drum% parallel drum

AvailabilityAvailability

-- right placeright place-- right timeright time-- right quantityright quantity-- right qualityright quality

Requirements for RAPRequirements for RAP-- reclaimed bitumen qualityreclaimed bitumen quality-- aggregate sizeaggregate size-- aggregate shapeaggregate shape-- no pollutionno pollution-- no tarno tar-- homogeneityhomogeneity

Quality!Quality!Pavement demolitionPavement demolition

==Preparing valuable materialPreparing valuable material

No Waste!!No Waste!!

RAP = Reclaimed Asphalt Pavement

Quality test on existing pavement

RAP = Reclaimed Asphalt Pavement

Cold Milling:

Possibly in layers

RAP = Reclaimed Asphalt Pavement

Crushing

Bitumentanks

Ontstoffing

Voordoseursoud asfalt

Voordoseurs nieuwe grondstoffen

Zeefhuis

Fabrieks-vulstof

Voorraadsilo’swarm zand, grind,

steenslag

Weegbak

Mengbak

Ophaalbak

Eindsilowarmasfalt

Warme ladder

Waterdamp

Eigenvulstof

zandgrind steen-slag

zand

Verwarmingstrommeloud asfalt

(paralleltrommel)

Droogtrommelnieuwe grondstoffen

BrandervlamNieuwe grondstoffen Verbrandingsgassen en stof

Oud asfalt

Bitumen

Vulstof Afgevangen zand

Schoorsteen

Percentage RAP in Mix

Subbase > 50 % (98 %)

Binder 45 % (90 %)

Wearing course 35 % (50 %)

Porous asphalt 30 % (20 %)

Stonemastic asphalt 25 % ( 1 %)

RequirementsRequirementsfor for

hot mix with reclaimed asphalthot mix with reclaimed asphalt==

hot mix with 100% new materialshot mix with 100% new materials

Possible solutionPossible solution

Recipe approachRecipe approach

Performance based requirementsPerformance based requirements

ConclusionsConclusionsSuccess-factorsSuccess-factors-- acceptance of techniqueacceptance of technique-- environ-mentalityenviron-mentality-- co-operationco-operation-- return on investmentreturn on investment-- marketmarket