Asphaltrecycling in the Netherlands

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Transcript van de presentatie:

Asphaltrecycling in the Netherlands Harry Roos VBW-Asfalt Dutch Asphalt Pavement Association Juni, 2012

Developement / history Facts and figures Technique Requirements

Year 2010 Production RAP HMA in HMA million tons % Spain 34 3 France 39 7 Austria 8 5 USA 327 17 Germany 45 26 The Netherlands 10 32

- technique - economy - policy History Favourable circumstances (1970 -1980) - technique - economy - policy

Circumstances in the Netherlands Technique - available technique - support by the client - Dutch standard specifications

Environmental Circumstances - global environmental awareness - scarcity of quarry material - alternative construction materials

Economic Circumstances - oil crisis - high bitumen prices - return on investment - min. 50% reclaimed asphalt in specs

Summarising - accepted technology - co-operation client - industry - environmental policy - scarcity of natural aggregates - waste reduction - oil crises

Today's incentives - Dumping not allowed - Economic value - Mixing plants equipped - Standard technical specifications - Green Procurement

ENVIRON-MENTALITY

Facts and figures - production HMA 8 - 9 million tns/yr - 40 asphalt mixing plants equipped for recycling - RAP 3.5 - 4 million tns/yr

% RAP in HMA % parallel drum %

Availability - right place - right time - right quantity - right quality

Requirements for RAP - reclaimed bitumen quality - aggregate size - aggregate shape - no pollution - no tar - homogeneity

Preparing valuable material Quality! Pavement demolition = Preparing valuable material 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

Waterdamp Schoorsteen Eigen vulstof Fabrieks- vulstof Warme ladder Ontstoffing Zeefhuis Bitumentanks Voorraadsilo’s warm zand, grind, steenslag Voordoseurs oud asfalt Verwarmingstrommel oud asfalt (paralleltrommel) Weegbak Eindsilo warm asfalt Mengbak Voordoseurs nieuwe grondstoffen Droogtrommel nieuwe grondstoffen zand grind steenslag zand Ophaalbak Nieuwe grondstoffen Bitumen Verbrandingsgassen en stof Brandervlam Oud asfalt Vulstof Afgevangen zand

Percentage RAP in Mix Subbase > 50 % (98 %) Binder 45 % (90 %) Wearing course 35 % (50 %) Porous asphalt 30 % (20 %) Stonemastic asphalt 25 % ( 1 %)

hot mix with reclaimed asphalt hot mix with 100% new materials Requirements for hot mix with reclaimed asphalt = hot mix with 100% new materials

Performance based requirements Possible solution Recipe approach Performance based requirements

Conclusions Success-factors - acceptance of technique - environ-mentality - co-operation - return on investment - market

recycling