Cold Recycling a method of road construction with low CO 2
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1 Cold Recycling a method of road construction with low CO 2 Martin Diekmann Developments in Asphalt Plant and Equipment London, October 24, 2013
2 Conventional road construction Excavating Transport CO 2 Transport Crushing Loading Asphalt plant
3 Cold Recycling in situ Binding Agent cement water Asphalt course with granular base + = emulsion foamed bitumen water water cement emulsion water Bound granular base course Milled material cement foamed bitumen water
4 Cold Recycling in situ Foamed Bitumen Hot Bitumen Water Air Foamed Bitumen The larger surface area allows the mixing of bitumen with cold and damp aggregate
5 WR WM 1000 Cold Recycling of a main traffic road Darstellung eines Kaltrecyclingzuges bestehend aus WR 4200 Bitumentanker und Zement-Suspensionsmischer High performance recycling by using cement suspension and foam bitumen
6 Cold recycler WR 4200 A cold recycler with twin shaft pugmill mixer Microprocessorcontrolled pump for injecting water to produce foamed bitumen Hose connection at bitumen tanker Microprocessor-controlled pump for the addition of hot bitumen Hose connection at slurry mixer WM 1000 Microprocessorcontrolled pump of WM 1000 for injecting the cement-water slurry Paving screed Spreading auger Working direction Recycled construction material mix Twin-shaft compulsory mixer Fixed milling drum Variable milling drums Distressed asphalt layer
7
8 WR 4200 Cold Recycling Highway I 80 in California Recycling by using the WR4200 cement suspension and foam bitumen
9 Steps of conventional structural rehabilitation Milling out I II
10 CO 2 - Emission conventional Asphalt kgco 2 /m² Transport Bitumen 4 Aggregate 2 0 Milling Paving Milling Transport Aggregate Bitumen Asphalt Paving
11 WR 4200 Cold Recycling Highway I 80 in California
12 Steps of cold recycling I/ II III IV
13 CO 2 - Emission Cold Recycling KgCO 2 /m² Milling Transport Recycler Raw Material Milling Transport Recycler Raw Material Bitumen Asphalt Paving Bitumen Asphalt Paving
14 Material comparison for m² Conventional Cold recycling Milled Asphalt t t -85% Bitumen t t -28% Additional material t t -75% Transport Km Km -85% (18 t LKW) (35 km round trip)
15 CO 2 comparision Kg CO /m² Bitumen Recycling Asphalt Conventional 6 4 Transport Raw Material 2 0 Milling Recycler Paving Milling Transport Recycler Raw Material Bitumen Asphalt Paving
16 30 30, % 15 9, BMW kg CO 2 /100km kg CO 2 / m² Cold recycling total kg CO 2 / m² Conventional Total
17 WR 4200 Production of a CTB in cold recycling method Milling and paving of the material up to the guide rail
18 WR 4200 Production of a CTB in cold recycling method Paving with the Voegele screed AB 500 TV
19 WR 4200 Production of a CTB in cold recycling method Uppermost accuracy during paving
20 WR 4200 Coldrecycling B52 in Germany Coldreycling train in operation, B52 near Trier
21 WR 4200 Coldrecycling B52 in Germany Cold mixture leaves the WR 4200 pre-compacted and pre-paved
22 WR WM 1000 Coldrecycling of a highway I 80 in California Recycling of a highway in USA
23 WR WM 1000 Coldrecycling of a highway I 80 in California Paving screed equipped with ultra sonic levelling sensor
24 WR WM 1000 Coldrecycling of a highway I 80 in California Milling and paving of the material up to the guide rail
25 WR WM 1000 Coldrecycling of a highway I 80 in California Closed surface after compaction
26 WR WM 1000 Coldrecycling of a highway I 80 in California Road lanes without any further overlay released for traffic
27 Main advantages of the cold recycling in situ Very efficiency in comparison with conventional methods Protection of resources e.g. additives and binding agents Considerable reduction of CO 2 emission Reduction of transport volume Less exposure of the excisting road network Reduction of dumpsite volume Fast construction progess shorter construction time, less obstruction of traffic According to the waste act the recycling is definitely prioritise compared to the disposal
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