RECYCLING IN PAVEMENTS THE BIG PICTURE WIDE WORLD OF WASTE

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1 RECYCLING IN PAVEMENTS THE BIG PICTURE WIDE WORLD OF WASTE 2012 Recycling Council of Alberta Conference Jasper Park Lodge Jasper, Alberta Art Johnston, C.E.T. Principal, Transportation Practice EBA, A Tetra Tech Company

2 ONE MAN S TRASH IS ANOTHER MAN S TREASURE American Proverb WE RE NOT BAD BUT WE COULD BE BETTER! 2

3 WHY? We use a LOT OF STUFF! Virgin materials are becoming scarce Increased disposal costs Societal pressure IT S THE RIGHT THING TO DO! 3

4 Baghouse Fines Kiln Dust Nonferrous Slags Sewage Sludge Ash Scrap Tires Reclaimed Concrete Material Sulphate Wastes Waste Glass Mineral Processing Wastes Blast Furnace Slag FGD Scrubber Material Quarry Byproducts Coal Bottom Ash Steel Slag Reclaimed Asphalt Pavement Roofing Shingle Scrap MSW Combustor Ash Foundry Sand Fly Ash 4

5 BY-PRODUCT EVALUATION PROCESS Characterize Material Select Appropriate Application Environmental Issues (Approvals, etc.) Economic Assessment (Life Cycle) Laboratory Evaluation Field Scale Installation and Monitoring 5

6 ASPHALT CONCRETE PAVEMENT Baghouse Fines, Blast Furnace Slag, Coal Bottom Ash / Boiler Slag, Coal Fly Ash, Foundry Sand, Kiln Dust, Mineral Processing Wastes, MSW Combustor Ash, Nonferrous Slags, Reclaimed Asphalt Pavement (hot and cold), Roofing Shingle Scrap, Scrap Tires, Sewage Sludge Ash, Steel Slag, Waste Glass 6

7 CONCRETE PAVEMENT Blast Furnace Slag, Coal Fly Ash, Foundry Sand GRANULAR BASE Blast Furnace Slag, Coal Bottom Ash, Boiler Slag, Mineral Processing Wastes, MSW Combustor Ash, Nonferrous Slags, Reclaimed Asphalt Pavement, Reclaimed Concrete Material, Steel Slag, Waste Glass 7

8 EMBANKMENT OR FILL Blast Furnace Slag, Coal Bottom Ash, Boiler Slag, Coal Fly Ash, Foundry Sand, Mineral Processing Wastes, Nonferrous Slags, Reclaimed Asphalt Pavement, Reclaimed Concrete Material, Scrap Tires 8

9 So Art. what is the WEIRDEST thing you ever heard of? 9

10 POTICRETE A NEW INNOVATIVE CONCRETE MIX 10

11 COLD IN-PLACE RECYCLING 11

12 FULL DEPTH RECLAMATION 12

13 HOT IN-PLACE RECYCLING 13

14 ASPHALT RUBBER 14

15 SOIL STABILIZATION 15

16 BOTTOM ASH FROST PROTECTION 16

17 MODIFIED FULL DEPTH RECLAMATION 17

18 COLD MIX ASPHALT USING SAGD BY-PRODUCT 18

19 WHAT ARE THE BENEFITS? 19

20 PRESERVE NON-RENEWABLE RESOURCES AGGREGATE & BITUMEN 20

21 GHG Emissions CO2 eq kg/tonne Hot Mix Asphalt (HMA) High modulus HMA 50 Croteau & Chaignon 2009 CUPGA HMA with 15% RAP Crushed aggregate 0-20 mm 10 Aggregate mm Cement Concrete 180 Continuous reinforced concrete Stabilized materials emulsion + cement Stabilized materials emulsion Crushed in place concrete slab (rubblizing) 10 Reclaimed or milled materials 21 21

22 REDUCED COSTS 22

23 WHAT ARE THE OBSTACLES? 23

24 Linear-Landfill Phobia Not in My Road Mentality Hesitancy to use High % RAP HMA/WMA Environmental Regulations Region Specific Byproducts Lack of Performance Experience Quantification of Environmental Benefits 24

25 NEW TOOLS Life Cycle Cost Analysis (LCCA) including not only Pavement Economics but Environmental Economics (Energy Consumption, Emissions, etc.) 25

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29 Remember; it doesn't have to be perfect to last a long time! ajohnston@eba.ca