Roofing Shingles in HMA:Practical Research Applications

by Scott Shuler

Recycled Asphalt Shingles in HMA UpdateRocky Mountain Asphalt Conference and Equipment Show

Objective

• Demonstrate Utility of Roofing Shingles in HMA– Mixture Designs– Production– Laydown– Performance

Performance

• Build Three Experimental Pavements– Evaluate Pre-Condition

• Monitor Performance

Experimental Pavements

• Full-Depth New Construction– 63rd Street, Boulder

• Thin Overlay– Red Rocks Park, Golden

• Mill and Fill– Villanova Circle, Aurora

63rd Street, Boulder

Construction Process

• Chop Up Shingles (RAS Manufacturing Waste)

• Mix Shingles 1:1 With Sand• Add Through RAP Collar

– 4% RAS by weight of mix

• Transport/Laydown/Compact

Shingle Handling

Shingle Handling

Shingle Handling

Shingle Handling

Shingle Handling

Shingle Handling

Materials Properties63rd Street

0

10

20

30

40

50

60

70

80

90

100

0.01 0.1 1 10 100

Sieve, mm

Pass

ing

, %

200 50 16 4 1/2 1-1/2

G-Base0.80% VTM11.3% VMA

SX-Surface

Laydown-Compaction

Laydown-Compaction

Laydown-Compaction

Laydown-Compaction

Red Rocks Park, Golden

Pavement Condition

Pavement Condition

Pavement Condition

Construction Process

• Chop Up Shingles (RAS Manufacturing Waste)

• Mix Shingles 1:1 With Sand• Add Through RAP Collar

– 4% RAS by weight of mix

• Transport/Laydown/Compact

Villanova Circle, Aurora

Villanova Circle, Aurora

Construction Process

• Chop Up Shingles (RAS Post Consumer)

• Add Through RAP Collar– 5% RAS by weight of mix

• Transport/Laydown/Compact

Construction Process

• Chop Up Shingles (RAS Post Consumer)

• Add Through RAP Collar– 5% RAS by weight of mix

• Transport/Laydown/Compact

Construction Process

• Chop Up Shingles (RAS Post Consumer)

• Add Through RAP Collar– 5% RAS by weight of mix

• Transport/Laydown/Compact

Construction Process

• Chop Up Shingles (RAS Post Consumer)

• Add Through RAP Collar– 5% RAS by weight of mix

• Transport/Laydown/Compact

Construction Process

• Chop Up Shingles (RAS Post Consumer)

• Add Through RAP Collar– 5% RAS by weight of mix

• Transport/Laydown/Compact

Construction Process

• Chop Up Shingles (RAS Post Consumer)

• Add Through RAP Collar– 5% RAS by weight of mix

• Transport/Laydown/Compact

Acknowledgements

Acknowledgements

City of Boulder, CO

Acknowledgements

City of Boulder, CO City and County of Denver, CO

Acknowledgements

City of Boulder, CO City and County of Denver, CO

City of Aurora, CO

Acknowledgements

City of Boulder, CO City and County of Denver, CO

City of Aurora, COAsphalt Specialties

Acknowledgements

City of Boulder, CO City and County of Denver, CO

City of Aurora, COAsphalt Specialties

Brannan Sand and Gravel

Acknowledgements

City of Boulder, CO City and County of Denver, CO

City of Aurora, COAsphalt Specialties

Brannan Sand and Gravel Colorado Department of Public Health and

Environment

Acknowledgements

City of Boulder, CO City and County of Denver, CO

City of Aurora, COAsphalt Specialties

Brannan Sand and Gravel Colorado Department of Public Health and

Environment Boulder County Resource Conservation

Division-Roofs to Roads Project.

Questions ?

Thank You !