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 !
