Hot-In-Place-Recycling Process
Hot-In-Place-Recycling A Valuable Tool For Denver Pavement Preservation Pat Kennedy, PE Denver Street Maintenance 2014 International & Western States In-Place-Recycling Conference Denver, CO.
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
2 2
Denver • Population 634,000 – Metro area 2.5M • Street network 6,100 lane miles • Capital Maintenance Budget $23M annually • 2014 paving program; – – – –
August 6, 2014
Self performed Mill and Overlay; Contracted Mill and Overlay; Hot-In-Place-Recycle; Chip Seal;
210 ln-mi 28 ln-mi 109 ln-mi 50 ln-mi
2014 International & Western States In-Place-Recycling Conference
53% 7% 27% 13%
3
Denver
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
4
Denver
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
5
Agenda • • • • • •
August 6, 2014
Pavement Management in 30 seconds Hot-In-Place-Recycling Process Unique Considerations Life Cycle Sustainability Economics
2014 International & Western States In-Place-Recycling Conference
6
Mid-Range Treatment
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
12
Urban Pavement Management Deterioration Curve 100.00 90.00 80.00
PCI
70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Age in Years
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
14
HIPR/M&O Compared Trigger Point HIPR • Fair to slightly Poor • Few structural defects • PCI 60 to 70
August 6, 2014
M&O • Poor to Very Poor • Structural defects • PCI > 65
2014 International & Western States In-Place-Recycling Conference
15
HIPR/M&O Compared Milling/Prep HIPR • Edge mill only • Minor patching
August 6, 2014
M&O • Full width milling • Possible extensive patch
2014 International & Western States In-Place-Recycling Conference
16
HIPR/M&O Compared Paving Train HIPR • Pre heater • Recycler/Laydown • Three rollers – Breakdown – Rubber Tire – Finish
August 6, 2014
M&O • Tack • Laydown • Three rollers – Breakdown – Rubber Tire – Finish
2014 International & Western States In-Place-Recycling Conference
17
HIPR Preheater
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
18
HIPR Paver
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
19
HIPR Paving Train
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
20
Unique Considerations • Traffic Control- No special needs • Street selection- No cul-de-sacs or tight curves, uniform width, x-slope
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
21
Typical Neighborhood
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
22
Unique Considerations • Traffic Control- No special needs • Street selection- No cul-de-sacs or tight curves, uniform width, x-slope • Vegetation- Minor protection of street side plants
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
23
Unique Considerations • Traffic Control- No special needs • Street selection- No cul-de-sacs or tight curves, uniform width, x-slope • Vegetation- Minor protection of street side plants • Specialized mixes – SMA – AR – RAS
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
24
Specialized Mixes 2006 SMA- Major Arterial- 20,000+ AADT each direction
Current PCI ~75
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
25
Specialized Mixes 2007 AR- Major Arterial- 10,000 AADT each direction
Current PCI ~70
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
26
Specialized Mixes 2010 RAS- Minor Arterial- 5,000 AADT one way
Current PCI ~85
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
27
Denver Asphalt Plant • City owned Astec asphalt plant • Standard HMA and specialty mixes • Less expensive – Production costs – Wait times – Hauling costs
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
28
Life Cycle Arterials- Track record of 10 years on arterials
2005 Process 10,000 AADT PCI ~75 August 6, 2014
2003 Process 10,000 AADT PCI ~70
2014 International & Western States In-Place-Recycling Conference
29
Life Cycle Collectors- Track record of 10 years on collectors
2003 Process 3,000 AADT PCI ~70
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
30
Life Cycle Locals- ??? Haven’t seen full life, some sites covered with chip seal at 7 years
Local streets, 2003 HIPR, average PCI 75
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
31
Sustainability • Less disruption • Smooth surface – 40% IRI improvement, 265 in/mi to 165 in/mi
• Less use of raw materials – One half existing pavement reuse – One half added pavement at 25% RAP
Final product 60%+ recycled material August 6, 2014
2014 International & Western States In-Place-Recycling Conference
32
Economics • • • •
Reduced Mill/Prep Reduced raw materials Reduced hauling Unit cost $1 to $2 per sy less than m&o
Life cycle cost savings of 6%-10% Compared to mill and overlay August 6, 2014
2014 International & Western States In-Place-Recycling Conference
33
Economics Year
August 6, 2014
Ln-Mi
Cost/sy
15yr cost
M&O
17yr cost
Savings
2004
51.85 $
4.19 $
0.28
2005
63.53 $
5.09 $
0.34
2006
57.94 $
6.22 $
0.41
2007
53.53 $
7.68 $
0.51
2008
113.17 $
7.87 $
0.52
2009
54.83 $
8.55 $
0.57
2010
81.94 $
7.71 $
0.51 $
9.43 $
0.55 $
0.04
7.4%
2011
83.65 $
7.73 $
0.52 $
9.79 $
0.58 $
0.06
10.5%
2012
62.45 $
7.98 $
0.53 $
9.80 $
0.58 $
0.04
7.7%
2013
62.02 $
8.26 $
0.55 $
10.25 $
0.60 $
0.05
8.7%
2014
108.51 $
8.97 $
0.60 $
10.90 $
0.64 $
0.04
6.7%
2014 International & Western States In-Place-Recycling Conference
34
HIPR History
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
35
Questions? Pat Kennedy, PE Engineering Supervisor Denver Street Maintenance william.kennedy@denvergov. org 303-446-3535
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
36
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
2 2
Denver • Population 634,000 – Metro area 2.5M • Street network 6,100 lane miles • Capital Maintenance Budget $23M annually • 2014 paving program; – – – –
August 6, 2014
Self performed Mill and Overlay; Contracted Mill and Overlay; Hot-In-Place-Recycle; Chip Seal;
210 ln-mi 28 ln-mi 109 ln-mi 50 ln-mi
2014 International & Western States In-Place-Recycling Conference
53% 7% 27% 13%
3
Denver
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
4
Denver
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
5
Agenda • • • • • •
August 6, 2014
Pavement Management in 30 seconds Hot-In-Place-Recycling Process Unique Considerations Life Cycle Sustainability Economics
2014 International & Western States In-Place-Recycling Conference
6
Mid-Range Treatment
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
12
Urban Pavement Management Deterioration Curve 100.00 90.00 80.00
PCI
70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Age in Years
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
14
HIPR/M&O Compared Trigger Point HIPR • Fair to slightly Poor • Few structural defects • PCI 60 to 70
August 6, 2014
M&O • Poor to Very Poor • Structural defects • PCI > 65
2014 International & Western States In-Place-Recycling Conference
15
HIPR/M&O Compared Milling/Prep HIPR • Edge mill only • Minor patching
August 6, 2014
M&O • Full width milling • Possible extensive patch
2014 International & Western States In-Place-Recycling Conference
16
HIPR/M&O Compared Paving Train HIPR • Pre heater • Recycler/Laydown • Three rollers – Breakdown – Rubber Tire – Finish
August 6, 2014
M&O • Tack • Laydown • Three rollers – Breakdown – Rubber Tire – Finish
2014 International & Western States In-Place-Recycling Conference
17
HIPR Preheater
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
18
HIPR Paver
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
19
HIPR Paving Train
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
20
Unique Considerations • Traffic Control- No special needs • Street selection- No cul-de-sacs or tight curves, uniform width, x-slope
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
21
Typical Neighborhood
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
22
Unique Considerations • Traffic Control- No special needs • Street selection- No cul-de-sacs or tight curves, uniform width, x-slope • Vegetation- Minor protection of street side plants
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
23
Unique Considerations • Traffic Control- No special needs • Street selection- No cul-de-sacs or tight curves, uniform width, x-slope • Vegetation- Minor protection of street side plants • Specialized mixes – SMA – AR – RAS
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
24
Specialized Mixes 2006 SMA- Major Arterial- 20,000+ AADT each direction
Current PCI ~75
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
25
Specialized Mixes 2007 AR- Major Arterial- 10,000 AADT each direction
Current PCI ~70
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
26
Specialized Mixes 2010 RAS- Minor Arterial- 5,000 AADT one way
Current PCI ~85
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
27
Denver Asphalt Plant • City owned Astec asphalt plant • Standard HMA and specialty mixes • Less expensive – Production costs – Wait times – Hauling costs
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
28
Life Cycle Arterials- Track record of 10 years on arterials
2005 Process 10,000 AADT PCI ~75 August 6, 2014
2003 Process 10,000 AADT PCI ~70
2014 International & Western States In-Place-Recycling Conference
29
Life Cycle Collectors- Track record of 10 years on collectors
2003 Process 3,000 AADT PCI ~70
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
30
Life Cycle Locals- ??? Haven’t seen full life, some sites covered with chip seal at 7 years
Local streets, 2003 HIPR, average PCI 75
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
31
Sustainability • Less disruption • Smooth surface – 40% IRI improvement, 265 in/mi to 165 in/mi
• Less use of raw materials – One half existing pavement reuse – One half added pavement at 25% RAP
Final product 60%+ recycled material August 6, 2014
2014 International & Western States In-Place-Recycling Conference
32
Economics • • • •
Reduced Mill/Prep Reduced raw materials Reduced hauling Unit cost $1 to $2 per sy less than m&o
Life cycle cost savings of 6%-10% Compared to mill and overlay August 6, 2014
2014 International & Western States In-Place-Recycling Conference
33
Economics Year
August 6, 2014
Ln-Mi
Cost/sy
15yr cost
M&O
17yr cost
Savings
2004
51.85 $
4.19 $
0.28
2005
63.53 $
5.09 $
0.34
2006
57.94 $
6.22 $
0.41
2007
53.53 $
7.68 $
0.51
2008
113.17 $
7.87 $
0.52
2009
54.83 $
8.55 $
0.57
2010
81.94 $
7.71 $
0.51 $
9.43 $
0.55 $
0.04
7.4%
2011
83.65 $
7.73 $
0.52 $
9.79 $
0.58 $
0.06
10.5%
2012
62.45 $
7.98 $
0.53 $
9.80 $
0.58 $
0.04
7.7%
2013
62.02 $
8.26 $
0.55 $
10.25 $
0.60 $
0.05
8.7%
2014
108.51 $
8.97 $
0.60 $
10.90 $
0.64 $
0.04
6.7%
2014 International & Western States In-Place-Recycling Conference
34
HIPR History
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
35
Questions? Pat Kennedy, PE Engineering Supervisor Denver Street Maintenance william.kennedy@denvergov. org 303-446-3535
August 6, 2014
2014 International & Western States In-Place-Recycling Conference
36
