njdot
North East Pavement Preservation Partnership - 2017 NJDOT Report
Krishna Tripathi NJDOT Maintenance Engineering & Operations
Agenda
Types of Pavement Preservation
High Performance Thin Overlay (HPTO)
Ultra Thin Friction Course (UTFC)
Micro Surfacing/Slurry Seal
Chip Seal (Asphalt Rubber or Polymer Modified)
Stats
Acknowledgments
Questions?
NJDOT Preservation Treatments High Performance Thin Overlay (HPTO)
Most frequently used preservation treatment.
Thin Lift ≤ 1 inch
PG 76-22 (or PG 64E-22) asphalt binder
4.75 mm nominal maximum size aggregate
Performance – Rutgers preliminary performance study shows that treatment timing is critical
SDI < 2.4 = 5 years service life
SDI > 2.4 = 13 years service life
Benefits:
Obstacles:
Improves ride quality
ADA
Seals out water
Quick open to traffic
Storm water Management Regulations
Minimal to zero RAP
NJDOT Preservation Treatments Ultra Thin Friction Course (UTFC)
Utilizes single piece equipment
Thin lift from ½” to 1”
Applicable to asphalt or concrete pavement
Benefits:
Obstacles:
Higher pavement surface friction numbers
2 recent projects – 1 success and 1 failure
Quick open to traffic
Mix is difficult for some suppliers to make
Ensures bond with existing pavement
Improves surface strength and ride quality
Aggregate shape and gradation is critical to success
Aggregate crushing operation is critical
Seals out water and no rolling noise
Service life 10 to 15 years
Refined specification to better control gradation
Minimal to zero RAP
ADA
Storm water Management Regulations
NJDOT Preservation Treatments Micro Surfacing/Slurry Seal
Many successful projects ranging from Interstates to lower volume land service
Low to moderate distress and narrow crack width pavement
Good for longitudinal joint filler/repair, rumble strip fill up to 24” wide
Benefits:
Obstacles:
Some ride quality improvement
Most temperature sensitive
No ADA upgrades with Slurry Seal
Customer expectations
Seals out water
Minimum to no RAP
ADA (Micro)
Cost effective
NJDOT Preservation Treatments Chip Seal (Asphalt Rubber or Polymer Modified)
Two step process
Step 1: Binder application
Step 2: Thin layer of crushed rock
Pilot project planned for this construction season using both mixes
Benefits:
Potential Obstacles:
No water penetration
Spray paver required
Some ride quality improvement
Customer expectations
Provides high skid resistance surface
Cost effective
Multi-Year Status of State Highway System 60 Deficient
% of System Lane Miles
50
40
49
49
40
Fair
Good
49
49
20% increase in “good” & 20% decrease in “deficient”
53 50
50
47
41
41 39
30
30
20
20 15 10
10
44 40
36 31
11
42
32 29
28 25
27
30 28
31
32
35 3332
28 25
21
16
12
0 2004
2005
2006
2007
2008 2009 2010 2011 Data Collection Cycle
2012
2013
2014
2015
2016
Source: NJDOT Pavement Management
Acknowledgement Robert Philip
Blight – NJDOT Pavement Design
Bertucci, P.E. – NJDOT Pavement Management
Dr.
Tom Bennert – Rutgers University
Dr.
Nick Vitillo – Rutgers University
Thank You!
Krishna Tripathi NJDOT Maintenance Engineering & Operations
Agenda
Types of Pavement Preservation
High Performance Thin Overlay (HPTO)
Ultra Thin Friction Course (UTFC)
Micro Surfacing/Slurry Seal
Chip Seal (Asphalt Rubber or Polymer Modified)
Stats
Acknowledgments
Questions?
NJDOT Preservation Treatments High Performance Thin Overlay (HPTO)
Most frequently used preservation treatment.
Thin Lift ≤ 1 inch
PG 76-22 (or PG 64E-22) asphalt binder
4.75 mm nominal maximum size aggregate
Performance – Rutgers preliminary performance study shows that treatment timing is critical
SDI < 2.4 = 5 years service life
SDI > 2.4 = 13 years service life
Benefits:
Obstacles:
Improves ride quality
ADA
Seals out water
Quick open to traffic
Storm water Management Regulations
Minimal to zero RAP
NJDOT Preservation Treatments Ultra Thin Friction Course (UTFC)
Utilizes single piece equipment
Thin lift from ½” to 1”
Applicable to asphalt or concrete pavement
Benefits:
Obstacles:
Higher pavement surface friction numbers
2 recent projects – 1 success and 1 failure
Quick open to traffic
Mix is difficult for some suppliers to make
Ensures bond with existing pavement
Improves surface strength and ride quality
Aggregate shape and gradation is critical to success
Aggregate crushing operation is critical
Seals out water and no rolling noise
Service life 10 to 15 years
Refined specification to better control gradation
Minimal to zero RAP
ADA
Storm water Management Regulations
NJDOT Preservation Treatments Micro Surfacing/Slurry Seal
Many successful projects ranging from Interstates to lower volume land service
Low to moderate distress and narrow crack width pavement
Good for longitudinal joint filler/repair, rumble strip fill up to 24” wide
Benefits:
Obstacles:
Some ride quality improvement
Most temperature sensitive
No ADA upgrades with Slurry Seal
Customer expectations
Seals out water
Minimum to no RAP
ADA (Micro)
Cost effective
NJDOT Preservation Treatments Chip Seal (Asphalt Rubber or Polymer Modified)
Two step process
Step 1: Binder application
Step 2: Thin layer of crushed rock
Pilot project planned for this construction season using both mixes
Benefits:
Potential Obstacles:
No water penetration
Spray paver required
Some ride quality improvement
Customer expectations
Provides high skid resistance surface
Cost effective
Multi-Year Status of State Highway System 60 Deficient
% of System Lane Miles
50
40
49
49
40
Fair
Good
49
49
20% increase in “good” & 20% decrease in “deficient”
53 50
50
47
41
41 39
30
30
20
20 15 10
10
44 40
36 31
11
42
32 29
28 25
27
30 28
31
32
35 3332
28 25
21
16
12
0 2004
2005
2006
2007
2008 2009 2010 2011 Data Collection Cycle
2012
2013
2014
2015
2016
Source: NJDOT Pavement Management
Acknowledgement Robert Philip
Blight – NJDOT Pavement Design
Bertucci, P.E. – NJDOT Pavement Management
Dr.
Tom Bennert – Rutgers University
Dr.
Nick Vitillo – Rutgers University
Thank You!
