Presentation by Caltrans State Pavement Engineer Amarjeet Benipal at the California Asphalt Pavement Association Spring Conference April 25, 2013 in Ontario, CA.
6. What is Sustainability?
“Meeting the needs of the present without
compromising the ability of future generations
to meet their own needs”
World Commission on Environment and Development, 1987
7. How Is Caltrans Being Sustainable?
By building pavements to last multiple
generations, with as much recycled material
as possible.
• Quality & Performance
• Cost Effectiveness
10. Life Cycle Cost Analysis - Design
Analysis done to find the most cost effective
pavement based on cost associated with:
Initial
Cost
Maintenance
Cost
Anticipated
Rehabilitation
Cost
User
Delay
11. Sustainability – Design
Long-Life Pavement
1. Asphalt Pavement
Asphalt: I-710, I-5, I-80 etc
2. Concrete Pavement
a. Jointed Plain
b. Continuously Reinforced
c. Precast
Concrete: I-680, I-710, I-15 etc
14. Rubber Hot Mix Asphalt (RHMA)
RHMA been successfully used in CA for over 30 years.
CA generates more than 44 million scrap tires every year.
A two-inch RHMA overlay uses about 2,000 scrap tires per
lane mile.
15.6
10.9
5.9
15.7
17.9
34.2
30.4
36.3
29.5
23.6
30.5 34.7
0
10
20
30
40
50
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
AmountofRHMA,percent
Calendar year
35
25
20
AB 338 Goals
15. Recycled Asphalt Pavement (RAP)
& Recycled Asphalt Shingles (RAS)
Adds recycled asphalt pavement to HMA mix
Pilot projects in 2012/2013.
Caltrans supports RAP because it is:
Cost effective.
Reduces the aggregate use preserving landfill space.
Reduces green house gases emissions.
16. Warm Mix Asphalt (WMA)
Accomplishment: One Million Tons Paved
RHMA-G
OGFC
RHMA-O
DGAC
17. Recycled Concrete Aggregate (RCA)
Used as Base Materials
Development of new and revised standards
Use of available materials
21. Pervious Pavement
Porous Asphalt
Pervious Concrete
Cited in three
Leadership in Energy
and Enviornmental
Design (LEED) credits
under Sustainable
Sites:
5.1
6.1
6.2
22. Smooth Pavement
1. Fuel Efficiency
2. New Construction at IRI 60 or less
3. Use of Inertial Profiler
23. Quiet Pavement
1. Quality of Life
2. Both Asphalt & Concrete Pavements
a. Open Grade Friction Course (OGFC)
b. Grinding
c. New Generation Groove / Grind
24. Focus on Pavement Preservation
Increase efficiency of project selection:
Right pavement strategy at the right time
Age
Pavementcondition
Preservation @ $1
Rehabilitation @ $6
Reconstruction @ $20
25. Optimized Preservation Plan
Preservation Plan
Unattended Pavement
0
75
25
50
100
Rehabilitation
Corrective
Maintenance
Reconstruction
Preventative
Maintenance
Fair
Good/
Excellent
Poor
PavementConditionIndex
Time (Years)
0 302010
27. Worker Safety
• Select the Right Strategy
– Quality Assurance
– Longer Lasting
– Would Not Have
to Come Back to
Repair or Fix It
– Less Worker
Exposure
to Traffic
28. On-System Allocations and Projected Allocations
(Adjusted for Construction Cost Index, in 11-12 dollars)
0
1,000,000
2,000,000
3,000,000
4,000,000
5,000,000
6,000,000
Allocations($1,000s)
Local Bond Other Capacity Increasing SHOPP
SHOPP
Other
Bond
Local
Actual Projected