2014 WMA presentation Dec 10 San Diego
-
Upload
california-asphalt-pavement-association -
Category
Engineering
-
view
224 -
download
0
Transcript of 2014 WMA presentation Dec 10 San Diego
![Page 1: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/1.jpg)
WMA&
Local AgenciesBrandon Milar, P.E.
Technical Marketing Manager
![Page 2: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/2.jpg)
2WMA for Local Agencies; CalAPA SDTC
Summary
1. What is Warm Mix Asphalt (WMA)?
2. Why are we shifting to WMA?
3. How do we make WMA?
4. How does an Agency specify WMA?
5. WMA Field Observations
![Page 3: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/3.jpg)
3WMA for Local Agencies; CalAPA SDTC
What is WMA
![Page 4: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/4.jpg)
4WMA for Local Agencies; CalAPA SDTC
What is Warm Mix?
Asphalt mix that includes a technology which improves the production and placement of conventional asphalt mix at significantly lower temperatures.
![Page 5: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/5.jpg)
5WMA for Local Agencies; CalAPA SDTC
Components of Value
Energy Savings
Lower emissions
Reduced worker fatigue
Increased production efficiency
Decreased plant wear
Improved RAP Integration
Longer hauls
Reduced thermal segregation
Cool weather paving
Improved compaction
Improved smoothness
What applies to YOU?
![Page 6: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/6.jpg)
6WMA for Local Agencies; CalAPA SDTC
Why are we shifting to WMA
![Page 7: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/7.jpg)
7WMA for Local Agencies; CalAPA SDTC
Increased environmental activism has led to:
• Lowering of emission limits
• Reducing exposure to harmful chemicals
• Increasing complaints
• Reducing new HMA plant permits
A “Greener” Planet
![Page 8: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/8.jpg)
8WMA for Local Agencies; CalAPA SDTC
Identify and Deploy Innovation that:
• Shortens Project Delivery
• Enhances Roadway Safety
• Protects the Environment
WMA identified as an effective, proven, and market ready technology that the FHWA is prioritizing for accelerated use
FHWA: Every Day Counts
![Page 9: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/9.jpg)
9WMA for Local Agencies; CalAPA SDTC
Improvements in mix performance • Increase use of modified
binders
• Increase use of coarse mixes
• Required density
Changes in lane closure requirements• Night Paving
• Take a chance in cool temps
PERFORMANCE!!!
![Page 10: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/10.jpg)
10WMA for Local Agencies; CalAPA SDTC
Constructability
Utilizes exiting asphalt paving equipment and methods
Improves workability with high recycle content mixes
WMA helps produce and/or place asphalt mix at lower temperatures:
Reducing RISK!!!
![Page 11: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/11.jpg)
11WMA for Local Agencies; CalAPA SDTC
How do we produce WMA
![Page 12: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/12.jpg)
12WMA for Local Agencies; CalAPA SDTC
WMA Technologies
![Page 13: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/13.jpg)
13WMA for Local Agencies; CalAPA SDTC
Use the same process/equipment as HMA
• Design:
• Utilize WMA technology in design
• Production:
• Dry the Rock!!!
• Placement:
• Treat as NEW mix
• Correlate density measuring devices
• Establish roller pattern and temperature ranges
BMPs
![Page 14: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/14.jpg)
14WMA for Local Agencies; CalAPA SDTC
How does an Agency Specify WMA?
![Page 15: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/15.jpg)
15WMA for Local Agencies; CalAPA SDTC
Which technology for me?
• Who chooses the technologies?
• Approved?
– Permissive approach
– QPL list
– “National” Qualification
How does WMA fit into existing HMA mix design approval?
Testing Protocol?
Temperature Requirements?
Specifications
![Page 16: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/16.jpg)
1616
Temperature Considerations
• Mix Design
• Mixing, Conditioning, &
Compaction
• Ambient
• Production
• Windrow
• Laydown
• Screed
• Breakdown
• Intermediate
• Finish
WMA for Local Agencies; CalAPA SDTC
![Page 17: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/17.jpg)
1717
Local Agency WMA Use
Portland, OR: WMA required on all Capital Improvement Projects.
Fort Worth, TX & San Antonio, TX: When WMA specified, placement temperature behind the screed must be 235°F or less.
New York City, NY: Use WMA at all City owned hot plants. Use with 40% RAP mixes at low temps (below 32F).
Mexico City, Mexico: Use WMA at all city hot plants to reduce emissions.
New Mexico DOT: All asphalt paving required to be WMA (production below 275F).
WMA for Local Agencies; CalAPA SDTC
![Page 18: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/18.jpg)
18
WMA Field Observations
WMA for Local Agencies; CalAPA SDTC
![Page 19: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/19.jpg)
19
WMA Production Temperature Range
250ºF
200ºF
350ºF
Conventional H
ot
Mix
300ºF
Wax a
nd C
hem
ical A
dditiv
es
Foam
ed A
sphalt
Every 10°degrees increase of temperature
doubles exposure to asphalt fumes – BP
0
0.4
0.8
1.2
1.6
2
mg
/cu
bic
mete
r
Total
Organics
Benzene
Solubles
Hot Mix
Warm Mix
WMA for Local Agencies; CalAPA SDTC
![Page 20: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/20.jpg)
20
62 Deg Difference
WMA for Local Agencies; CalAPA SDTC
![Page 21: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/21.jpg)
21
24 Deg Difference
WMA for Local Agencies; CalAPA SDTC
![Page 22: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/22.jpg)
22WMA for Local Agencies; CalAPA SDTC
![Page 23: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/23.jpg)
23WMA for Local Agencies; CalAPA SDTC
![Page 24: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/24.jpg)
24WMA for Local Agencies; CalAPA SDTC
![Page 25: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/25.jpg)
25WMA for Local Agencies; CalAPA SDTC
Cold Weather Paving
New York City,
8 Dec. 08,
40% RAP PG 64-22
Paving
![Page 26: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/26.jpg)
26
Chicago - Increased Recycled Content
Using high amounts of RAP & RAS even in cold temperatures like 25oF.
Reduced equipment wear and tear by lowering the production temperature to 325oF from 365oF (winter production temps).
Better workability with RAP & RAS.
PG 58-22
37% RAP and 5% RAS
WMA for Local Agencies; CalAPA SDTC
![Page 27: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/27.jpg)
27
Binder Hardening
WMA for Local Agencies; CalAPA SDTC
![Page 28: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/28.jpg)
28
Century Asphalt – No Vibrations
Logistical nightmare
• Bridge deck of I-35 in downtown San Antonio, TX
• Milling, then chipseal, then overlay
• All night paving
• Plenty of freeway intersections and ramps
• Type D mix with PG64-22, 16% RAP, 4%RAS
• No vibratory rollers allowed on bridges
• Long truck wait times!
WMA
• 70F drop in production temperature
• Excellent workability even with truck delays
• Rollers ran right behind the screed
• 93.5-94 Densities
WMA for Local Agencies; CalAPA SDTC
![Page 29: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/29.jpg)
WMA Addressing Asphalt Rubber Paving challenges
• Smoke
• Odors
• Compaction
• Temperature
• “Swell”
How to Successfully Marry WMA & GTR, May 16, 2013
![Page 30: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/30.jpg)
30How to Successfully Marry WMA & GTR, May 16, 2013
2600 tons ¾” RHMA-G
0.2’ lift
Ambient = ~60F
Test section in a larger project
Evaluating temperature of mat and compaction
![Page 31: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/31.jpg)
Pounding the Pavement
MIX PROD
(F)
SCREED
(F)
BREAK
(F)
INTER
(F)
FINISH
(F)
CONV 275 250 280 185 155
WMA 250 230 220 170 135
How to Successfully Marry WMA & GTR, May 16, 2013
Surpassed 91% min
Same rolling pattern for both conventional and WMA.
Temperature
![Page 32: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/32.jpg)
32How to Successfully Marry WMA & GTR, May 16, 2013
Lowered Production Temps:
• 275F, 250F, 240F, 230F
Higher Production Rate
• Conv: 295tph@ 275F
• WMA: 375tph @ 250F
250F preferred with this mix
![Page 33: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/33.jpg)
33How to Successfully Marry WMA & GTR, May 16, 2013
![Page 34: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/34.jpg)
34How to Successfully Marry WMA & GTR, May 16, 2013
18,000 tons ½” ARHM (Greenbook)
2” lift
Ambient (day) = ~80F
Ambient (night) = ~55F
Long Haul:
1 hour - Newhall
2 ½ hour - Gorman (4000’ el)
Night Paving - Newhall
County’s 1st WMA ARHM Project
![Page 35: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/35.jpg)
Density Achieved
MIX PROD SCREED BREAK INTER FINISH
CONV 325 290 280 250 200
WMA 290 250 240 190 135
MIX Avg (%) BREAK INTER FINISH
CONV 93.2 4V 4V 2V
WMA 94.1 2V 4V 2S
How to Successfully Marry WMA & GTR, May 16, 2013
Rolling Pattern
Temperature
![Page 36: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/36.jpg)
36
Smoothness of Thin Lifts and Crack Seal
WMA for Local Agencies; CalAPA SDTC
![Page 37: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/37.jpg)
37
Hall Street, St Louis MO - Side by Side
WMA for Local Agencies; CalAPA SDTC
![Page 38: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/38.jpg)
38
Hall Street, St Louis MO - 5 ½ Years Later
WMA for Local Agencies; CalAPA SDTC
![Page 39: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/39.jpg)
39WMA for Local Agencies; CalAPA SDTC
The Value of WMA
Relative
Production
Temperature
Asphalt
Construction
Process
WMA
Value
WMA
Expectation
HMA Total Project Extended Paving Season
Production Improved Aggregate Coating
- 25°F Reduced Fuel Usage
Reduced Emissions
-50°F Increased Recycle Content
Transport Increased Haul Distance
-75°F Laydown Improved Compaction
Reduced Emissions
Improved Worker Comfort
![Page 40: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/40.jpg)
40WMA for Local Agencies; CalAPA SDTC
Example #1: WMA @ Reduced Prod Temps (-50F)
Relative
Production
Temperature
Asphalt
Construction
Process
WMA
Value
WMA
Expectation
HMA Total Project Extended Paving Season Maybe
Production Improved Aggregate Coating Yes
- 25°F Reduced Fuel Usage Yes
Reduced Emissions Yes
-50°F Increased Recycle Content Yes
Transport Increased Haul Distance Maybe
-75°F Laydown Improved Compaction Yes
Reduced Emissions Yes
Improved Worker Comfort Yes
![Page 41: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/41.jpg)
41WMA for Local Agencies; CalAPA SDTC
Example #2: WMA @ HMA Production Temps
Relative
Production
Temperature
Asphalt
Construction
Process
WMA
Value
WMA
Expectation
HMA Total Project Extended Paving Season Yes
Production Improved Aggregate Coating Yes
- 25°F Reduced Fuel Usage No
Reduced Emissions No
-50°F Increased Recycle Content No
Transport Increased Haul Distance Yes
-75°F Laydown Improved Compaction Yes
Reduced Emissions No
Improved Worker Comfort No
![Page 42: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/42.jpg)
42WMA for Local Agencies; CalAPA SDTC
Conclusions
The future of asphalt paving is available TODAY!!!
WMA technologies perform at varying levels and need to be understood by the Contractors
WMA reduces risks in asphalt paving
![Page 43: 2014 WMA presentation Dec 10 San Diego](https://reader033.fdocuments.us/reader033/viewer/2022052400/55a6a3611a28ab86148b4569/html5/thumbnails/43.jpg)
43WMA for Local Agencies; CalAPA SDTC
Thank you!
Brandon Milar, P.E.
Technical Marketing Manager – Evotherm
925.852.8668