| Date post: | 14-Apr-2017 |
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Government & Nonprofit |
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Warm Mix Asphalt:
The City of Casselberry’s
Experience with WMAKelly H. Brock, Ph.D., P.E., LEED AP, ENV
SPAssistant Public Works Director/City
EngineerCity of Casselberry, FL
APWA Florida Chapter Conference and Exposition - April 20, 2016
City of Casselberry Characteristics
“Crossroads” of SR 436 and US 17-92
Approximately 7.5 square miles
Mostly “built out” suburban/urban environment
Approximately 63 miles of City public roads
Until 2009 lack of a systematic pavement management program
Pavement Management 2009: completed
PASER evaluation
Pavement Management 2009: completed
PASER evaluation 2011: took out
$5.3M construction loan for Neighborhood Improvement Program & applied for TIGER grant
Pavement Management 2013: Developed
mandatory WMA Specification & completed first major road rehab project with WMA (“Area 1-3”)
Pavement Management 2014-15:
Completed 2nd major rehab project with WMA (“Area 4-7”)
2015: Sales tax into effect
2016: Pavement Management Plan formalized in draft Multimodal Transportation Master Plan (includes WMA)
Warm Mix Asphalt 2013-2016: 15
miles /20,708 tons of WMA used
By 2025: 24 miles/33,784 tons of WMA
Projects to date have used WMA Type SP 9.5 Level B (w/ Evotherm)
“Typical” resurfacing thickness of 1.5”
Warm Mix Asphalt Contractor
feedback Pros
Workability (especially winter – highly recommended)
Finer SP 9.5 vs 12.5 produces nicer quality/look (when 1.5” total thickness)
Warm Mix Asphalt Contractor feedback
Cons Can be too
workable in summer (adapt to timing/temperature, especially for curves/radii)
Warm Mix Asphalt Contractor feedback
Prefer Evotherm over water-injected (but Evotherm does require storage and extra cost)
Plant costs about the same in isolated batches (but if everyone used WMA electricity cost would go down)
Warm Mix Asphalt City of
Casselberry observations Quality
surface Reasonable
cost Estimated CO2
savings 9.4 tons/yr 2013-2025
Longevity advantage over HMA: TBD
Questions?
Contact Information
Kelly Brock, Ph.D., P.E., Assistant Public Works Director/City Engineer [email protected] (407) 262 7725 ext 1235 www.casselberry.org/go
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