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Cold In Place Recycling Rocky Mountain Asphalt Conference
February 24th, 2017Crowne Plaza Hotel, Denver Colorado
Ron Matteson785-577-6990
Midwest Area Sales Manager, Coughlin Company Inc. St. George, Utah / Salina, Kansas
RM1
Slide 1
RM1 Ronald Matteson, 2/18/2017
Asphalt Recycling Options
CIR = Cold in Place RecyclingMulti Unit or Single Unit
CCPR = Cold Central Plant Recycling
Where?
City Streets
Iowa
Colorado
Interstate Highways
Rural Roads
California
Candidates For CIR • BLOCK CRACKING• ALLIGATOR CRACKING• THERMAL CRACKING (LINEAR CRACKING)
• DETERIORATING ASPHALT SECTION
• STRIPPED ASPHALT• PATCHED ASPHALT• POTHOLES (WITH STABLE BASE SECTION)
What is the pavement distress?
What is the pavement distress?
What is the pavement distress?
What is the pavement distress?
What is the pavement distress?
Selecting the Right project for CIR
• Through proper project selection the CIR process should be applied at the right time to the right project. Good specifications and an engineered approach are equally important.
• Design Criteria to consider1. Design Life2. Funding Availability3. Conservation of Natural resources and Energy4. Environmental Factors5. Geometric Design and Construction Considerations6. Traffic Control7. Project Selection/Investigation8. Life‐cycle Cost Analysis9. Construction Practices
• Project Selection / Investigation are Crucial to project success
• Cold In-Place recycling can treat most common pavement distresses depending upon the depth of treatment
Distress TypeExtent of Problem
Minor MajorFatigue Cracking
Linear or Block crackingRutting
RavelingBleeding
RoughnessSkid Loss
Moisture Damage
Cold In-Place Recycling Allowable Pavement Condition
Effective Marginal Not AppropriateNo Impact
Multi-Unit Recycling Train• A multi‐unit recycling train is made up of a asphalt milling machine which pulls the recycler that is equipped with a vibratory screen, crusher and pugmill
• The material is sized, weighed and blended with emulsion along with additives such as lime or cement to meet mix design specifications
• The multi‐unit train can be used on long straight roads, along with mountain passes such Lake City, Colorado (Hwy 149, const. 2016), Mt Evans (Hwy 103, const. 2014)
• The typical depth of recycling for this method is 2” – 5” inches
Multi-Unit Recycling Train
CIR Construction ProcessMilling
Vibratory Screen/Crusher
Pugmill
Emulsion Tanker
CIR Windrow
Paver
Pick up Machine
Additive Tankers
CIR Mat Before Compaction
Multi-Unit Recycling Train
Single-Unit Recycling Train• A single unit recycling train is very friendly and adaptive for city applications due to its size
• Just like the full train, with the single unit the material is blended with emulsion, along with additives such as lime or cement that are anti‐stripping agents, also helps with curing and builds added strength
• The single unit recycler is more economical for smaller jobs due to reduced mobilization costs
• Good option for roadways that won’t facilitate the multi‐unit train
• The typical depth of recycling for this method is 2” – 5” inches
Single-Unit Recycling Train
Single-Unit Recycling Train
Single-Unit Recycling Train
Cost Saving Considerations• With 100% of the material in the roadway being recycled it eliminates trucks to haul millings away and bring new asphalt back to the project
• Aggregate mining equipment fuel consumption is reduced significantly
• Similar to what you would have on a mill and fill operation minusthe construction truck traffic which is significantly reduced
• Traffic can usually be turned back on the roadway within a few hours after the process is complete, or at the end of the day
Traffic Control
• Materials for CIR (like any other rehabilitation technique) should be considered for the given environmental conditions such as rain, snow, or freeze thaw climate.
• CIR has to be topped with some type of surface treatment
Cold Central Plant Recycling
• Cold Central Plant Recycling (CCPR) is a process where the asphalt recycling occurs in a central location
• Asphalt emulsion is added, and the CCPR mix can be used immediately for paving or stockpiled for later use for maintenance blade patching or pot hole repair
• CCPR is set up in a central location where several possible projects or applications could take place
• RAP (reclaimed asphalt pavement) is a valuable asset that can be given new life and then used to pave roads and parking lots using conventional paving equipment
• This process is used when the job requires a deeper section of asphalt to be recycled, you have access to asphalt millings or are in areas that are inaccessible to the multi‐unit train
The Recycled Asphalt Solution Stockpiled RAP is:
Sized Mixed with emulsion Hauled to jobsite for immediate laydown or stockpiled for later use
Placed by paver or blade Compacted Covered with surface treatment Typically after 2‐7 days Fog seal, chip seal, overlay, etc.
Cold Central Plant Recycling (CCPR)
Central Plant Recycling Operation
Cold Central Plant Recycling (CCPR)
Advantages• A lower cost paving material• Consistent, predictable
• Engineered performance
• Restores RAP value with minimal cost to user & agency• Environmentally friendly
Reliable!
• CIR provides between 10 to 15 years or more of service life depending upon the amount and type of traffic
• CIR significantly reduces reflective cracking • CIR usually costs about 20-30% less than alternative
methods or more while providing similar structural strength
CIR offers the ideal sustainable strategy since it utilizes 100% of the existing materials
Conservation of Natural Resources
Thank you
Questions??Ron Matteson785-577-6990
Area Sales Manager, Coughlin Company Inc. St. George, Utah / Salina, Kansas
Actual Agency Experience
WyDOT – Ryan Steinbrenner
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