SMOOTH GUTTER LINES

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Rocky Mountain Asphalt Conference and Equipment
Show February 19, 2009 Best Practices in Using
Slurry Systems Presented by Nathan
Niemann
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ASPHALT
Pavement Preservation Is a must for
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Slurry SystemsMicro-SurfacingSlurry Seal

• Road Selection
• Pre-construction
• Construction
• Post-Construction

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Road Selection

• A bad road covered with a slurry system is just a
  bad road with slurry on it.
• Maintenance on any road boils down to keeping out
  the water.
• Right Road, Right Treatment, Right Time.

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Pre-Construction

• Materials
• Testing
• Mix Design
• Testing
• Stockpiling
• More Testing
• Calibration

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Materials Testing

• Emulsion
• Type of emulsion
• CQS-1HP,CSS-1HP
• CSS-1H, SS-1H
• CQS-1H, QS-1H
• Quality Asphalt
• Formulation
• Mineral Filler
• Lime, Cement
• Aluminum Sulfate

• Aggregate
• Gradation
• Sand Equivalent
• Soundness
• LA Abrasion

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Good Aggregate Source
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Mix Design

• Testing

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Hand mix to verify mix time.
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Soaking 1 hour or 6 day
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Wet track abrasion
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Looking for aggregate loss on wet track
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Wet cohesion tests set time and time to traffic
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Loaded wheel test
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Lateral displacement and sand adhesion
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Schulze-Breuer
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Stockpiling

• Contamination
• Job Mix Formula
• More Testing
• Narrow band Gradations
• Target Gradations

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Tolerances for JMF
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Provide Adequate Area for Staging
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Calibration

• Calibrate Rock
• Calibrate Emulsion

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Calibration
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Calibrate Equipment
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Aggregate Gate
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Aggregate Gate Setting
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Aggregate Belt
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Counters Flow Meters
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Take the Time to Know

• Measure Twice Cut Once.
• You should know the mix will work before you ever
  start.

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Construction

• Road Preparation
• Test piles Sections
• Equipment Maintenance
• Joints
• Hand Work
• What to do if you have a problem
• Documentation

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Road Preparation

• Crack Seal
• HMA Patching
• Weeding
• Paint removal
• Oil spot removal
• Sweeping
• Protect Utilities

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Crack Seal Prior To Maintenance
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Crack Seal
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Asphalt Patching
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Not Acceptable Patching
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Asphalt Preparation
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Remove Weeds
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Remove Paint
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Grind Off Oil Spots
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Sweep Off All Loose Materials
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Dirt And Mud Removal
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Covering Manholes
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Not Acceptable
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Not Acceptable
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Placing

• Test Piles
• Test section

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Equipment

• Daily Cleaning
• Daily Maintenance

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Mixing Chamber Pug Mill
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Slurry Box With Augers
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Joints and Seams

• Square Transverse joints
• Use paper when needed
• Straight Seams
• Gutter Lines

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Clean Gutter Lines
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Longitudinal joints
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Good Seams are not eye-catching
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Unsightly Lines
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Long Straight Lines
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Hand Work

• Make it match
• Dont leave excess material
• Cover your tracks

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Good Seams
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Handwork With Squeegees
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Finishing Ends of Streets
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Good Texture
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What you should to do if you have problems.

• Very Hush-Hush trade Secret
• STOP Working
• Call Suppliers
• Run Tests (Again as needed)
• Identify the problem
• Implement the solution

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Oversize Rock in the Mix
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Drag Marks
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Documentation (What I Track)

• Keep track of where each load of emulsion went
• Keep track of application rates
• Keep track of patching needed
• Know remaining materials on hand
• Quantities under runs and over runs for ordering
  enough materials
• Dont Guess Know

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Screener Weight Bin
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Post-Construction

• If it looks bad it is bad
• Clean up you messes
• Patch areas that need it

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Tire Damage
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Oops
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Questions?

• I prefer easy ones