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A Brief History of Thyme as per Minnesota PCC Pavers
Co-Written by Steve Hawlking, A2Zand
Bob McPartlin, PE
Concrete Paving Ass’n of Minnesota Workshop – March 14, 2019
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The Concrete Paver:
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Disclaimers . . . . .
• Interviewed several personnel from various companies• No intention to rate productivity, quantity or quality of the different
companies• Balanced approach• Other
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Olden Times – it worked for them!
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Time
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Old TH 61, south of Red Wing – mid 1920s
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Time
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How Thick Can Concrete be Placed?
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Time
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Peru – Pan-American Highway
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Time
Usef
ul Li
fe o
f Pav
emen
t
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Who Begets Whom?
Family Tree Approach
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Who Begets Whom?
Family Tree Approach
Francis – Catherine; George – Ella; Augustus – Laura; Andrew – AnnaFrancis – Alice Robert – Rose
Hugh – RosemaryRobert
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Who Begets Whom - Part II
Spaghetti Western Approach
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Who Begets Whom - Part II
Spaghetti Western Approach
ClintLeeEli
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Who Begets Whom - Part III
The “Bonanza” Approach
Ben
Adam Hoss Little Joe
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SomeSSomeday Son, this will be all yours!
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Who Begets Whom - Part IV
• Family lineage• Got tired, dropped out
• New company picked up pieces• Employees felt a better way - - - left• Void in the Industry (real or perceived), and filled
• As always - - A Chance to Make Money
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The Early Years
• Progressive Project Types• Basements• Sidewalk and Flatwork• Curb / Gutter and Median
• Slipform• Mainline
• Both Feet at One Time• Mainline
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Innovation over the Years
• Subgrade preparation• Fine-grade motor grader - - back / forth with many “Blue Tops”• Automated Trimmer – 3000’ to 2 miles per day
• Form• Several crews of xx plus trucks – Set AND tear down
• 10’ . . . 245#• Inventory – 8”, 9”, 10” – etc (Design of PCC = Engineered or Forms available?)• Slip Form
• One-side stringline – controlled trimmer only for vertical• Two-side string – for trimmer and paver, etc
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Innovation over the Years
• Concrete Production• Ready-Mix (Urban, small projects)• On-job Mixers
• Rex 7E; 11E; 27E; 34E - - and others• Cubic Feet - - 7, 11, 29.7, 37.4
• Double Drum central plant• 2-minute cycle (34E) to 70-seconds
• 375 % increase in production• Evolved into “Very Mobile” set-up / tear down
• Concrete Transportation• 6-CY trucks - - > 9-CY
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27–E Concrete Paver
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Innovation = Production
• ACPA Mantra of the Time = Mile-a-Day!• Woodrich Const. - - 1963 I-90 Austin to Stewartville
• Better paver “smoothness” = less fatigue on straightedge & floaters• Just-in-Time Trucking
• Material Supply• Wet-Mix Delivery• Radio - - Cell Phone - - Weather Forecasting Apps
• Labor - - due to the above …… 100s to dozens
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Just in Time - - Downtown Berlin, World Cup
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Innovation - Concrete
• W/C ratio - - lower• Better aggregate blending• Better curing material• Better AE admixture (and testing)• Water-reducing Admixtures!• More Cementious blends – Fly Ash; Slag• Better designed joint pattern
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Timeline of Events
• 1900s - - 1910s - - - 1920s - - -• The auto, and travel - - - soon the need for ‘cross-country’ network• Private “Auto Clubs”; “Named Routes”• 1919 : X-C trip by DDE
• Federal question - -• A National System of Highways or • System of National Highways? • The Big Roads by Earl Swift
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Timeline of Events
• 1930s• Economic Depression• Federal $$ for Roads as “Make Work”
• Consequences? • WWII – An interruption in road building, or ‘re-tooling’?
• Al-Can Highway• New dozers, trucks, laydown equipment• Personnel trained by SeaBees, Corps of Engineers, etc.
• Interstate Funding, other Federal $$; and explosion of projects
• The rest is History
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Butch Cassidy / Sundance Kid ----“Who are those Guys”
• The Early Pavers:
• The beginnings of the Growth – the 50s and 60s:
• Today’s Minnesota Concrete Pavers:
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Early Pavers
Hallet ConstCentral StatesMcCree & Co.Ashbach Const
Woodrich ConstArcon Const
Oakes ConstPalda & SonsE.W. Coons
Anderson & SonsNorthern Improvement Co
Doyle Conner
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Minimal Equipment - - Fakarava, South Seas
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Time
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Beginnings of the Growth – 50s & 60s
Anderson & SonsArcon Const. Co.
Ashbach Const. Co.Barton Contracting Co.
Central States Const. Co.E.W. Coons
Doyle ConnerGould Const. Co.
Plus – Associates, Material Suppliers,
S.J. Groves and SonHallett Const. Co.McCree and Co.
Megarry Bros. Const. Co.Palda and Sons, Inc.
Schultz & Lindsey, Inc.Woodrich Const. Co.
Cement producers, etc
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Parameters for FIRST Paving Awards
February 28, 1961 – CPAM Board of Director’s Meeting
Smoothness was primary consideration
“Set the Roughometer Index “Low enough” so it will be hard to obtain a full score.”
Reduce 1 point for every inch over 60 “/mile
(Today’s Readings = ??)
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Also of Note . . . .
April 21, 1961 – CPAM Board of Director’s Meeting
Hire a ConsultantStudy Maintenance Costs of Concrete and Asphalt pavements as far
back as 1947 or 1948 for comparison and advertising purposes.
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Today’s Minnesota PaversC. S. McCrossan
Doyle ConnerHoffman Concrete
North Country ConcretePCi, Roads
S.M. Hentges & SonsShafer Contracting
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Today’s Paving Train
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CPAM Executive Directors
Al O. TorgersonL.P. Pederson
Phillip HennesseyDick VanKrevelen
Arnie LaingenDan FrentressMark SnyderMatt Zeller
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Innovation is not restricted
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I-17, Phoenix, AZ – innovative delivery
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Time
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Stre
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Innovations by Contracting Agencies
Maximum Inspection Forces
And the Minimum
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The Future of PCC Paving?
• # of Projects; $$ of Projects = # of Pavers• Concrete to be tweaked - - - - “Good for the Romans”• Productivity to increase
• Better equipment - - (drones?)• Innovation• Return to the 34-E? (ie. Mix at the Job Site?)• Precast? Pre-stressed or Post-tensioned?
• Labor to get smarter• Stingless Paving• Doing More with Less
• Getting the Edge
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Time
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Your Questions?And
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