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Concrete 101

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A presentation given during the 39th Annual NCPA Concrete Paving Workshop. By Richard Tremain, Product Manager, Husqvarna Construction Products

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Concrete 101

  1. 1. Concrete 101 Concrete Pavement Sawing
  2. 2. Presenter Richard Tremain: Product Manager Husqvarna Construction Products 03/13/18Footer: Document subject 2
  3. 3. Agenda • Types of concrete saws • Diamond blades • Types of material • Conventional sawing • Soff Cut sawing
  4. 4. Concrete Saw Types • Referred to as: • Concrete Saw • Road Saw • Walk Behind saw • Flat Saw • Push Saw • Self Propelled Saw • Soff Cut Saw
  5. 5. Saw Type – Small Conventional Horsepower 8.5 HP 11 HP 20.8 HP 27HP 35 HP FS 309 – 14" FS 400 – 18" FS 413 – 18" FS 513 – 18" FS 520 – 20" FS 524 – 24" FS 627 – 20" FS 3500 – 30" 35 Horsepower and below Push or self propelled
  6. 6. 03/13/18 6 Saw Type - Large Conventional Horsepower 35 HP 48 HP 74 HP 85 HP FS 5000 – 36” FS 4600 – 30” FS 7000 – 42” 35 HP and above Self propelled RS 8500 – 20”FS 3500 – 30"
  7. 7. Saw Type – Soff Cut Horsepower 2.3 HP 4.3 HP 9 HP 11 HP 20 HP 22 HP 25 HP SC 150 SC 2000 SC 2500 SC 4000 SC 4200 SC 5000SC 390 7/8” – 1-1/8” 1/2” – 1-1/2” 7/8” – 1-1/2” 7/8” – 1-1/2” 1-1/8” – 2-3/4” 1-1/8” – 3” 2” – 4” Cutting Depth
  8. 8. Types of Diamond Blades • Softer bonds for harder materials – Also needed for harder aggregates • Harder bonds for softer materials – Also needed for softer aggregates – May have undercut protection • Must be matched to machine power • General purpose blades • Thickness from 0.095” to 0.500” • Diameters from 7” to 72”
  9. 9. Diamond Blade Identification Industry/Association Designation Manufacture serial number, part number, and description Undercut protection Vertical insert Could also be a slanted segment or deeper segment.
  10. 10. Soff Cut Blades Soff Cut blades include a skid plate Recommend changing skid plate with every blade Skid plate holds surface material in place while cutting Soff Cut blades are color coded and numbered 6000 1000
  11. 11. Types of material
  12. 12. Types of material • Green Concrete – Considered a softer material, abrasive – Concrete that has set but not fully cured – Under twenty four hours – Cutting dependent on aggregate hardness • Asphalt – Considered a soft material, abrasive • Cured Concrete – Considered a hard material, not abrasive – Over twenty four hours old – Hardness mostly dependent on aggregate
  13. 13. Timing of Cuts • Green/joint sawing must be timed to the setting of the concrete. • It should be started as soon as the concrete has hardened sufficiently to prevent aggregates from being dislodged from the surface by the cutting process. • Before drying/shrinkage stresses become large enough to produce cracking.
  14. 14. Variables • Variables that effect when to cut and how long the window to cut • Temperature • Humidity • Wind • Additives
  15. 15. Soff Cut Method • Start cutting two to four hours after finishing • Can be cut dry • Recommend dust collection system • Usually two to two and half hour window after first cut
  16. 16. • 15’ to 18’ per minute cutting speed • 20,000 to 22,800 ft2 area • 24’ x 950’ – a little less than a ¼ mile of two lane pavement • Dependent on joint spacing Soff Cut Method
  17. 17. Conventional Cutting Method • Start cutting four to eight hours • Usually a 2-1/2 hour to 4 hour window after first cut • 18’ to 24’ cutting speed • 42,000 to 45,000 ft2 • 24’ x 1,980’ – about 3/8 mile of two lane pavement • Dependent on joint spacing
  18. 18. www.husqvarnacp.com 03/13/18Footer: Document subject 18

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