BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow...
Transcript of BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow...
![Page 1: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/1.jpg)
BEST PRACTICES : PAVING AND ROLLING
![Page 2: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/2.jpg)
PAVING PRODUCTS
Understanding the Paver
Keep the paver in good
condition
• Scheduled inspection &
maintenance
• Follow maintenance
guidelines
![Page 3: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/3.jpg)
PAVING PRODUCTS
Understanding the Paver
Basic Paver Functions
• Self-leveling
• Material feed
![Page 4: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/4.jpg)
PAVING PRODUCTS
Understanding the Paver
Tractor Self-Leveling
• Screed is free to rise & fall
• Constant line of pull when
set up properly
• Smooth surface over
irregular grade
![Page 5: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/5.jpg)
PAVING PRODUCTS
Understanding the Paver
Free-Floating Screed
• Screed position determines
mat thickness
• Screed position is constant as
long as all factors remain
constant
![Page 6: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/6.jpg)
PAVING PRODUCTS
Understanding the Paver
Factors Affecting
the Screed
• Paving speed
• Head of material
• Screed adjustments
• Mix design
• Mix temperature
• Air temperature
• Grade temperature
![Page 7: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/7.jpg)
PAVING PRODUCTS
Factors Affecting Screed
Constant Speed
• Shear factor is constant
• Depth remains constant
![Page 8: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/8.jpg)
PAVING PRODUCTS
Factors Affecting Screed
Increased Speed
• Shear factor decreases
• Depth decreases
![Page 9: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/9.jpg)
PAVING PRODUCTS
Factors Affecting Screed
Decreased Speed
• Shear factor increases
• Depth increases
• Amount of depth change varies
with amount of speed change
• Mix design also affects shear
factor
![Page 10: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/10.jpg)
PAVING PRODUCTS
Factors Affecting Screed
Real World Paving
• Do not panic
• Stay with the plan
• Get rid of trucks in an
orderly fashion
• Establish a uniform trucking
pattern
![Page 11: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/11.jpg)
PAVING PRODUCTS
Factors Affecting Screed
Correct Head of Material
• Half auger level
• Constant resistance
• Constant depth
![Page 12: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/12.jpg)
PAVING PRODUCTS
Factors Affecting Screed
Head of Material Decreased
• Resistance decreased
• Depth decreases
![Page 13: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/13.jpg)
PAVING PRODUCTS
Factors Affecting Screed
Head of Material Increased
• Resistance increased
• Depth increases
![Page 14: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/14.jpg)
PAVING PRODUCTS
Factors Affecting Screed
Paving Speed
• Paving speed constant
• Feeder system set to match
paving speed
• Changes in paving speed may
require feeder system
adjustments
![Page 15: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/15.jpg)
PAVING PRODUCTS
Factors Affecting Screed
Adjustable Augers
• Adjustable height augers
help mat texture
• Help prevent segregation
![Page 16: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/16.jpg)
PAVING PRODUCTS
Factors Affecting Screed
• Start at 50 mm (2") above
level of mat prior to
compaction
• Adjust up or down
depending on mix type
and appearance of mat
200mm (8”)
50mm (2”)
50mm (2”) 304mm (12”)
![Page 17: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/17.jpg)
PAVING PRODUCTS
Factors Affecting Screed
Auger Speed
• Auger speed uniform
• 20-40 rpm
• Auger speed too high or
too low can cause stripes
in the mat
![Page 18: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/18.jpg)
CONSISTENCY!!!!CONSISTENCY!!!!CONSISTENCY!!!!CONSISTENCY!!!!CONSISTENCY!!!!
![Page 19: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/19.jpg)
CONSISTENT SPEED!CONSISTENT HEAD OF MATERIAL!
= CONSISTENT RESULTSCONSISTENCY!!!!CONSISTENCY!!!!
![Page 20: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/20.jpg)
![Page 21: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/21.jpg)
Paving by the Numbers
STEP 1
• Heat the screed
✓Electric element
✓Diesel Fired
✓Liquid propane
• Prevents asphalt
sticking to screed
![Page 22: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/22.jpg)
Paving by the Numbers
STEP 2• Adjust Tow Point
Cylinders
✓ Adjust both tow points to “0” then raise the tow point the thickness of the mat to be laid.
✓ Each mark is 20 mm. Example: If the mat being laid is 50 mm (2 in), adjust the tow point to 50 mm (2 in) above “0”
![Page 23: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/23.jpg)
Paving by the Numbers
STEP 3•Set Paving Width
✓Set the extenders width according to job specs
✓Use scales on extenders
✓Equal extender width on both sides whenever possible.
Rear
Mounted
Extensions
Front
Mounted
Extensions
![Page 24: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/24.jpg)
Paving by the Numbers
STEP 4•Set Main Screed
Crown
✓Set screed crown to job specs
✓Scale location changes depending on screed
![Page 25: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/25.jpg)
Paving by the Numbers
STEP 5•Set Extender
Height✓Rear mounted
extenders 6 mm (1/4 in) above zero
✓Front mounted extenders 6 mm (1/4 in) below zero
✓Switch located in each screed control box
Front
Mounted
Extenders
Rear
Mounted
Extenders
![Page 26: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/26.jpg)
Paving by the Numbers
STEP 6•Set the Extender
Slope
✓Set extender slope to job specs
✓Scale location changes depending on screed
Rear
Mounted
Extenders
Front
Mounted
Extenders
![Page 27: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/27.jpg)
Paving by the Numbers
STEP 7•Lower the Screed ✓Lower the screed
onto the starting reference
✓Select a starting reference that is the proper thickness
✓Support main screed and extender screed
✓Reference length 0.9 - 1.2 m (3-4')
![Page 28: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/28.jpg)
Paving by the NumbersSTEP 7• Lower the Screed
✓Move the machine forward to remove the slack from the tow point
![Page 29: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/29.jpg)
Paving by the Numbers
STEP 8•Null The Screed
✓Turn one thickness screw until no resistance is felt
✓Repeat for the other depth crank
✓Check the first side again
✓Null one side at a time
![Page 30: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/30.jpg)
Paving by the Numbers
STEP 8•Null The Screed
✓Turn depth crank in direction of increase until tension is felt
✓Set other depth crank the same way
❖NOTE: Optional thickness screws allow clockwise or counter-clockwise increase
![Page 31: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/31.jpg)
Paving by the Numbers
STEP 9•Position End Gates
✓Lower end gates to contact grade
✓Raise or lower guide tubes to create float space
✓75 mm (3 in) gap between ski and guide tube
75 mm (3 in)
![Page 32: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/32.jpg)
Paving by the Numbers
STEP 10• Set Auger Height
• Auger height affects mat texture
✓Auger height 50 mm (2 in) above mat is right for most mixes
✓Fine tune according to mix
![Page 33: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/33.jpg)
Paving by the Numbers
STEP 11• Position Feeder
Sensors
• Sonic feeder sensors
✓Perpendicular to the live material flow.
✓460 mm (18 in) - 760 mm (30 in) away from the material
✓Target moving material
![Page 34: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/34.jpg)
Paving by the Numbers
STEP 12• Manually Fill Auger
Chamber
✓With the machine at low idle
✓Use conveyor manual override switches on the operator’s console
✓Convey material out until material just touches auger shaft
![Page 35: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/35.jpg)
Paving by the Numbers
STEP 12• Manually Fill Auger
Chamber
✓With the machine at low idle
✓Manually auger material across screed face
✓Auger material out to establish 1/2 level
✓Do not overfill
![Page 36: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/36.jpg)
Paving by the Numbers
STEP 12• Manually Fill Auger
Chamber
✓Using a shovel, hand fill area between last auger and end gate
❖NOTE: Do not fill in area in front of screed extender on rear-mounted extender screeds
No Fill
Area
![Page 37: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/37.jpg)
Paving by the Numbers
STEP 13• Set Feeder Controls
✓Place conveyor switches in Auto (up)
✓Place auger switches in Auto (up)
![Page 38: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/38.jpg)
Paving by the Numbers
STEP 13• Set Feeder Controls
✓Adjust conveyor ratio control dials to 10 o'clock position
![Page 39: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/39.jpg)
Paving by the Numbers
STEP 13• Set Feeder Controls
✓Adjust mix height dials to 10 o'clock position
![Page 40: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/40.jpg)
Paving by the Numbers
STEP 15• Pull Off Starting
Reference
✓Speed control dial at zero
✓PAVE mode, high idle, brakes released, and propel lever full forward.
✓Turn speed dial up until calculated paving speed is reached
![Page 41: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/41.jpg)
Paving by the Numbers
STEP 15• Pull Off Starting
Reference
• As paving begins
✓Operator checks center area of auger chamber.
✓Adjust conveyor ratio controls if necessary to maintain material level at 1/2 auger
![Page 42: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/42.jpg)
Paving by the Numbers
STEP 15• Pull Off Starting
Reference
• As paving stabilizes
✓Check auger speed
✓Keep auger speed in 20-40 RPM range
✓Avoid ON / OFF operation
![Page 43: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/43.jpg)
Paving by the NumbersSTEP 15
• Pull Off Starting Reference
• Screed personnel
✓Check for transition marks
✓Mat should be uniform
No Separation Marks In Mat
(Rear Mounted Extenders)
No Separation Marks In Mat
(Front Mounted Extenders)
![Page 44: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/44.jpg)
Paving by the NumbersSTEP 15
• Pull Off Starting Reference
• Extender too low, mark in line with inner edge of extension
✓Raise extender until transition line disappears
Extender Screeds Too Low
(Rear Mounted Extenders)
Extender Screeds Too Low
(Front Mounted Extenders)
![Page 45: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/45.jpg)
Paving by the NumbersSTEP 15
• Pull Off Starting Reference
• Extender too high, mark in line with outer edge of main screed
✓Lower extender until transition line disappears
Extender Screeds Too High
(Rear Mounted Extenders)
Extender Screeds Too High
(Front Mounted Extenders)
![Page 46: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/46.jpg)
Paving by the Numbers
✓Keep speed constant
✓Speed changes cause bumps or dips
✓Adjust feeder system if speed must be changed.
![Page 47: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/47.jpg)
Paving Products
How Compaction Affects
Smoothness • Transverse Joints
• Patterns
• Stops
![Page 48: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/48.jpg)
Paving Products
Joint Compaction -- Team Effort
• Start with good paving
and minimal hand
work
• Mat depth must allow
for rate of compaction
• Rule of thumb: 1/4” of
compaction for each
1” mat depth
![Page 49: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/49.jpg)
Paving Products
Transverse Joint Compaction
• Whenever possible
roll from the side in
static mode
• Pinches joint
• Rolling straight --drum
tends to bump over
joint
![Page 50: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/50.jpg)
Paving Products
Transverse Joint Compaction
Hot Cold
Joint
12”
#1
![Page 51: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/51.jpg)
Paving Products
Transverse Joint Compaction
Hot Cold
Joint
30”
#1 #2
![Page 52: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/52.jpg)
Paving Products
Hot Cold
Joint
30”
#1 #2
60”
#3
Transverse Joint Compaction
![Page 53: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/53.jpg)
Paving Products
Transverse Joint Compaction
Paver
Hot Cold
Joint
![Page 54: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/54.jpg)
Paving Products
Transverse Joint Compaction
Paver
Hot Cold
Joint
![Page 55: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/55.jpg)
Paving Products
Transverse Joint Compaction
Paver
Hot Cold
Joint
![Page 56: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/56.jpg)
Paving Products
Transverse Joint Compaction
• Straight edge tells
the story
• Too high -- more
rolling may help
• Too low -- hand work
needed to fill in
![Page 57: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/57.jpg)
Paving Products
Bends, Tight Radius Compaction
• Street project paving
12- feet wide
• 66” drum width
breakdown roller
• Operator followed
radius in continuous
pass
![Page 58: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/58.jpg)
Paving Products
Bends, Tight Radius Compaction
• Outside edge of drum
is shoving hot mix
• Mat distortred and
cracked
![Page 59: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/59.jpg)
Paving Products
Bends, Tight Radius Compaction
• Roller operator trained
to roll straight into
radius
• Pattern takes more
passes but leaves
smooth tight mat
![Page 60: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/60.jpg)
Paving Products
Bends or Junctions
Bends, Tight Radius Compaction
![Page 61: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/61.jpg)
Paving Products
Roller Reverse Marks
• 84-inch drum on 12-foot mat yields small reversing angle
• Deep mark left by outside drum edge during turn
• Reversing close to paver on hot, tender mix accentuates mark left by drum edge
• Marks may not clean up during successive passes
![Page 62: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/62.jpg)
Paving Products
Roller Reverse on Adjacent Cold Mat
• Paving westbound lane
breakdown roller could
reverse on cold eastbound
mat
• Less marking on hot mat
• Profilograph showed less
deviation on westbound lane
due to fewer roller marks
![Page 63: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/63.jpg)
Paving Products
Roller Reverse on Shoulder
• 12-foot driving lane and 6-
foot shoulder with 18”
slough
• All compactors stop /
reverse on shoulder
• No stop marks in driving
lanes
• Project earned 100% of
available ride bonus
![Page 64: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/64.jpg)
Paving Products
What We’re Trying to Avoid
• Breakdown roller pattern
• Stops too close together
• Hard to erase completely
with finish rolling
![Page 65: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/65.jpg)
Paving Products
Compactor Stopped during Paver Stop
• Breakdown roller caught up to paver during stop
• Parked on mat 100’ behind paver
• Drums dented mat
Six minute roller
stop
![Page 66: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/66.jpg)
Paving Products
Thermal Effect of Roller Stop
• Drums act as heat sink on mat
• Two cold dents created
• P2 and P3 150o F
• Dents will not be removed by next roller passes
![Page 67: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/67.jpg)
Paving Products
Effect of Roller Stop on Smoothness
• Dents left by drums are easily identified -- two sets of bumps and dips about 8 feet apart
• 0.18 added to score in 8 feet of paving
• Proves that finish roller could not clean up these marks
![Page 68: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/68.jpg)
Paving Products
Stopping for Water
• Always try to find a place
to park off the driving lane
• Shoulders, turn-outs,
driveways
![Page 69: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/69.jpg)
Paving Products
Breakdown Roller Stopped for Water
• Compactor stopped 10
minutes on mat for water
• Mat cooled to 150 o F under
the drums
• Drums created depression
and bump
• Sometimes this is
unavoidable -- right?
![Page 70: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/70.jpg)
Paving Products
Thermal Image of Roller Stop
• Drums act as heat sink
• Rapid loss of heat in
mat under drums
• Intermediate and finish
passes will not remove
bumps
Label Emissivity Background
Average
P1 0.94 84.94 124.36
P2 0.94 84.94 151.37
P3 0.94 84.94 162.85
P4 0.94 84.94 152.44
![Page 71: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/71.jpg)
Paving Products
Intersection Tie-ins
• Note: small roller
working on tie-in to
intersection
![Page 72: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/72.jpg)
Paving Products
Rolling onto Mainline Mat
• Intersection roller
stopped/reversed
on hot mainline mat
• Operator given
instructions to roll
parallel to joint
![Page 73: BEST PRACTICES : PAVING AND ROLLING · 09/03/2019 · Paving by the Numbers STEP 2 •Adjust Tow Point Cylinders Adjust both tow points to “0” then raise the tow point the thickness](https://reader036.fdocuments.net/reader036/viewer/2022090507/601caddb74dbef61c565e0f6/html5/thumbnails/73.jpg)
Paving Products
How Compaction Affects
Smoothness • Plan your work to match
the application
• Ask questions if you’re not
sure
• Stop rolling when you see
a problem
• Consult the supervisor or
QC person