BACKGROUND OF TULL• BS in Civil Engineering from Cornell University• Industry Experience:
Concrete Contractor (3 years)
Construction Manager (3 years)
Ready Mix Concrete (17 years)
• ACI Member– 330 Parking Lots– 302 Slab Construction– 332 Residential Concrete– 327 Roller Compacted Concrete– 522 Pervious Concrete
• Registered Professional Engineer in Indiana and Ohio• LEED AP
System of Concrete OverlaysConcrete Overlays
Bonded
Concrete
Overlay of
Concrete
Pavements
Bonded
Concrete
Overlay of
Asphalt
Pavements
Bonded
Concrete
Overlay of
Composite
Pavements
Bonded Overlay System
Unbonded
Concrete
Overlay of
Concrete
Pavements
Unbonded
Concrete
Overlay of
Asphalt
Pavements
Unbonded
Concrete
Overlay of
Composite
Pavements
Unbonded Overlay System
Thinner Thicker
Bond is integral to design Old pavement is base
SCIENCE of BONDED OVERLAY
• Concrete is good compression• Concrete is not as good in tension• Design theory:
– Maximize compression– Minimize tension
• Bond is the key!
The “Duck” Tape Test• This is not rocket science• It is simple• It works…
– If you hear it– It pulls up with a moderate
amount of resistance
ACPA APP Library
• http://apps.acpa.org/applibrary/
http://apps.acpa.org/applibrary/
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