techcrete and asr repairs
TRANSCRIPT
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Title Here
NCPA 1/19/2016
TechCrete & ASR Repairs
Presented by:
Chris Stebbing
Crafco, Inc.
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What is TechCrete?
TechCrete Composition
TechCrete Attributes
TechCrete Applications
TechCrete Installation
Benefits of TechCrete
Agenda
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Learning Outcomes
At the end of this presentation you should be able to:
• Describe TechCrete and its properties
• Understand the purpose of TechCrete
• Know when and where to use TechCrete
• Recognize the benefits of TechCrete
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What is TechCrete?
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TechCrete is gray in color and aesthetically suitable for all concrete
pavements. It’s used for sealing wide cracks and joints, and repairing a large
variety of pavement distresses in portland cement concrete pavement
(PCCP) and asphalt concrete pavement.
TechCrete is the most advanced
flexible concrete solution for highway
and airport pavement rehabilitation!
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TechCrete Composition
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Binder- Polymer-modified resin.
Polymers and oils are used to better
resist shoving and cracking.
Aggregate – Designed to provide mass and stability for
compression resistance and to meet load bearing
requirements, while still allowing the material to flow.
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Techcrete
Products
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TechCrete Product Comparison
TechCrete-R
TC-R contains smaller aggregate
than TC-TBR and is used in shallow
repairs where neat edge feathering
is required.
TC-R is designed to treat most
distresses up to ¾ in (20 mm) deep.
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TechCrete Product Comparison
TechCrete-TBR
TC-TBR contains larger aggregate
than TC-R and is used in larger and
deeper repairs.
TC-TBR is designed to treat most
distresses from 1 ½ to 8 in (20 to
200 mm) deep.
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TechCrete Product Comparison
TechCrete Fibre Mastic
TC-FM without structural aggregate
contains smaller aggregate similar
to TC-R and is used in shallow
repairs where neat edge feathering
is required.
TC-FM with structural aggregate
contains larger aggregate similar to
TC-TBR and is used in larger and
deeper repairs.
TC-FM is designed to treat most
distresses from ¾ to 8 in (20 to 200
mm) deep.
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TechCrete Attributes
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• Produces no compressive or tensile
stress on the surrounding pavement
• Gray Color
• Flowable/Pourable
• Aggregate Filled/Extendable
• Flexible
• Improves Ride Quality and Safety
• Durable/Resilient
• Waterproof
• Excellent Adhesion
• Rapid Set
• Voidless
• Load Bearing Resistance
• Resistant to Damaging Chemicals
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TechCrete
Applications
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Repair wide cracks
TechCrete Applications
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Repair longitudinal cracks
TechCrete Applications
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D cracking (due to freeze/thaw)
TechCrete Applications
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Joint Failures
TechCrete Applications
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Multi-Corner Slab Repair Corner Breaks
TechCrete Applications
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Spalls & Pop-outs
TechCrete Applications
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Potholes
TechCrete Applications
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Techcrete
Installation
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Installation - Equipment
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Use only an indirectly-
heated melter with sufficient
agitation such as the Crafco
Patcher I, Crafco Patcher II,
or other approved melter.
If appropriate melters are not used,
application difficulties, pump system
damage, and extreme wear can
result!!
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Mark out the perimeter of the areas to be repaired
Installation - Preparation
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Use suitable equipment to mill or remove the defective pavement
Installation - Preparation
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• Only apply TechCrete to clean, sound, dry surfaces.
• Large repair surfaces must be blown clear with
clean, dry, oil-free compressed air.
• Clean and dry the repair area with a hot air lance.
Installation - Preparation
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Installation - Preparation
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If the pavement temperature is less than 40°F (4°C), it can be warmed with a
torch or heat lance. Heating the pavement will also remove moisture, assuring a
dry surface.
Ensure the pavement temperature exceeds
40F (4C) during application.
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• Mask the perimeter of the repair area with fabric
tape to ensure no excess material will be on the
surface of the pavement.
• Prime the entire repair area including side and
bottom surfaces, using a brush or spray applicator.
• Allow the primer to dry to the touch before applying
TechCrete.
Installation - Preparation
Primer must be re-applied if TechCrete is installed
more than 24 hours after priming.
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Installation - Application
The temperature of TechCrete should be between 375°F (190°C) and a
maximum of 400°F (204°C) prior to applying to the pavement
Best practice is use a heat
gun to measure material
temperature.
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Installation - Application
Gravity feed the heated TechCrete directly into the repair area OR pour into a
Crafco TechCrete Bucket and then immediately pour into the repair area.
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Deep repairs need to be installed in multiple
lifts (layers). Each layer should not exceed
2 inches (50 mm) thickness.
Allow TechCrete to cool to 200°F (93°C) or
less, between each lift.
Installation - Application
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TechCrete Installation - Application
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Immediately following application, smooth
product to the desired level using a
straight metal screed or hot iron.
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TechCrete Installation - Application
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Before
After
Allow bubbles to expel from
the applied material.
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TechCrete Installation - Application
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While material is still hot, cover
entire repair area with surface
aggregate.The surfacing aggregate adds
skid resistance, UV protection
and aesthetic value.
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TechCrete Installation - Application
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Pavement is ready for traffic in
1.5 to 3 hours depending upon
repair depth and air
temperatures.
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TechCrete Repair Video
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Techcrete Projects
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TechCrete – West Des Moines, IA
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TechCrete – Ames, IA
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Benefits of Techcrete
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Benefits of TechCrete
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Benefits of TechCrete
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• TechCrete supports heavy loads
• TechCrete improves ride quality
• TechCrete provides a high friction
surface to ensure driver safety
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Benefits of TechCrete
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• TechCrete is easily installed and can be opened to traffic within an
hour
• TechCrete waterproofs PCC pavement and is chemical-resistant
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Questions??
Thank You!