techcrete and asr repairs

Title Here

NCPA 1/19/2016

TechCrete & ASR Repairs

Presented by:

Chris Stebbing

Crafco, Inc.

What is TechCrete?

TechCrete Composition

TechCrete Attributes

TechCrete Applications

TechCrete Installation

Benefits of TechCrete

Agenda

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

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!

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.

Techcrete

Products

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-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 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

TechCrete

Applications

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Repair wide cracks


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Repair longitudinal cracks


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D cracking (due to freeze/thaw)


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Joint Failures


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Multi-Corner Slab Repair Corner Breaks


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Spalls & Pop-outs


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Potholes


Techcrete

Installation

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!!

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


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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.



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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.


Primer must be re-applied if TechCrete is installed

more than 24 hours after priming.

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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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.


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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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Before

After

Allow bubbles to expel from

the applied material.


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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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Pavement is ready for traffic in

1.5 to 3 hours depending upon

repair depth and air

temperatures.

TechCrete Repair Video

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Techcrete Projects

TechCrete – West Des Moines, IA

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TechCrete – Ames, IA

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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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• TechCrete is easily installed and can be opened to traffic within an

hour

• TechCrete waterproofs PCC pavement and is chemical-resistant

Questions??

Thank You!

techcrete and asr repairs

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