Dayton Superior and Cold Weather Chemicals

DAYTONSUPERIOR.COM

Cold Weather Chemicals

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ACI 306R-10, “Guide to Cold Weather Concreting.”

“Cold weather exists when the air temperature has

fallen to, or is expected to fall below, 40° F during the

protection period. The protection period is defined as

the time required to prevent concrete from being

affected by exposure to cold weather.”

What is considered “Cold Weather”

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Concrete can resist freeze/thaw if compressive strength

is a minimum of 500 psi

For repeated freezing / thawing, concrete should be a

minimum of 3500 psi

Freeze / Thaw of Fresh Concrete

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Concrete repair work can be accomplished during even the

coldest weather as long as appropriate precautions are taken.

This can be accomplished with enclosures, heating blankets,

hydronic heaters, pre-conditioning the material and heating

the water.

“Cold Weather” Chemicals

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Heaters are one of the cold weather concrete contractor’s

weapons of choice. There are three types of heaters:

• Direct-fired

• Indirect-fired

• Hydronic

Direct-fired heaters are very common but come with a

significant drawback. Combustion byproducts are

discharged with heated air (Carbon dioxide can combine

with repair material and result in a soft chalky surface that

will “dust.” Carbon monoxide is a serious health hazard).


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Hydronic heating systems are popular for winter work,

especially on bridge decks. This technique can be used

without enclosures and can protect much larger areas than

could be reasonably enclosed.


Enclosures are the best

protection but also the most

expensive. Take care to control

the interior environment. Steam

heat is great for repair material

but not workers and can lead to

icing. Dry heat, on the other

hand, can dry out surfaces and

cause crazing cracks

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Chemical Anchoring:

All Weather J51AW;

* 100% solids, high modulus structural epoxy acrylate

* Sets up at temperatures as low as -15°F (-26°C)

* Meets ASTM C-881 Types I,II,IV,V, Grade 3, Classes

A, B and C

* Full cure in 2 hours @ 70°F (21°C)

Dayton Superior products for

Cold Weather

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Curing:

When temperatures are <40°F (5°C), sheet cure

and keep concrete warm enough to meet job demands

unless concrete placement is within an enclosed

temperature controlled area.


Cold Weather

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Cure & Seals

Cure & Seal LV 25% J20UV:

* 25% solids, solvent based acrylic copolymer

* Sprays well in cooler temperatures

* Can be applied @ 35°F (2°C)


Cold Weather

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Evaporation Retardants

AquaFilm Concentrate J74

* Blue fugitive dye for ease of visual inspection

* Mix 1 gallon of J74 to 9 gallons water

* Compatible with cures, sealers, toppings & flooring


Cold Weather

AquaFilm J74RTU

* Yellow fugitive dye for ease

of visual inspection

* Ready to use

* Compatible with cures,

sealers, toppings & flooring

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Form Releases

Clean Strip J1A Winter Grade:

* Compliant in all regions of U.S. with a VOC <250 g/L

* Chemically reactive

* Maintains viscosity in colder temps for improved

sprayability


Cold Weather

Clean Strip J2 Winter Grade:

* Compliant with U.S. EPA with a

VOC <450 g/L

* Chemically reactive

* Maintains viscosity in colder

temps for improved sprayability

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Grouts

Turbo LT 12 Grout:

* 12,000 psi ultimate strength

* Place in plastic or flowable consistency

* Develops 3,000 psi in 2 hours @ 35°F (1.7°C)


Cold Weather

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Concrete Repair

Rapid Resin Repair:

* 100% solids low modulus epoxy/ urethane

* 3-component, resin, hardener and graded aggregate

* Cures in temperatures as low as -20°F (-29°C)

* Open to traffic in 20 minutes

* Full cure in 30 minutes @ 70°F (21°C)

* Full cure in 2 hours @ 15°F (-9.4°C)


Cold Weather

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HD 50:

* Portland cement-based

* Shrinkage compensated

* Fiber reinforced, Polymer modified

* Horizontal or form & pump/pour applications

* 2,000 psi @ 1 Hr. @ 75°F (24°C)

* 3,500 psi @ 3 Hr. @ 75°F (24°C)


Cold Weather

Concrete Repair

* ASTM C-928,Type R-3 mortar,

Very Rapid Setting

* Approved by over two dozen

DOT agencies

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Concrete Repair

Pave Patch 3000:



* Horizontal or form & pump/pour applications

* Approved by many DOT agencies

* 3,000 psi @ 1 Hr. @ 75°F (24°C)

* 4,000 psi @ 3 Hr. @ 75°F (24°C)

* ASTM C-928


Cold Weather

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Concrete Repair

HD 25 VO:


* Shrinkage compensated, polymer modified

* Vertical / overhead repair applications

* 2,400 psi @ 3 Hrs. @ 75°F (24°C)

* 4,100 psi @ 24 Hrs. @ 75°F (24°C)

* 6,200 psi @ 28 days @ 75°F (24°C)


Cold Weather

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Concrete Repair Polyfast FS:


* Shrinkage compensated, polymer modified

* Vertical / overhead repair applications

* 4,100 psi @ 24 Hrs. @ 75°F (24°C)

* 9,000 psi @ 28 days @ 75°F (24°C)


Cold Weather

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Concrete Repair Recrete 5 & 20 Minute:



* Suitable for vertical, horizontal, overhead applications

* Recrete 5 final set @ 12 minutes @ 75°F (24°C)

* Recrete 20 final set @ 35 minutes @ 75°F (24°C)

* Rapid strength gain

* 3,000 psi @ 24 Hrs. @ 75°F (24°C)

* 6,500 psi @ 28 days @ 75°F (24°C)


Cold Weather

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Dayton Superior “Guide To” categories

• Epoxies

• Cures

• Cure & Seals

• Evaporation Retardants

• Form Releases

• Latex Bonders

• Liquid Densifiers

• Sealers

• Water Repellents

• Concrete Repair

• Dry Shake Hardeners

• Polymer Coatings

• Grouts

• Floor Levelers

Prior to most every product category there is a

“Guide To” reference page noting appropriate ASTM / ACI

standards, generic information on surface preparation and

application methods; they also reference the Dayton

Superior products in those categories

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Technical Bulletins are available on:

• Cold Weather Spraying of High Solids Cure & Seals

• All Weather Chemical Anchoring

• Winter Concreting and Repairs

• Cold Weather Use products flyer

Dayton Superior Resources on

Cold Weather Chemicals

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If you have any questions, email us at

[email protected]

Thank you for joining us!

Questions?

mailto:[email protected]

Date post:	30-Jun-2015
Category:	Education
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Dayton Superior and Cold Weather Chemicals

Education