cures , sealers technology concrete protection · pdf file–retains water in the concrete...
TRANSCRIPT
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Cures , Sealers
Densifiers & Crystal
Technology
Ultimate / Proven
Concrete Protection
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IF USED
CORRECTELY AND
IN THE RIGHT
PLACES
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What is a Curing Membrane?
• Aids in the development of the designed strength– Retains water in the concrete to promote proper
cement hydration
• Helps minimize unwanted cracking – Surface Cracking
– Shrinkage Cracking
• Minimizes discoloration – Minimize water carrying impurities to the surface
• Provides a barrier to minimize early stages of carbonation – Reduces or Eliminates Carbon dioxide infiltration
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What is a Acrylic Sealer?
• Protects against contamination
– Film forming layer on surface
• Protect against abrasion
– Protection layer on the surface
• Protect against chemical attack
– Chemical resistant resins
• Visually enhances the substrate
– Reflects light
• Increase slip resistance
– With slip resistant additives
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Water-borne Cures
and Sealers
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Water-borne Cures and Sealers
• Water, solvent and solids
(acrylic, urethane, epoxy)
– Solvent = 1%-10% of the total weight
• High level of surface tension
– More difficult to penetrate tight surfaces
• Temperature and moisture sensitive
– Ambient, material and surface
• Multiple thin applications required
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How do they work?
Water
Co-Solvent Acrylic
Main Components
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Water-Borne Materials
Evaporation
Slow Evaporation
Water Co-Solvent Acrylic
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Water-Borne Materials
Evaporation
Co-Solvent amount becomes greater than the Water and starts to
dissolve the Acrylic
Water Co-Solvent Acrylic
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Water-Borne Materials
Evaporation
The Co-Solvent dissolves the Acrylic to produce an emulsion (liquid)
Water Co-Solvent Acrylic Emulsion
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Water-Borne Materials
Water Evaporation
CONCRETE
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Water-Borne Materials
Co-Solvent Evaporation
CONCRETE
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Water-Borne Sealers
All of the Co-Solvent has evaporated
and a film has been developed
CONCRETE
Acrylic Film
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Solvent-borne Cures
and Sealers
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What are VOC’s?
• A. Volatile Organic Compound (VOC)
– a. Used to dissolve the acrylic/urethane
– b. Laws do not only relate to manufacturers
but Specifiers and Contractors are held
accountable if caught using non-approved
products
• Measured in grams per liter
• Density of the Solids compared to the
density of the solvent
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Volatile Organic Content
• California
– 2005 VOC limit 250 grams/liter
– Current VOC limit 100 grams/liter
• Not all solvents are equal
• Most equate VOC level to solvent-borne
only. Water-borne sealers have a
measurable solvent content.
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Volatile Organic Content• Exempt Solvents
– Acetone
• Flash point -1 F
– Oxsol 100
• Flash Pint 109°F
– Tertiary Butyl Acetate
• Flash point of 40 F
• Not approved (non-exempt) in CA but can be used
on the East Coast (New England States, PA, OH)
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Solvent-borne Cures and Sealers
• Solvent and solids
(acrylic, epoxy or urethane)
– Solvent – 40% - 75% of weight
• Lower level of surface tension
– Easier to penetrate a tight surface
• Less temperature and moisture
sensitive
– Ambient, material and surface
• Multiple thin applications for best
performance
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Solvent-Borne Materials
Main Components
Solvent Acrylic
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Solvent-Borne Materials
The solvent dissolves the Acrylic
Solvent Acrylic
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Solvent-Borne Materials
Solvent Acrylic/Solvent Emulsion
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Solvent-Borne Materials
Solvent Evaporation
CONCRETE
Acrylic Emulsion
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Solvent-Borne Materials
All of the Solvent has evaporated
and a film has developed
CONCRETE
Acrylic Film
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Clear Acrylic Sealers
• Are Both Water and Solvent-borne
• Offers a level of protection
• Enhances color
– Water-borne provides a more natural appearance
– Solvent-borne provides a deeper color reflection
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Where to Use
• Cure and Seal
• Integral Color and conventional concrete
• Imprinted, broom, swirl, and float finish
• Streetscapes, driveways, sidewalks and
interior floors
• Interior floors must be maintained
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Liquid Chemical
Concrete Hardeners
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Liquid Chemical Hardeners
• Reacts with chemicals in the concrete
• Develops a crystalline gel that fills the concrete pores
• Chemical Types– Sodium
– Potassium
– Lithium
– Magnesium Fluorosilicate
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Silicates vs. Siliconates
• Silicates need to penetrate into the substrate to chemically react and then harden
• Siliconates need to be exposedto the atmosphere to react with carbon dioxide to develop a silicone resin
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Where to Use
• Interior or exterior concrete
• Increased abrasion resistance
• Potential dusting issues
• Warehouses, lobbies, schools, churches
• Integral Colored, Dry Shake Color
Hardeners
• Ground and polished surfaces
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Ground and Polished Concrete
• Reduce diamond wear
– Apply prior to using resin bond diamonds
• Develop shine sooner
– Increased hardness will minimize unwanted
scratch pattern
• Increase surface density
– Minimize liquids from penetrating / Dyes
• Increase surface durability and retain
shine longer
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Penetrating Sealers
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Penetrating Sealers
• Silanes & Siloxanes
• Penetrating – invisible
• No color enhancement
• Water-borne ( with co-solvent)
• Water and/or oil repellant
• Roller or pump sprayer
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Basics of How they Work• Increase surface tension of the concrete
pores
• Water will bead on the surface
• Allows vapor to transmit through
• Lower cost protection
• Need to be re-applied
• Visually non-existent
• Non-film forming
– Will not increase abrasion resistance
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Treated Untreated
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Where to Use
• Water and oil protection
• Parking lots
• Masonry
• Vertical or horizontal applications
• Bridges
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Advanced / Penetrating
Crystalline Products
(Growth Crystals)
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Crystalline Products (Growth
Crystals)• Interior or exterior
• Outstanding long lasting protection
• Superior interior vapor mitigation
• Superior exterior protection against salt,
mag. DOT de-ice brines.
• Broomed or hard troweled concrete
• NO VOC’s
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Dubuque Bridge
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Crystalline Products
(Growth Crystals)• Crystal Growth liquid applied products protect,
preserve and permanently waterproof concrete or
masonry substrates without any film formation or
color change to the substrate.
• Crystal Growth liquid applied products are odorless,
colorless, a clear water based liquid with very low
viscosity, allowing it to penetrate deeply into any
concrete or masonry substrate.
• Crystal Growth liquid applied products are a water
based product group which contain no VOCs.
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Keosauqua Bridge Application
Application Over Waterways Without The Costly and Time Consuming Expense of Bridge Encapsulation
and Containment
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West Des Moines Bridge
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WDM Bridge Application
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Crystalline Products
(Growth Crystals)
• Eliminates Moisture Transmission through the Concrete Matrix
• Protects:
– Concrete against Freeze-Thaw Spalling
– Steel from Corrosion
– Chemicals
• Reduces:
– Water Penetration from the Surface
– Surface Scaling
– Alkali Silica Reactions (ASR)
– Maintenance (due to enhanced moisture protection)
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Concrete Parking Lots
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Untreated / Treated
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Permanent Protection
• Seals hairline cracks up to one 16th inches in width
• Seals inner surface of large cracks preventing water from causing further damage
• Increases the adhesion property of repairing materials to concrete in the repaired cracks
PROTECTION ZONE REPAIRED CRACK
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Hygroscopic & Hydrophilic
Characteristics of Crystals
Dry Conditions Wet Conditions
EVAPORATION ABSORPTION
Crystals
Shrinkage
Hydrophilic
Crystals
Expansion
Hygroscopic
Crystals Growth Towards
Moisture
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5/23/11
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5/23/11
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6/6/12
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9/20/12
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12/22/12
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2/11/13
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Common Sealer
Issues
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Line Saver
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Saw Cutting Contamination
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Na or K Silicate
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Sealer Whiting
WASH IT …..DON’T STRIP IT
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Sealer Whiting
WATER VAPOR or CONTAMINATION
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Poor Surface Preparation
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General Rules During Selection
• Less maintenance on the floor, higher
durability factor for the sealer
• VOC Content
• Future Maintenance cost / Re-application?
• Moisture vapor & relative humidity
• Gloss level
• Cure time
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General Rules During Selection
• General concrete use
• Cost
• Interior or Exterior
• Surface finish
• Contractor product knowledge
• Project timeline (certain products
cannot be pushed)
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QUESTIONS?
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Thank youMark Chew
Specialty Division Manager
Logan Contractor Supply
641-757-2555