slabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacement slabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacement
Efflorescence
slabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacement
slabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacement
"Simple Sealant Solutions"
713.907.8410
Efflorescence
MasticMasters | Expansion Joints | Concrete Stains | Concrete Sealants | Concrete Polishing | Epoxy Topcoats | Crack Repair | Contact Us
slabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacement
MENU
Urethanes
Dow Corning Silicone
TrimGasket
Water Based Stains
Acrylic Stains
 
Restoration & Maintenance
 
Liquid Dazzle
Granite & Terrazzo
Thin Film
 
 
 
 
 
 
     
Color Charts
     
Water Based Stains Card
Acrylic Top Coats Card
 
 
Joint Sealant Color Charts
Sikaflex Color Card
Sonneborn (BASF)
 
NEWS:
Preventing Concrete Cracks
Money Saving Offers
Water Proofing & Protection
Efflorescence
Service Area
WHY Sealing is Needed!
Referral Program
Mission Statement
Angie's List Service Award
DIY vs. MasticMasters
 
 
DMCA.com
 
 
 
 
 
 
 
 
 
 
 
 
 
slabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacement

Efflorescence

Natural Stone Restoration
What causes efflorescence and how do you remove it?

Efflorescence occurs with all concrete and is the most frequent problem that concrete contractors face with colored concrete. Owners don't care about “plain” concrete, but colored concrete is another matter. They complain that their contractor didn't give them the color they ordered, and sometimes they withhold payment.Efflorescence is caused when soluble salts and other water dispersible materials come to the surface of concrete and mortars. It's induced by low temperatures, moist conditions, condensation, rain, dew, and water added to the surface of fresh concrete to assist troweling. It can occur very soon after exposure to moist or cool conditions or gradually, especially when it comes from within the concrete or from the subgrade.Any material containing portland cement results in efflorescence. The most usual reaction occurs when calcium hydroxide (lime) formed in the hydration reaction of portland cement (approximately 140 pounds per cubic yard of concrete) is transported by water to the surface through capillaries in the concrete. There it combines with carbon dioxide from the air to produce calcium carbonate (an insoluble material) and water. But efflorescence can also be caused by hydroxides and sulfates of either sodium or potassium, which are much more soluble in water than calcium. And they form efflorescence more rapidly than calcium hydroxide. These salts can come from cement, aggregates, water, or admixtures.Efflorescence is normally white and shows up more on darker colors than white or light gray because of the contrast. Only 0.2 ounce of calcium carbonate per square yard of surface is needed to cause a significant shift in color. Some forms are very difficult (if not impossible) to remove, while others are easy—especially if they are removed right after they form.

Removing efflorescence The easiest time to remove calcium hydroxide efflorescence is before it combines with carbon dioxide. Up to this time it will dissolve in water, so pressure washing or wet scrubbing will put it in solution with water so it can be rinsed away. You must be careful to rinse the surface with fresh water so that no residue is left to dry on the concrete. Use an air jet or a wet vacuum to remove any standing water. Any remaining solution will cause new efflorescence to appear.When efflorescence proceeds to the calcium carbonate phase, it becomes insoluble and is much more difficult to remove—perhaps impossible. The application of a mild acid solution becomes the first course of action. These acids include vinegar (5% acetic acid), muriatic acid, or citric acid. Muriatic acid is purchased in full strength and must be diluted. So it's the most dangerous, requiring proper safety gear.After acid washing, slabs should be rinsed thoroughly and neutralized with baking soda (sodium bicarbonate) or an equivalent. Acid residues can harm plants. The reaction products of acid on concrete are all soluble calcium and iron salts, which can cause more efflorescence.When efflorescence can't be removed with acid washes, other commercial products are available. One is ethylenediamine tetraacetic acid (EDTA), which rapidly dissolves calcium salts. EDTA will also damage concrete, so it's best to test it on an inconspicuous sample area first.

Preventing efflorescence There are a few things you can do to reduce the possibility of efflorescence. Including either Class-F fly ash or metakaolin can lock up significant amounts of calcium hydroxide in the concrete. And as stated earlier, the efflorescence reaction is driven by water, either water from above or below a slab. Only vapor barriers can prevent the movement of moisture from the subgrade to the surface of a slab. And the application of sealers and coatings can prevent surface water from penetrating slabs. Apply them as soon as surfaces are clean and dry.

slabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacement
slabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacement

Houston, North Houston, South Houston, East Houston, West Houston, Northwest Houston, Southwest Houston, Southeast Houston, Northeast Houston, Harris County, Montgomery County, Brazoria County, Fort Bend County, Deer Park, La Porte, Pasadena, Shoreacres, Seabrook,jersey Village, Webster, League City, Dickinson, Santa Fe, Pearland, Friendswood, Texas City, Alvin, Angleton, Bunker Hill, Bellaire, Missouri City, Richmond, New Territory, Greatwood, Stafford, Sienna Plantation, Tomball, Lake Houston, The Woodlands, Kingwood, Atascocita, Cypress, Jersey Village, Bear Creek, Copperfield, Beaumont, Spring, Conroe,  Humble, Tiki Island, Katy, Sugar Land, Baytown, Magnolia, Cleveland, Freeport, Webster, and Clear Lake

HOA approved and recommended

URETHANE SEALANT, slabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacement
slabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacement
slabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacement
slabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacement
slabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacement
slabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacement
slabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacement
slabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacement
slabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacement
slabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacement
slabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacement
slabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacement
slabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacement Sonneborn color chart Sikaflex Color chart
slabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacement

Pay Invoice On Line!

slabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacement

slabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacementslabgasket, Trim-A-Slab, Arrowjoint, Gaparmour expansion Joint Replacement
Privacy Policy All Rights Reserved   Mastic Masters 2007  DBA#B438940
Site Design by ZEOGRAPHIX STUDIOS
Insured for your Protection
Houston, North Houston, South Houston, East Houston, West Houston, Northwest Houston, Southwest Houston, Southeast Houston, Northeast Houston, Harris County, Montgomery County, Brazoria County, MasticMasters, Fort Bend County, Deer Park, La Porte, Pasadena, Shoreacres, Seabrook, Webster, League City, Dickinson, Santa Fe, Pearland, Friendswood, Texas City, Alvin, Angleton, Bunker Hill, Bellaire, Missouri City, Richmond, New Territory, Greatwood, Stafford, Sienna Plantation, Tomball, Lake Houston, The Woodlands, Kingwood, Atascocita, Cypress, Jersey Village, Bear Creek, Copperfield, Beaumont, Spring, Conroe, Humble, Tiki Island, Katy, Sugar Land, Baytown, Magnolia, Cleveland, Freeport, and Clear Lake

Scroll To Top