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Concrete Recipes: Terrific Terrazzo

If you're a sucker for complex geometrics, take a look at our first technique - a happy combination of color and complexity. This month's second recipe demonstrates a great way to achieve an incredibly striking, elegant effect with the simplest of ingredients.


A far cry from the seas of monochromatic squares that comprise too many terrazzo installations, these techniques give you a taste of what terrazzo can really do.

If you're a sucker for complex geometrics, take a look at our first technique - a happy combination of color and complexity. This month's second recipe demonstrates a great way to achieve an incredibly striking, elegant effect with the simplest of ingredients.

Helicopter Heaven
Richard Dreyfus, Missouri Terrazzo Co. - St. Louis, Mo.
(314) 361-8090
Inspired by the rotors of the helicopters the client manufactures, this intricate, precise design shows off not only the contractor's technical aptitude but also terrazzo's design versatility.

Ingredients:

  • Terrazzo & Marble Supply Terroxy Iso-Crack Epoxy Membrane
  • Fiberglass scrim material (to use in case of cracks in the substrate)
  • T&M Supply Terroxy Primer
  • T&M Supply Signature Divider Strips (3/8 inch by 1/8 inch)
  • T&M Supply Terroxy Resin Matrix
  • T&M Supply Terroxy pigments: Dizzle Yellow, Sun Valley,
  • Mayan, Navy Wool
  • Cactus Canyon Quarries marble chips
  • Heritage Glass recycled glass aggregate
  • T&M Supply recycled one-sided mirror glass aggregate
  • Sherwin-Williams Terrazzo ATF 20 Filler
  • T&M Supply Terroxy Water-Based Acrylic Sealer
  • Special equipment used: Blastrac shotblaster with 390 shot, AutoCAD computer software, laserjet cutter, hot glue gun
  • or epoxy adhesive, Terrco Model 2000 floor grinder with
  • 40-, 80-, 100-, 200- and 400-grit diamond discs

Directions:

 

  • Design your pattern in AutoCAD and, using a laserjet cutter, cut out full-size cardboard templates for each element.
  • At the site, prep your surface by shotblasting and grinding to get a smooth, flat profile to ensure the epoxy will bond well to the substrate.
  • Fill any exposed cracks with small, unpigmented amounts of Terroxy Resin Matrix. Then create a patch by covering the filled cracks with the Terroxy Iso-Crack Epoxy Membrane and a scrim.
  • Using the cardboard templates, lay out your design on the surface and trace the edges of each element. Remove the templates and, using hot glue and epoxy adhesive, affix your divider strips to the lines of the design.
  • Put down a coat of Terroxy Primer over the entire area to ensure a proper bond.
  • Mix your batches of the Terroxy Resin Matrix, one batch for each pigment. Each batch gets 180 pounds of aggregate - 75 percent marble chips, 15 percent recycled glass and 10 percent recycled mirror - plus a small amount of ATF 20 Filler.
  • Fill in the pattern with the appropriate colors according to your design, and let it set completely.
  • With your floor grinder, do multiple dry passes, first with 40-grit diamonds and then with 80-grit.
  • After this is completed, grout the entire floor using the appropriate colors of epoxy matrix and let it set.
  • Use the grinder to remove excess grout and polish the surface. Do several runs of wet grinding, first with 100-grit diamonds, then 200-grit and then 400-grit for the finish.
  • Clean the surface thoroughly and seal the floor with the Terroxy sealer.
     

     

For an upscale hotel like the W in Miami Beach, elegance is anything but optional. This effect, using incredibly simple ingredients, provides a deliciously luxe look for the lobby.

 

Linear Thinking
Artistic Surfaces - Pompano Beach, Fla.
www.artisticsurfaces.com
For an upscale hotel like the W in Miami Beach, elegance is anything but optional. This effect, using incredibly simple ingredients, provides a deliciously luxe look for the lobby.

Ingredients

  • Dry-pack mudbed: Key Resin Moisture Vapor Treatment #635
  • Cement-IT Western White portland cement
  • Klein and Co. Plex-A-Bond acrylic additive
  • Coarse sand
  • Key Resin Epoxy Terrazzo #108, white
  • Manhattan American Terrazzo Strip plastic divider strips (3/8 inch by 1/8 inch), black
  • Continental Terrazzo Supply marble chips, China White in size 0 and 1
  • Burnett Athletics Plus 5 Field Marker white marble dust
  • Johnson Wax Professional Plaza Plus sealer
  • Special equipment used: Water-jet cutter, Blastrac 1-15DS Global shotblaster with S-460 steel shot, paint roller with at least a 1/2-inch nap, Terrco Model 3100-3P floor grinder, 24-grit diamond segments, 80-grit and 120-grit carbide stones

Directions

  • As this recipe is simple black and white, it works best when creating line art. Using a water-jet cutter, cut out a set of full-size templates for your design.
  • Shotblast the floor with Blastrac 1-15DS and S-460 steel shot to open the surface of the concrete.
  • Clean floor thoroughly with a vacuum.
  • Mix the Moisture Vapor Treatment and put down one coat of the product with a paint roller.
  • Mix the dry-pack mudbed using the portland cement, coarse sand and Plex-A-Bond, at a ratio of 4 parts portland cement to 1 part each of sand and Plex-A-Bond. Screed the mixture to the proper elevation.
  • Trace design on the mudbed using your template, and then affix your divider strips along the lines of the pattern.
  • Mix Key Resin Epoxy, which comes as a two-part system, at a 5:1 epoxy-to-hardener ratio, and mix for 5 minutes.
  • Add 25 pounds of Plus 5 as filler to help stiffen the epoxy mix. Let mix for 2 minutes.
  • Add a batch of chips - half of them size 0 and half size 1 - and let mix for 3 more minutes. Pour mix on the floor and spread with a hand trowel.
  • Let cure for 10 hours before beginning grinding and polishing.
  • Start with a rough grind (dry or wet) using the 24-grit diamond segments. Make sure to make an even number of passes so the floor will be even and flat.
  • Next, a medium grind with 80-grit carbide stones.
  • Finally, a fine grind with 120-grit carbide stones.
  • Mop the floor with clean water after the fine grind. Rinse and repeat a couple of times.
  • Allow the surface to dry for 4 hours before applying a coat of sealer with a paint roller.

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