First how large is large? ¼ inch, ½ inch or more?
There is 3 ways to fix this .
If the area is large over ½ inch you could purchase terrazzo
chip and fill the gaps with that using Portland cement and a concrete dye to
match the existing terrazzo
If you elect to go this route then you will need to make the
opening large enough so the marble chips will fit into the hole, are the chip
in the existing terrazzo #0 #1 #2 or larger. This you will need to know prior
to ordering. Hopefully there are small chip #0 and #1 .
If this is the case then take Portland Cement for and dye to
match your current base, when mixing you need to use 90% latex additive and
only a small amount of water. Then add you chips, and mix the cement base and
the chips together.
Then fill the area , when filling the area you need to slightly
over fill the area so you can grind it flat once it cures.
After the hole is filled then take some terrazzo chip on spread on
top and using an object that you can roll with roll these loose chips into the hole
this will make sure you have the proper amount of chip in the repair once you
On cement based terrazzo allow it to cure for 24 to 36 hour
depending upon the depth of the fill.
Then use a medium to coure grinding wheel and start grinding
until you are flat with the existing floor.
Then run up the rest of your grits until you are ready to polish
If during the honing process small hole open up you will then
need to mix up a grout material of Portland Cement anhd the dye color grout the
floor and let it cure for 24 hour , hone off the excess and then polish or
If the hole are not too large then you could mix up a polyester
fill ( Akemi K-Bond Etc.) and add the color and make the fill one color.
You could also add terrazzo chips to the polyester fill and then
grind them off once cured.
The third way would be to mix up Portland cement add the dye and
fill the hole with a solid color, some will say you can use grout the color of the
base. This will work but I recommend if you go this way then be sure to mix the
filling materials with a latex additive 90 %
Keep in mind when using latex additive the pot life of the
product is shorten
Hope this helps
John E. Freitag
The Stone and Tile School
Good morning group,
I hope all is well. I have a question about terrazzo. This is a cement based terrazzo, dark in color and the area I am wondering about is too dark to take a photo. It is in a bar where the sodas drip on the floor. After a while the terrazzo floor has several large gaps in it because of the acids of the drinks. What would be the best thing to do to fill in these holes?