Barry,
If you are going to attempt this repair you must deep clean all the terrazzo chips that are in tack. If you don’t clean property the cement will not bond. Use a Portland cement and use 100 % latex additive to the cement use no water. Float the cement over the chips allow to dry for at least 3 to 4 days ( the longer the better) then come back and you can probably start with a 50 grit resin pad then 120 after the 220 you may need to refill any areas where you pull the cement from the stones or you open up small pin hole. This process is similar to what the terrazzo installer call grouting the floor after the initial course grinds. Once you re-fill allow to dry again hone off the excess then polish or leave at a honed finish. If left at a honed finish be sure to seal. This is not a fast process so charge for the time and effort.
John E Freitag
Director
The Stone & Tile School
Office 407-567-7652
Cell 407-615-0134
jfreitag@thestoneandtileschool.com
www.thestoneandtileschool.com
From: PJ Raduta [mailto:pjraduta@diamondstoneandtilecare.com]
Sent: Wednesday, September 12, 2012 9:03 AM
To: Stone and Tile PROS Technical Support
Subject: [sccpartners] Concrete Terrazzo Repair
Hey Partners,
I have been asked to repair an old terrazzo shower tray. Much of the concrete in the terrazzo has eroded away, but the stones are intact and not loose. My thought is that I can use a concrete bonding agent to fill in some new concrete, let it set, and then grind/hone it to a nice finish. My only hesitation is that there is only about 1/4" of missing concrete, and I want to make sure that it bonds correctly and does not fall apart quickly. Does anyone have any wisdom as to the best way of going about this?
Thanks,
PJ
--
PJ Raduta
Diamond Stone and Tile Care
(267) 349-0069
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