yep, I agree with Fred.  The tip of the nails blend in with the chips.
Here's a video I done on years ago.  I wish I sounded better on it, but what the heck.  I'm just glad people are looking at it and that the customer isn't removing the tack strips the wrong way

http://www.youtube.com/watch?v=CIIjfEVhrIQ

Bill

On Mon, Apr 9, 2012 at 8:20 AM, Fred Hueston <fhueston@gmail.com> wrote:
Good advise from all, only thing I would add is the next time someone needs to take up some carpet strips or anyother anchors to the terrazzo..Take a grinder with a diamond blade on it and cut the nails off flush with the terrazzo...The nail will blend right in and a repair wont be necessary


On Sun, Apr 8, 2012 at 10:26 PM, john jackson <kcstoneguy@yahoo.com> wrote:
just looked at this pics...for these you want to take an electric drill with a masonry bit to clean out the holes...I would set the chips in the holes with epoxy, grind it down, then razor blade the color matched epoxy over the floor..this is a pretty fast repair job.


From: Freddie DeJesus <info@eliteflooringandrefinishing.com>

To: Restoration and Maintenance <sccpartners@stoneandtilepros.com>
Sent: Sunday, April 8, 2012 6:00 PM
Subject: [sccpartners] Terrazzo repiair

Hi,
Can anyone recommend the best way to repair the holes and to have it look as close to the floor as possible? Where can I get the chips? The floor is cement based. Is there a certain kind of concrete to use?

--
Wilfredo DeJesus
Elite Flooring Inc.







--
Frederick M. Hueston PhD
www.stoneforensics.com
www.stoneandtilepros.com
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