In article ,
Larry Jaques wrote:

On Tue, 13 Apr 2010 09:48:16 -0400, the infamous Joseph Gwinn
scrawled the following:

In article ,
Larry Jaques wrote:

On Mon, 12 Apr 2010 23:45:58 -0400, the infamous Joseph Gwinn
scrawled the following:

In article ,
Larry Jaques wrote:

On Sun, 11 Apr 2010 12:54:39 -0400, the infamous Joseph Gwinn
scrawled the following:

In that case, drill some holes knock out some chunks, clean it out,
vacuum it, spray it with water, and float a layer of real crete on
top. 5,000psi with strands might work in a woodworking shop with
lighter machines, but you'll need a whole new floor for the big,
heavy, metalworking machines.

Yep. Ain't going to happen. Too much like work.

Got Fresh?


Well, actually the metalworking machines are not wearing the floor out,
it's the owner's constant pacing.

Grok that. So sit down in front of the machine, chip out a pad 0.5-1"
deep, sweep and vacuum it out, then pour a small fillup of patching
crete in there. Take a couple hours apiece. Duck soup, wot?
If you don't want to do the work, put a respirator on a local college
or high school kid (or Fresh!) and let them do it for you.

I suspect a rubber floor mat right in front of the machine is easier.

Oh? I thought you might want to fix any divots first.

No divots yet. Only a very shallow dishing. From pacing.


Then you can wear out your pacing shoes, not the floor. It'll also
reduce the concrete dust you breathe, Joe, and that makes it all worth
doing.

Well, the dust is very coarse and stays on the floor until swept up. The
dust is basically fine sand coated with a little hardened cement.

That's great. Fine cement dust gets to me in a REAL hurry. I have to
put on the respirator before opening a bag of fence post mix.

Come to think of it, most of the old, broken-down cement I've seen is
fairly coarse. I work more with fresh bags, so that superfine stuff
was my mind's eye's first picture.

Unhardened cement is very active chemically as well. Hardened cement is almost
inert.


The big improvement in breathing came when I retired the last coolant mister
and went to dribble/flood cooling. Used to be that the shop air was a fog bank
after a few hours.

That can't be fun to breathe. Good move.

Yes. I got tired of having to wear a respirator while machining. The wife
eventually stopped making comments about the Preying Mantis in the machine shop.
More to the point, the mist didn't work nearly as well as dribble/flood cooling.
Quantity matters.


Joe Gwinn