We could help but would like more info. Otherwise I suggest contacting
Balvac +1 (800) 553.2302 for vacuum injection which usually requires little
surface prep or Sika which is more typical port-type injection. 
Eric

 -----Original Message-----
From: 	[log in to unmask] [mailto:[log in to unmask]]
Sent:	Mon Jul 10 09:14:51 2006
To:	[log in to unmask]
Subject:	[BP] Concrete Epoxy Repair

To All Masonry Experts,
 
    I have a situation with a concrete slab which I need advice on.  I have
a 5000 PSI 6" thick slab with radiant heat piping cast in it at the 3"
horizon.  The slab is 30' by 48'.  I had not gotten perimeter drainage in
place or cut control joints in the slab before getting a deluge of work and
occupying the space.  Last week we had a huge amount of rain which, I
suspect, caused some uplift under the slab.  We then rolled some heavy
timbers on the slab causing considerable pulsed vibration.  The combination
caused the slab to crack in a random line which is not where the control
joint should be and does not neatly line up over the line where the radiant
heat pipes are sleeved to protect them from slab movement.  My question to
masonry repair experts is this:  Can you recommend a low viscosity epoxy and
an installation method which can stabilize this crack and allow me to get
the slab to crack at a cut control joint?  Said crack is, essentially,
closed and simply a visible hairline.  There is the possibility of drilling
holes along the crack to create wells for a liquid and possibly apply
pneumatic pressure to force a product into the crack.  I think I could drill
about 1 1/2" deep relatively safely.  I would appreciate any expert advice
out there.
 
Thanks,
 
David Dauerty
To The Line Timber Frames, Inc
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