[TowerTalk] Cure for slump in fresh base pour?
FireBrick
w9ol at billnjudy.com
Mon Sep 6 14:30:47 EDT 2004
As a retired licensed Chicago mason contractor I can offer a simple fix.
Steel columns are never set directly onto the concrete piers.
They always leave a small gap.
They fill this gap with a product called Four Star non shrinkable grout.
(that is a local brand name)
It's a fast drying cementicious mix.
I suggest you mix up a small amount, pour it onto the concrete and then place your metal
base down with enough pressure to squeeze out the excess. Use a small tool to cut the
excess off at the edge of the base with a slight bevel.
Level and let cure.
This prevent water and the accumulation of leaves etc. under the metal base which helps to
prevent rust formation.
A bag of grout only costs a few bucks, You will end up throwing the rest away as it will
harden once the bag is unsealed.
If you happen to see a construction site where they are setting steel, you may be able to
trade a six pack for a gallon of grout.
----- Original Message -----
From: "Tom Hybiske" <thomas.hybiske at verizon.net>
To: <towertalk at contesting.com>
Sent: Monday, September 06, 2004 1:10 PM
Subject: [TowerTalk] Cure for slump in fresh base pour?
I poured a base for a short tower over the weekend. I'm installing a Rohn clone tilt-over
base plate. After the pour, a thin sheet of plywood and the base plate was used to align
6 J-bolts in the wet concrete. I guess I must have leaned on the center of the template
because after removal of the template, there is a nice 3/16-1/4 in. slump at the middle of
the base which collects and holds water. But as hard as I tried to foul this pour up, the
base is dead level. Case of luck beats skill I guess. Now I'm afraid of water will
collect and freeze under the base plate and cause havoc. Is there skim coat material
available that I could trowel on to remove the slump? Should I just leave it as is and
not worry about it.
Tom, K3GM
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations",
and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman,
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