gunite vs shotcrete
Leo...@aol.com
other than application of the product. Are the times for curing
different for each and if so what are the differences.
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Steve Hemphill
Leo...@aol.com wrote:
> Kindly advise if there is a difference between shotcrete and gunite
> other than application of the product. Are the times for curing
> different for each and if so what are the differences.
I've never used gunite. In public works construction I think it's
considered a mess to use, pumping the dry mix, then mixing with water
at the gun. Shotcrete, however, works well with 3/8" ready mix. As
far as curing times, strength, etc, I think that depends on the mix
itself. With shotcrete you can pretty much use any "medicine" as with
regular concrete. I don't know if that's true with gunite.
Mostly I've heard of gunite with pools and other small applications.
Steve H
P.S. Don't wear contact lens around shotcreting, or at least stay
upwind. It's 10 times worse than dirt.
Per Fidjestøl
a shotcrete process using dry materials. Shotcrete is, in principle,
divided into dry and wet, where wet shotcrete is delivered as readymix,
while water and liquid additives are added to the dry shotcrete at the
nozzle.
Steve is correct in that the dry process used to be a messy operation, and
still is many places. however, the use of new mineral and chemical
additives have removed much of this nuisance, to the extent that I
personally have been in a 3.5 m dia tunnel where visibility was near
perfect during (dry) shotcreting, and rebound was enormously reduced, down
to something like 7 percent to my recollection.
Recommend reading up on some of Rusty Morgans stuff, and also ACI
Committee 506.
Steve Hemphill wrote:
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Per Fidjestřl
Elkem ASA Materials
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per.fi...@elkem.no
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