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Re: Shotcrete Loading

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Greetings,

I've used guniting in several relatively small scale domes. The problem is
that the procedure does not give you the specified concrete design strength.
Therefore, samples should be taken and tested prior to guniting the actual
structure.

-----Original Message-----
From: Laurence B. Oeth III <viacalx(--nospam--at)europa.com>
To: seaint(--nospam--at)seaint.org <seaint(--nospam--at)seaint.org>
Date: Sunday, June 27, 1999 2:28 AM
Subject: Re: Shotcrete Loading


>Roger Turk wrote:
>>
>> A. Yango,
>>
>> Shotcrete = Pneumatically Placed Mortar (PPM) = Gunite (TM)
>>
>> The method where mortar (concrete) is blown against earth/forms using
>> compressed air.  The mortar can be a wet mix or a dry mix where the water
is
>> inserted at the nozzle.  Most commonly used in construction of in-ground
>> residential swimming pools and slope protection at bridge abutments.
>>
>> A. Roger Turk, P.E.(Structural)
>> Tucson, Arizona
>>
>> A. Yango wrote:
>>
>> I just would like to ask what is shotcreting. We might have an equivalent
>> term for that here in PI. Thanks.
>>
>NOTE: Shotcrete and gunnite are not the same.  Shotcrete is a concrete
>mixture which is mixed and pumped and sprayed out the nozzle.  With
>gunnite, water and cementitious materials are mixed at the nozzle.
>(...or did I get those two reversed?  Never can remember)  Anyway, both
>have advantages and disadvantes and are sensitive to the experience of
>the applicator.  Perhaps more for the gunnite.
>
>Laurence B. Oeth, P.E.
>
>