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Re: Aggregate Spec (Re-post)

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Tom, ASTM spec that appears to "directly" address in the issue was
listed in PCA's "Design and Control of Concrete Mixtures".  It was where I
found the reference to ASTM C 294 that I suggested taking a look at when I
responded last night.  It appears that my suggestion might be worthwhile
as Harold (who is much smarter than I and likely much more familiar with
ASTM C 294) just gave a similar yet more specific suggestion.


Adrian, MI

On Thu, 29 Dec 2005 Tom.Hunt(--nospam--at) wrote:

> Paul,
> If you have access to PCA, "Design and Control of Concrete Mixtures", look
> at Chapter 5 under "Fire Resistance and Thermal Properties".  The fire
> resistance and thermal properties of concrete depend to some extent on the
> mineral constituents of the aggregates used.  Concrete containing a
> calcareous coarse aggregate performs better under fire exposure than a
> concrete containing quartz or siliceous aggregate such as granite or
> quartzite (see ACI 216 and ACI 221).  You might be able to find an ASTM
> that regulates or defines the thermal expansion rate of aggregates.  Hope
> this gets you in the right direction.
> Thomas Hunt, S.E.
> Fluor
> "Paul Feather" <pfeather(--nospam--at)>
> 12/28/2005 03:45 PM
> Please respond to seaint
>         To:     "SEAOC List" <seaint(--nospam--at)>
>         cc:
>         Subject:        Aggregate Spec (Re-post)
> .
> This is a re-post
> Concrete cover for fire protection is based on aggregate type, carbonate
> or siliceous.  What would be the appropriate ASTM reference to ensure
> carbonate aggregate?  In other words, "All concrete aggregate shall be
> carbonate in conformance with ASTM (Fill in the blank)".
> I do not see where there is a distinction in C-33.
> Paul Feather PE, SE
> pfeather(--nospam--at)
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