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Re: Air Entrainment in Concrete

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Even this concrete satisfies the 28-d strength
requirements (but I don't think it will), it will be
suspectible to many durability problems when long term
performance of concrete is considered.  In my opinion
the answer to your question is, "Yes, you should be
concerned."

Alp Eren Yurtseven

--- "W. Gray Hodge" <ghodge(--nospam--at)hodgedesign.com> wrote:
> On a current project, our 7-day cylinder breaks were
> coming in very low
> (1500 psi for 4000 psi 28-day spec.).  Upon
> investigation, it turns out
> that the batch plant added 6 oz. of admixture
> instead of 0.6 oz. per the
> mix design.  The owner is willing to accept the
> concrete, provided the
> 28-day strength is adequate for the design loading.
> I am concerned
> because I do not know the possible implications that
> high air
> entrainment may have for the long term performance
> of the concrete.  The
> application is a pit for bringing underground
> utilities into the
> building.
>
> Should I be concerned?
>
> Gray Hodge
>
>
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