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DCI vs Higher Strength Concrete

DCI vs Higher Strength Concrete

DCI vs Higher Strength Concrete

(OP)
Good afternoon all,

I am working on a marine research facility framed with concrete beams and two-way slabs.  Concrete mix values were set per ACI:  0.40 max w/c, 5000psi min, increase in rebar cover, etc.  I have included a DCI (corrosion inhibiting) admixture for a few research labs that will be directly exposed to salt water.  The contractor is requesting to subtitute a higher strength mix (6-7ksi) in lieu of the DCI.  Is there a concrete strength where the DCI is not as effective or may even be elimiated due to the more dense(higher strength) mix?

RE: DCI vs Higher Strength Concrete

Higher density is typically better than DCI, assuming concrete quality, consolidation and increased cover are maintained.

RE: DCI vs Higher Strength Concrete

The use of GGBS cement replacement is beneficial.

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