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Components of Water-to-Cement Ratio

Components of Water-to-Cement Ratio

Components of Water-to-Cement Ratio

(OP)
Say that the cement-like components of a mix design consist of portland cement, fly ash, and ground granulated blast furnace slag (ggbfs).

Would the water-to-cement ratio be determined by dividing the water weight by the sum of (portland cement + fly ash + ggbfs)?

Thanks.

---Tom Nally
 

RE: Components of Water-to-Cement Ratio

my understanding is generally it is "cementitious" materials not just "portland cement". Usually a portion of the portland cement is "replaced" by the fly ash leaving the same amount of cementitious materials in the mix.

RE: Components of Water-to-Cement Ratio

Your understanding of the situation is pretty good... Dik

RE: Components of Water-to-Cement Ratio

Yes.

RE: Components of Water-to-Cement Ratio

To help remove some of this confusion, sometimes the w/c ratio is expressed as w/c+p for water-cement plus pozzolans or w/cm for water-cementitious materials ratio.

Greg

RE: Components of Water-to-Cement Ratio

Now you've confused it <G>... w/c + p  or w/(c+p)?... I generally consider the c to mean cementitious materials and the w/c seems to work OK... (no insult intended... just don't have the self control I used to have...

Dik

RE: Components of Water-to-Cement Ratio

For high strength concrete, 80MPa and higher, you will have to add the admixture water content to the added water to get the w/c ratio.

RE: Components of Water-to-Cement Ratio

Thanks for the cover Dik, I forgot the parentheses, twas a very long day.  Sorry, didn't mean to confuse the issue.

Greg

RE: Components of Water-to-Cement Ratio

just jokin'... I fully understood what you meant!

Dik

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