type 10 (general use) and type 30 (high early) on the same mix

[Mixtli]

Hi everyone,

Just wondering what happens if we mix both types of cement on the same mix? do they interact negatively between them? or will it become like a mid strength HE?

Thanks all.

M.

 

[MotorCity]

I have not seen anything on the effects of such a practice, but here is my prediction. The cements have different heats of hydration and will cure at different rates. As such, any drying shrinkage that you would have from a single mix would be increased due to additional differential shrinkage. Aside from the cement, the components of the mix will also vary in quantity and/or type, so there are other interactions going on. My advice: don't do it (or if you do it, let us know what happens)

 

[TehMightyEngineer]

Ooooo, I really don't like that. Agree with motor that differential shrinkage would likely occur. That said, I don't think it couldn't work just that I would look at better ways to do this. For example, type 10 (type I in the US) with additives to get the properties you need.

Professional Engineer (ME, NH, MA) Structural Engineer (IL)
American Concrete Industries

https://www.facebook.com/AmericanConcrete/

 

[dik]

I have no idea if there is any chemical interaction... as noted above, likely a bad idea...

Dik