CEMENT IN GLAZE ?

[Gonen]

what can one earn (or loose )bye using Portland cement in glaze ?   dose anyone ever try ? 

as "Portland cement clinker is a hydraulic material which shall consist of at least two-thirds by mass of calcium silicates, (3 CaO·SiO₂, and 2 CaO·SiO₂), the remainder consisting of aluminium- and iron-containing clinker phases and other compounds. The ratio of CaO to SiO₂ shall not be less than 2.0. The magnesium oxide content (MgO) shall not exceed 5.0% by mass."

thanks 

[Callie Beller Diesel]

As always, you can try it to see what happens in the name of curiosity and science, but Portland cement is going to be wildly impractical as a glaze material. The slaked lime hardens when added to water, which is going to, shall we say, present issues with keeping it in suspension.

When a manufacturer lists unspecified “other compounds,” that  usually means it’s something pretty important in the recipe, but they don’t want to tell you what it is. Those “other compounds” might not make any kind of difference in a glaze, or they might do all kinds of things. 

[Russ]

Ive used portland cement as a glaze for many years.  Mixing a small amount at a time and using it within an hour works best.  I then fire it to c10 and it looks quite similar to a runny ash glaze.  Portland is comprised of lime, magnesium, iron ox, and silica.

Like Callie said its not something you want to mix alot of because it sets fairly fast.

 

[Gonen]

and if i paint with that on the bisque and than glaze with clear glaze do you think it will incorporate into the glaze or just will create bubbles ?

I'm a very beginner as you can understand   

[Russ]

Experiment experiment experiment. Give it a try with many variables and see what works the best. Dont forget to document and mark what was done to each test piece.

[LinR]

Don't forget to put a cookie under your experiments!  Lin