Hello,
Liquid screeds come in (at least) two types: AnhyidrIte (CaS04,H20) and HemihydrAte (2CaSo4,H2O). One is Gypsum and the other, supposedly is Plaster of Paris--but untill now I always thought Plaster of Paris and Gypsum were the same thing. Actual chemical properties don't concern me. Practicalities, however, are a different matter. So:
1. Which is better? In particular, which is stronger? (Do either react with iron (such as with steel reinforcing mesh?)
2. I don't see Plaster of Paris taking tile cement very well. Any comments on that?
3. Are these screeds PURE Gypsum and/or Plaster of Paris? I.E., are they only that? Or is the Gypsum/Plaster of Paris merely their main constituent and to which other materials are added to make them more durable and stronger?
Thanks in advance,
Phrixos
Liquid screeds come in (at least) two types: AnhyidrIte (CaS04,H20) and HemihydrAte (2CaSo4,H2O). One is Gypsum and the other, supposedly is Plaster of Paris--but untill now I always thought Plaster of Paris and Gypsum were the same thing. Actual chemical properties don't concern me. Practicalities, however, are a different matter. So:
1. Which is better? In particular, which is stronger? (Do either react with iron (such as with steel reinforcing mesh?)
2. I don't see Plaster of Paris taking tile cement very well. Any comments on that?
3. Are these screeds PURE Gypsum and/or Plaster of Paris? I.E., are they only that? Or is the Gypsum/Plaster of Paris merely their main constituent and to which other materials are added to make them more durable and stronger?
Thanks in advance,
Phrixos