RE: Plaster of Paris: From Medicine to Building
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Thank you for this article about plaster that is used in many fields, even in agriculture, it is added to the soil in alkaline lands and saline lands. Allow me to add some informations about this topic, the uses of plaster vary according to its type, as there are two types:
1-Plaster cooked at low temperature:
Obtained by heating gypsum from 150 to 160C, this causes partial dehydration of the gypsum (semi-hydrated gypsum (Ca.SO4.1/2H2O)). It is the construction plaster.
2-Plaster cooked at high temperature:
Obtained from gypsum at T=400-600C, this leads to total dehydration (formation of anhydrous calcium sulphate)
I always enjoy reading your interesting and useful articles, my geetings to you
Thank you for the addition. I didn't want to go too deep into the chemistry, that's why I shelved that part initially.