ABSTRACT
Magnesium oxychloride cement, also called Sorel cement, is obtained by mixing powdered magnesium oxide (calcined magnesia, MgO) with a concentrated solution of magnesium chloride (MgCl2).
The calcined magnesia is produced by calcination of magnesite (MgCO3) at temperatures of around 750 °C. The conditions of calcination affect the reactivity of the formed MgO, and this in turn influences both the reaction rate and the properties of the reaction product. Underburning produces an excessively reactive product, whereas everburning results in an insufficient reactivity and excessively long setting times of the mix.
