Reaction Products in Magnesium Oxychloride Cement Pastes. System MgO‐MgCl2‐H2O

The calcining temperature of the basic magnesium carbonate influences both the reactivity of the resultant MgO and the reaction products in the system MgO‐MgCl 2 ‐H 2 O. The reaction products identified by X‐ray diffraction are: Mg 3 (OH) 3 Cl·4H 2 O (phase 5), Mg 2 (OH) 3 Cl·4H 2 O (phase 3) and Mg(OH) 2 . The present paper discusses the relationship between the properties of MgO and the observed reaction products.