Magnesia cement mixture

摘要

A magnesia cement mixture containing calcined (burnt) magnesite (magnesium oxide) and pulverulent pozzuolana (pozzolana) or silica (siliceous earth) or water glass, contains as further additive either water-soluble phosphates or oxalic acid or citric acid or mixtures of these materials. The mortar then formed is water-resistant and does not tend to form expansion cracks.