Explanatory notes
… Portland cement and white Portland cement. The heading also covers aluminous cement, slag cement, supersulphate cement … pozzolana cement, Roman cement, etc., and mixtures of the above‑mentioned cements. The cements of this heading may be … (Fe 2 O 3 ) and; ‑ that the term “calcium sulphate” covers gypsum and its derivatives and anhydrite and other …