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Calcium silicate hydrate (C-S-H), calcium aluminosilicate hydrate (C-A-S-H) and sodium aluminosilicate hydrate (N-A-S-H) are a main alkali-activated hydration products of calcium aluminosilicate glasses.The C-S-H,C-A-S-H and N-A-S-H phases have a very different chemical composition and very different structures.These phases are materials which have ability to toxic ions immobilization.Immobilization mechanisms for calcium silicate hydrate, calcium aluminosilicate hydrate and sodium aluminosilicate hydrate include sorption, phase mixing, substitution and precipitation of insoluble compounds.