ADDITIVES FOR Cr (VI) REDUCTION IN CEMENT, SLAGS, MORTARS, CONCRETE, WASTE WATER AND MINING INDUSTRY WASTE

摘要

The invention provides a Cr (VI) or Cr6+ reduction and/or immobilization additive compositions for use in cement, cement based products, and in slags which composition includes one or more chemical compounds containing the element N in the form of simple or complex anions and/or metallic Zn powder, Zn salts, and/or Zn compounds.