| 摘要 |
The present invention provides methods for resisting corrosion of metal elements in concrete, and associated compounds and structures. Acid mine drainage sludge is used as a source of a precursor compound that reacts with a source of anion to form a chloride-sequestering compound. The precursor compound may have the formula <?in-line-formulae description="In-line Formulae" end="lead"?>2Me'(II)O.(Y<SUB>(2-x)</SUB>,Y'<SUB>x</SUB>)O<SUB>3</SUB>+qMe'(II)O, <?in-line-formulae description="In-line Formulae" end="tail"?> where at least one of Y and Y' is present; Y and Y' are different and are independently selected from the group consisting of Al, Fe, Cr, and not present; Me' is a cation and is selected from the group consisting of Ca, Ba, Sr, Mn, and Zn; x is a number ranging from 0 to 2; and q is a number ranging from 0 to 2; and combinations thereof. In a preferred embodiment, the precursor compound has the formula 2CaO(Fe<SUB>(2-x)</SUB>,Al<SUB>x</SUB>)O<SUB>3</SUB>+CaO.
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