Abstract
It has been found that calcium and sulphur are leached by alkaline or neutral aqueous media from sulphur-infiltrated concrete. From chemical examinations and Raman spectroscopy it has been shown that sulphur in the leachate is present as polysulphide anions. It is postulated that homonuclear polymeric anions of sulphur are formed in the presence of moisture when molten sulphur infiltrates concrete. The soluble calcium polysulphides so formed can then be leached by water.
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