Method and composition, including particular additive for hydraulic cement, for fixing waste matter

摘要

Solidification or consolidation, for fixation of various kinds of waste matter, soil etc. containing toxic contaminants affecting ecological system of the environment, by use of composition made up of hydraulic cement and particular additive. The additive essentially contains at least one sulfate, such as aluminum sulfate, alum or iron sulfate, and at least one alkaline metal salt, such as carbonate, bicarbonate or silicate.