Abstract: A method of solidifying noxious wastes contaminated with toxic substances possibly affecting an environmental ecological system, using a cement-type solidifying agent and lipid added and admixed into the noxious wastes, to cause solidification thereof and at the same time fixation of the toxic contaminants, both organic and inorganic, as contained therein.

Abstract: 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.

Abstract: Consolidation construction for soft, unstable foundation for improving the bearing strength in order to fill earth thereon as in land reclaiming or to build structural construction thereon including dikes and roads. Examples of such unstable foundation requiring consolidation are: sea bottom with soft unsolid sedimentation heap as often referred to recently in Japan as HEDORO, muddy swamp land, layer of slimy industrial waste sludge of much water content and the like. Consolidation is effected on the spot by admixing hardening agent, such for instance as cement, with the slimy mud heap constituting the soft, unstable foundation.