The geo-cemented stone based on magnesium-ferrous slags of the nonferrous metallurgy - the resistant material for radioactive waste immobilization

The geo-cemented stone on basis of the magnesium-ferrous slag and alkaline silicate solution has been obtained. It has been proved that ferriferous layered hydro alumina silicates (nontronite, limonite) and hydro pomegranates are formed as a result of hardening astringent based on the thin-grinding low slag and alkaline silicates' solution. Presence of water-resistant rock-forming silicate materials provides endurance of the cemented stone. The sorption properties of the synthesized materials from modeling solutions and real technological waste water of one of the Murmansk region enterprises have been studied. The saturated (by radionuclides) geo-cemented stone has been immobilized in the geo-polymeric cement structure. Tests on radionuclide lixiviation from the prepared compounds have been carried out. The lixiviation velocity has been proved to be considerably below normative requirements.