Self-setting compositions are formed by bringing into admixture an organic polyisocyanate, a non-ionic surface active agent devoid of isocyanate-reactive groups, an alkaline filler and water. Preferred alkaline fillers are portland cement, calcium oxide and hydrated lime. A plasticiser is preferably incorporated in the composition. Waste material, for example liquid or particulate radioactive wastes may be formed into a self-setting composition for consolidation and disposal. A particulate extender may be incorporated in the self-setting composition to give a product useful for example as a floor screed or cavity filler.
将有机多
异氰酸酯、不含
异氰酸酯反应基团的非离子表面活性剂、碱性填料和
水混合在一起,就形成了自凝固组合物。首选的碱性填料是
硅酸盐
水泥、
氧化钙和
熟石灰。组合物中最好加入
增塑剂。废料,例如液态或颗粒状放射性废料,可制成自凝组合物,用于加固和处置。可在自凝组合物中加入微粒扩展剂,以获得可用作地板平层或空腔填充物等的产品。