Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effects of cement additives on radionuclide mobility
The effects of organic cement additives (totally 7) on the sorption of Eu on cement and TiO2 were measured with variation of the concentration of the additive (0.001 % - 10 % of the water phase) and reaction time (up to 420 d). There was a significant reduction of the sorption of Eu on cement as well as on TiO2 after 24 h of exposure time in the presence of additives at levels that would be obtained in a cement/water system if the total load of the additive in the cement (up to 3 %) would be released into the water phase. Sorption increased with time and would be expected to reach constant levels after 100 d - 200 d. Storage of the additives at 60 deg C and 120 deg C, pH 12.5, for up to 110 d (in order to degrade them) did not lead to significantly altered sorption behaviour.
Effects of cement additives on radionuclide mobility
The effects of organic cement additives (totally 7) on the sorption of Eu on cement and TiO2 were measured with variation of the concentration of the additive (0.001 % - 10 % of the water phase) and reaction time (up to 420 d). There was a significant reduction of the sorption of Eu on cement as well as on TiO2 after 24 h of exposure time in the presence of additives at levels that would be obtained in a cement/water system if the total load of the additive in the cement (up to 3 %) would be released into the water phase. Sorption increased with time and would be expected to reach constant levels after 100 d - 200 d. Storage of the additives at 60 deg C and 120 deg C, pH 12.5, for up to 110 d (in order to degrade them) did not lead to significantly altered sorption behaviour.
Effects of cement additives on radionuclide mobility
Dario, Marten (Autor:in) / Molera, Mireia (Autor:in) / Allard, Bert (Autor:in)
2004
6 Seiten, 3 Bilder, 1 Tabelle, 7 Quellen
Aufsatz (Konferenz)
Englisch
Atommülllagerung , Additiv , Portlandzement , Europiumion , Titandioxid , Sorption , Sorptionsgleichgewicht , Reaktionszeit , Reaktionskinetik , wässriges Medium , Langzeitversuch , Langzeitverhalten , Konzentrationsmessung , Alterungsbeständigkeit , feste Phase , Polymer , Copolymer , Beweglichkeit , radioaktiver Abfall