Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Geopolymers as candidates for the immobilisation of low- and intermediate-level waste
Geopolymers should be serious waste form candidates for ILW (intermediate level waste), insofar as they are more durable than Portland cement and can pass the PCT-B test for high-level waste. Thus an alkaline ILW could be considered to be satisfactorily immobilised in a geopolymer formulation. However a simulated Hanford tank waste was found to fail the PCT-B criterion even for a waste loading as low as 5 weight-%, very probably due to the formation of a soluble sodium phosphate compound(s). This suggests that it could be worth developing a 'mixed' GP waste form in which the amorphous material can immobilise cations and a zeolitic component to immobilise anions. The PCT-B test is demonstrably subject to significant saturation effects, especially for relatively soluble waste forms.
Geopolymers as candidates for the immobilisation of low- and intermediate-level waste
Geopolymers should be serious waste form candidates for ILW (intermediate level waste), insofar as they are more durable than Portland cement and can pass the PCT-B test for high-level waste. Thus an alkaline ILW could be considered to be satisfactorily immobilised in a geopolymer formulation. However a simulated Hanford tank waste was found to fail the PCT-B criterion even for a waste loading as low as 5 weight-%, very probably due to the formation of a soluble sodium phosphate compound(s). This suggests that it could be worth developing a 'mixed' GP waste form in which the amorphous material can immobilise cations and a zeolitic component to immobilise anions. The PCT-B test is demonstrably subject to significant saturation effects, especially for relatively soluble waste forms.
Geopolymers as candidates for the immobilisation of low- and intermediate-level waste
Geopolymere als Werkstoffe für die Immobilisierung von schwach- und mittelradioaktivem Abfall
Perera, Dan (Autor:in) / Vance, Eric (Autor:in) / Kiyama, Satoshi (Autor:in) / Aly, Zaynab (Autor:in) / Yee, Patrick (Autor:in)
2007
6 Seiten, 1 Bild, 4 Tabellen, 14 Quellen
Aufsatz (Konferenz)
Englisch
mittelradioaktiver Abfall , Atommülllagerung , schwach radioaktiver Abfall , Geopolymer , Immobilisation , anorganisches Bindemittel , Flugasche , Metakaolin , Auslaugen (Mineralogie) , Natriumsilicatbinder , Natriumsilicat , nukleare Entsorgung , radioaktiver Abfall , chemische Stabilisierung , chemische Beständigkeit , Diffusionskoeffizient
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