Caesium immobilisation in hydrated calcium-silicate-aluminate systems

S. Bagosi; L. J. Csetényi

doi:10.1016/S0008-8846(98)00163-X

Caesium immobilisation in hydrated calcium-silicate-aluminate systems

S. Bagosi
, L. J. Csetényi

Research output: Contribution to journal › Article › peer-review

39 Citations (Scopus)

Abstract

A special field of application of cementitious materials is using cements for immobilisation of low and medium level radioactive wastes. Clarification of mechanisms of binding is complicated by the multicomponent nature of the solidifying matrix. In the present work, interest is turned to one of the most difficult to confine, long half-life isotopes, the caesium isotope. The cement matrix for solidification of the radioactive waste can be considered, with simplification, as a CaO-SiO₂-Al₂O₃-H₂O system. The various compositions of hydrated cementitious assemblages were investigated with respect to their Cs sorption by measuring the Cs distribution ratios (R_d,) therein. Trends in sorption properties were detected, and the section of theternary phase diagram with the best performance was identified.

Original language	English
Pages (from-to)	1753-1759
Number of pages	7
Journal	Cement and Concrete Research
Volume	28
Issue number	12
DOIs	https://doi.org/10.1016/S0008-8846(98)00163-X
Publication status	Published - 30 Dec 1998

ASJC Scopus subject areas

Building and Construction
General Materials Science

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abstract = "A special field of application of cementitious materials is using cements for immobilisation of low and medium level radioactive wastes. Clarification of mechanisms of binding is complicated by the multicomponent nature of the solidifying matrix. In the present work, interest is turned to one of the most difficult to confine, long half-life isotopes, the caesium isotope. The cement matrix for solidification of the radioactive waste can be considered, with simplification, as a CaO-SiO2-Al2O3-H2O system. The various compositions of hydrated cementitious assemblages were investigated with respect to their Cs sorption by measuring the Cs distribution ratios (Rd,) therein. Trends in sorption properties were detected, and the section of theternary phase diagram with the best performance was identified.",

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Caesium immobilisation in hydrated calcium-silicate-aluminate systems

Abstract

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