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Characterisation of concrete, mortar and calcium silicate hydrated phases (CSH) and thorium retention analyses by ion beam techniques.

Published online by Cambridge University Press:  27 March 2012

Ursula Alonso ,
Tiziana Missana ,
Miguel Garcia-Gutierrez ,
Henar Rojo ,
Alessandro Patelli ,
Valentino Rigato  and
Daniele Ceccato
Ursula Alonso
Affiliation:
CIEMAT, Avda. Complutense 40, Madrid 28040, SPAIN
Tiziana Missana
Affiliation:
CIEMAT, Avda. Complutense 40, Madrid 28040, SPAIN
Miguel Garcia-Gutierrez
Affiliation:
CIEMAT, Avda. Complutense 40, Madrid 28040, SPAIN
Henar Rojo
Affiliation:
CIEMAT, Avda. Complutense 40, Madrid 28040, SPAIN
Alessandro Patelli
Affiliation:
CIVEN, Via delle Industrie 5, Venezia-Marghera 30175, ITALY
Valentino Rigato
Affiliation:
LNL-INFN, Viale dell’ Università 2, Legnaro-Padova 35020, ITALY
Daniele Ceccato
Affiliation:
LNL-INFN, Viale dell’ Università 2, Legnaro-Padova 35020, ITALY
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Abstract

Cement-based materials, like concrete and mortar, are widely used in radioactive waste repositories. A deep characterization of these heterogeneous materials, and of their main phases, is necessary to evaluate their capability of retaining critical radionuclides (RN).

In this study, the ion beam technique micro- Particle Induced X- Ray Emission (μPIXE) is used to characterize the concrete and mortar used in the Spanish low level waste repository. Two calcium silicate hydrate (CSH) phases with different Ca/Si ratio are also studied, because they are known to be amongst the most relevant phases, formed upon cement hydration, that retain RN. The retention of thorium on the above mention materials, as relevant tetravalent actinide, is also analyzed. Results are compared with Scanning Electron Microscopy- Energy Dispersive X-Ray Spectroscopy (SEM-EDX) analyses.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1475: Symposium NW – Scientific Basis for Nuclear Waste Management XXXV , 2012 , imrc11-1475-nw35-p52
Copyright
Copyright © Materials Research Society 2012

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References

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