EPJ Web of Conferences
Volume 56, 2013International Workshop NUCPERF 2012: Long-Term Performance of Cementitious Barriers and Reinforced Concrete in Nuclear Power Plant and Radioactive Waste Storage and Disposal (RILEM Event TC 226-CNM and EFC Event 351)
|Number of page(s)||10|
|Section||Session 2: Physical, Chemical and Mechanical Behavior: Coupled Chemical and Mechanical Effect|
|Published online||11 July 2013|
Effect of blastfurnace slag addition to Portland cement for cationic exchange resins encapsulation
1 Commissariat à l'Energie Atomique et aux Energies Alternatives, CEA/DEN/MAR/DTCD/SPDE, BP17171, 30207, Bagnols-sur-Cè cedex, France
2 Commissariat à l’Energie Atomique et aux Energies Alternatives, CEA/DEN/ SAC/DPC/SECR, 91192 Gif/Yvette, France
3 ICB, UMR 5209 CNRS Université de Bourgogne, 21078 Dijon, France
4 AREVA NC / BU-Valorisation, 1 place Jean Millier 92084 Paris La Défense, France
a e-mail: firstname.lastname@example.org
In the nuclear industry, cement-based materials are extensively used to encapsulate spent ion exchange resins (IERs) before their final disposal in a repository. It is well known that the cement has to be carefully selected to prevent any deleterious expansion of the solidified waste form, but the reasons for this possible expansion are not clearly established. This work aims at filling the gap. The swelling pressure of IERs is first investigated as a function of ions exchange and ionic strength. It is shown that pressures of a few tenths of MPa can be produced by decreases in the ionic strength of the bulk solution, or by ion exchanges (2Na+ instead of Ca2+, Na+ instead of K+). Then, the chemical evolution of cationic resins initially in the Na+ form is characterized in CEM I (Portland cement) and CEM III (Portland cement + blastfurnace slag) cements at early age and an explanation is proposed for the better stability of CEM III material.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.