Development of magnesium-silicate-hydrate mortars using magnesium hydroxide for Magnox waste encapsulation
File(s)
Published version
Author(s)
Baxter Chinery, M
Wong, HS
Wenman, MR
Cheeseman, CR
Vandeperre, LJ
Type
Journal Article
Abstract
A novel approach to reduce the volume of the UK legacy Magnox waste is to use the Mg(OH)2-rich sludge as a component in a magnesium-silicate-hydrate (M-S-H) mortar. This study looks at the potential to incorporate a simulant corroded magnesium sludge (CMgS) into a mortar that achieves the encapsulation criterion. The optimum M-S-H mortar has a binder molar ratio of 0.5, resulting in 46.6 wt% of the mortar being CMgS sludge. This mortar had compressive strengths of 25 MPa at 60 days with a connected porosity of 6.5 % at 6 months, and this meets the requirements for a waste encapsulated grout. The work demonstrates the potential to use a Mg(OH)2-rich sludge, obtained from Magnox Swarf Storage Silos as a raw material in M-S-H mortars in waste encapsulation, with associated cost and space savings.
Date Issued
2025-05-01
Date Acceptance
2025-03-17
Citation
Journal of Nuclear Materials, 2025, 610
ISSN
0022-3115
Publisher
Elsevier
Journal / Book Title
Journal of Nuclear Materials
Volume
610
Copyright Statement
© 2025 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
License URL
Identifier
10.1016/j.jnucmat.2025.155767
Publication Status
Published
Article Number
155767
Date Publish Online
2025-03-25