Phenomenological description of the effect of glass dissolution on cement paste evolution in an integrated glass dissolution experiment

Jules Goethals, Karine Ferrand, Régine Mosser-Ruck, Julien Bonnet, Karine David, Sanheng Liu, Jérôme Sterpenich, Abdesselam Abdelouas, Yann Morizet, Karel Lemmens

Research outputpeer-review

Abstract

The interaction between nuclear glass surrogate and ordinary Portland cement (OPC) was investigated through integrated static leach tests conducted at ambient temperature. Tests were performed in stainless-steel cells in which OPC hydrated cement pastes were separated from glass powders by a stainless-steel filter. This article gives a phenomenological description of the processes affecting the hydrated cement paste arising from glass dissolution. The results show that the ingress of Si from glass dissolution leads to the degradation of the cement paste over a distance of 100–200 μm within 900 days of interaction. The Hardened Cement Paste (HCP) is affected by two main processes, which are the pozzolanic reaction and the alkali-silica reaction (ASR). These processes lead to porosity changes of HCP in contact with the stainless-steel filter and significant changes in the diffusive properties of the HCP. Especially, the effect of such processes on boron and lithium retention was studied and showed that precipitation of ASR-like gel and low Ca/Si C–S–H (Calcium Silicate Hydrate) highly retain these two elements. In the presence of an Al-rich glass (SM539), ASR is unlikely due to the preferential formation of C-A-S-H (Calcium Aluminium Silicate Hydrate).

Original languageEnglish
Article number106012
Number of pages15
JournalApplied Geochemistry
Volume168
DOIs
StatePublished - Jul 2024

Funding

Research funding by the ACED/EURAD H2020 program under grant agreement No 847593 are gratefully acknowledged. We thank Yann Bortoli for his precious help in the dismantling of the cells and Nicolas Stephant for his assist with SEM-EDX analyses. This research was funded by the EURAD programme (European Joint Programme on Radioactive Waste Management of the European Union, grant N\u00B0 847593) and done within the workpackage ACED (Assessment of Chemical Evolution of ILW and HLW Disposal Cells). We thank Yann Bortoli for his precious help in the dismantling of the cells and Nicolas Stephant for his assist with SEM-EDX analyses. We also thank the two anonymous reviewers and Thomas Gimmi for their constructive comments and corrections of the manuscript.

FundersFunder number
Horizon Europe
EC - European Commission847593

    ASJC Scopus subject areas

    • Environmental Chemistry
    • Pollution
    • Geochemistry and Petrology

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