The Interaction Between Nuclear Waste Glass and Ordinary Portland Cement

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Abstract

The interaction between simulated reference waste glasses SON68 and SM539, and cement has been studied in suspensions of ordinary Portland cement and synthetic cement water with pH 13.5 at 30°C. The cement appears to trigger glass dissolution by consumption of glass matrix components. This leads to fast glass dissolution at a constant rate with formation of a porous gel layer on the glass. A glass dissolution model has been proposed considering that the silicon coming from the glass reacts with portlandite to form C-S-H phases. The transformation of C-S-H into C-A-S-H phases is a second parallel driving force especially for the Al-rich SM539 glass. After consumption of the portlandite, the glass alteration rate is expected to decrease.

Details

Original languageEnglish
Pages (from-to)328-340
JournalInternational Journal of Applied Glass Science
Volume4
Issue number4
DOIs
Publication statusPublished - Dec 2013

Keywords

  • Vitrified High Level Waste, Supercontainer Design, Ordinary Portland Cement, SFC-1, glass dissolution rates, high pH

ID: 324237