The Interaction Between Nuclear Waste Glass and Ordinary P ortland Cement
Source abstract
Abstract
The interaction between simulated reference waste glasses SON 68 and SM 539, and cement has been studied in suspensions of ordinary P ortland cement and synthetic cement water with p H 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 A l‐rich SM 539 glass. After consumption of the portlandite, the glass alteration rate is expected to decrease.
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Research context
OpenAlex topics: Graphite, nuclear technology, radiation studies · Nuclear materials and radiation effects · Concrete and Cement Materials Research
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Affiliations
SCK•CEN B‐2400 Mol Belgium
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