STUDY ON SOLIDIFICATION OF INTERMEDIATE LEVEL RADIOACTIVE WASTE IN LARGE POURED ALKALI-ACTIVATED SLAG CEMENT
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Published:2003
J Zhou, S Yan, 2003. "STUDY ON SOLIDIFICATION OF INTERMEDIATE LEVEL RADIOACTIVE WASTE IN LARGE POURED ALKALI-ACTIVATED SLAG CEMENT", Role of Cement Science in Sustainable Development: Proceedings of the International Symposium held at the University of Dundee, Scotland, UK on 3–4 September 2003, Ravindra K. Dhir, Moray D. Newlands, Laszlo J. Csetenyi
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Non α low and intermediate level radioactive waste was solidified in large volume poured alkali-activated slag cement with 80% zeolite and 20% slag in the whole of the waste-solidified material. The solidified form with its load of 13.5% nitrate and water to solid ratio of 0.34 not only possesses excellent liquidity but has 10.3 MPa of compressive strength. In deionized water, the leaching rates of Cs+, Sr2+ in 28 days reached 3.1 X 10-4 and 2.2X 10-5 g • cm-2 • d-1 at 90°C or 5.6X104 and 3.0X10-5 g • cm-2 • d-1 at 150°C (MCC-1P), and the leaching percentages were 0.11%, 3.5% and 0.2% or 6.2% and 0.3% respectively. They were not significantly changed in salt solution. It shows that this kind of solidified form has strong ability to retain Cs+, Sr2+ and its other properties also makes it suitable for large volume poured cement.
INTRODUCTION
MATERIALS AND MOLDING, CURING METHODS
RESULTS AND DISCUSSIONS
CONCLUSIONS
REFERENCES
