ZHAO Yan-hong, PAN She-qi, LI Chang-cheng, ZHANG Hong-tao. Leaching Experiment of Alkali-Activated Cementitious Materials Solidified Forms of Radioactive Incineration Ash[J]. Journal of Nuclear and Radiochemistry, 2010, 32(5): 268-273.
    Citation: ZHAO Yan-hong, PAN She-qi, LI Chang-cheng, ZHANG Hong-tao. Leaching Experiment of Alkali-Activated Cementitious Materials Solidified Forms of Radioactive Incineration Ash[J]. Journal of Nuclear and Radiochemistry, 2010, 32(5): 268-273.

    Leaching Experiment of Alkali-Activated Cementitious Materials Solidified Forms of Radioactive Incineration Ash

    • In order to solidify safely radioactive incineration ash, the alkali-activated cementitious materials were prepared with slag, fly ash,cement and zeolite, with water glass or sodium silicate (sulfate) as the activator. The recommended formulation of solidification matrix is 65%(mass fraction, the same below) slag, 10% fly ash, 20% zeolite, 2% cement, 3% Ca(OH)2. Adding quantity of water glass is 5%,when addition of 30% radioactive incineration ash, with 0.34~0.35 of the ratio of water and ash,the mechanical property of solidification forms performs well. The leaching rate of U for the cement wastes forms is 6.0×10-6 cm/d in 35 d, and the long time leaching rate is very low. The results of diffusion coefficient of U in the solidification forms indicate that the retention capability about U of alkali-activated cementitious materials is good. The leaching mechanisms of solidification forms are discussed.
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