（1 Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, 2 Laboratory of Environmental technology, Institute of Nuclear and New Energy Technology, Tsinghua University
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DOI:
10.7502/j.issn.1674-3962.2016.07.05
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Abstract:
Cementation is one of the commonly used techniques for radioactive wastes treatment. In the process of radioactive waste cementation, mineral admixtures have significantly positive effects on operational property, mechanical property and nuclides leaching ability. In this paper, the properties of active and non-active mineral admixtures, the application of mineral admixtures in radioactive resins cementation and the effects on waste-forms properties were reviewed. The morpha effect, pozzolanic activity, micro aggregate effect of activemineral admixtures and filling effect of non-active mineral admixtures enhanced the properties of cement-solidified waste-forms, which involves lower hydration heat during cement solidification, higher compressive strength, crack resistance and durability, and reduced nuclides leaching ability. Different admixtures and blending amounts affected cementation tremendously; therefore, formula experiments were crucial to obtain appropriate blending amounts and to guarantee enhanced mechanical properties and durability of cement-solidified waste-forms.