Method of encapsulating waste radioactive material

Details Method of encapsulating waste radioactive material Method of encapsulating waste radioactive material

1981-03-12

1983-04-05

Padgett, Benjamin R.

Compositions

Radioactive compositions

106 97, 106 98, G21F 916

Patent

active

043790810

ABSTRACT:
A method of encapsulating radioactive waste including withdrawing radioactive liquid having a retardant therein from a source. The retardant may including borates, or other additives, which retard the setting of cements by preventing hydration at cement particles in the mix. The liquid is mixed with ordinary Portland cement and subjected to long term shear far in excess of that needed to form ordinary grout. The use of shear to overcome set retardation, and similarly, the deliberate regulation of acceleration of set in hydraulic cement pastes by the utilization of retardants plus shear produces a thixotropic paste with extreme moldability which will not bleed, and finally sets more rapidly than can be expected with normal mixing to form a very strong product.

REFERENCES:
patent: 3429726 (1969-02-01), Takabayashi
patent: 4135940 (1979-01-01), Peltier
patent: 4204876 (1980-05-01), Bowden

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