Hazardous or toxic waste destruction or containment – Destruction or containment of radioactive waste – By fixation in stable solid media
Patent
1994-06-03
1995-05-09
Mai, Ngoclan T.
Hazardous or toxic waste destruction or containment
Destruction or containment of radioactive waste
By fixation in stable solid media
588 6, 588 8, 588255, 264 05, 252625, 976DIG385, 427 6, G21F 900
Patent
active
054141974
ABSTRACT:
A method of containing hazardous and toxic wastes includes the steps of irporating the dried waste, in a salt form, in melted polymer, such as asphalt, and forming the waste salt and asphalt blend into aggregate pellets. The pellets are coated with a powdered coating material that is compatible with a portland cement-based mortar or other cementitious material which is used. The coated particles are mixed with mortar to form a polymer-aggregate concrete and cast into wasteforms for storage or burial. If it is desirable to produce a waste form with a continuous layer of mortar on the exterior of the concrete monolith the mold can be placed on a turntable and spun, or otherwise exposed to a centrifugal force to force the mortar to the outside of the mold. Centrifugal separation is possible because the polymer-waste mixture typically has a specific gravity near 1.5 while that of the cementitious mixture is typically greater than 2.0.
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CA 104:173971.
Brabston William N.
Malone Philip G.
Sykes Melvin C.
Tom Judy C.
Wakeley Lillian D.
Mai Ngoclan T.
Marsh Luther A.
The United States of America as represented by the Secretary of
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