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    Using Mixture Experiments to Develop Cementitious Waste Forms


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    Mixture experiments are presented as a means to develop cementitious waste forms. The steps of a mixture experiment are (1) identifying the waste form ingredients; (2) determining the compositional constraints of these ingredients; (3) determining the extreme vertices, edge midpoints, and face centroids of the constrained multidimensional volume (these points along with some interior points represent the set of possible compositions for testing); (4) picking a subset of these points for the experimental design; (5) measuring the properties of the selected subset; and (6) generating the response surface models. The models provide a means for predicting the properties within the constrained region. This article presents an example of this process for one property: unconfined compressive strength.


    mixture experiment, solidification/stabilization, waste form, cement, fly ash, attapulgite clay, air-cooled blast furnace slag, low-level radioactive waste, unconfined compressive strength

    Author Information:

    Spence, RD
    Oak Ridge National Laboratory, managed by Martin Marietta Energy Systems, Inc.,

    Anderson, CM
    Pacific Northwest Laboratory,

    Piepel, GF
    Pacific Northwest Laboratory,

    Committee/Subcommittee: D34.01

    DOI: 10.1520/STP14118S