SEDL / STP / STP1240-EB / STP14118S

Using Mixture Experiments to Develop Cementitious Waste Forms

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

Anderson, CM
Pacific Northwest Laboratory,

Piepel, GF
Pacific Northwest Laboratory,

Pages: 21    Published: Jan 1996

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Abstract

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.