The Saltstone Production Facility mixes salt solution from Tank 50H with premix of 10% cement, 45% fly ash, and 45% slag to produce fresh (uncured) saltstone that is transferred to the Saltstone Disposal Facility vaults. The saltstone formulation (mix design) must produce a grout waste form that meets both placement and performance properties. In previous simulated saltstone studies, multiple compositional factors were identified that drive the performance properties of saltstone made from the projected Actinide Removal Process/Modular Caustic Side Solvent Extraction Unit (ARP/MCU) decontaminated salt solution (DSS). This salt solution composition was chosen for this study since it is the primary feed into Tank 50H. The primary performance property investigated was hydraulic conductivity since it is a variable input property to the Saltstone Performance Assessment (PA). In addition, the porosity, also referred to as void structure, is another variable that impacts the PA response. In addition, Young's modulus and cured density are other performance properties analyzed in this report that are direct inputs into the PA.
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