Stabilization/Solidification Options

Economical and Reliable

Wilson can perform a bench-scale stabilization analysis on bulk waste samples to identify optimum stabilization materials and mixtures. These tests are conducted to determine the most economical mix which meets the technical requirements for closure-in-place of the sludges.

The goal of this phase is to determine the most economical mix which will meet the established strength and chemical fixation requirements. These mix series typically include Portland cement, fly ash, and cement and/or lime kiln dust (or other locally available, natural calcined pozzolans). Whenever possible, Wilson identifies local sources for all stabilizing agents.

Samples are prepared in varying proportions to the waste based upon an order-of-magnitude cost evaluation of the mixing proportions of the stabilization agents and Wilson’s experience with similar wastes. Strength and leachability tests are performed on the sample of each mix series which most closely meets the strength specification to determine where additional modification will be required to meet leachability requirements. The results of this evaluation provide:

  • a good indication of whether stabilization is an economical alternative; and
  • the mix proportions and procedures required to meet the project objectives.