Critical Review of Cement-Based Stabilisation/Solidification Techniques for the Disposal of Hazardous Wastes.
- 1 December 1986
- report
- Published by Defense Technical Information Center (DTIC)
Abstract
The materials used in stabilisation/solidification processes (OPC, PFA and sodium silicate) have been reviewed in terms of their basic composition and chemistry. The addition of inorganic wastes to OPC and PFA has been demonstrated to affect early hydration and has led to the development of the protective coating theory and sorption of heavy metals by PFA as the principal factors involved in stabilization. The aqueous chemistry of OPF, PFA, PFA/OPC and PFA/OPC/SILICATES has also been reviewed and has illustrated the chemical reactions taking place during the first hour of the stabilisation process. Methods to improve the efficiency of the Sealosafe processed have been highlighted particularly with respect to supernatant formation. New developments such as the use of clays have been highlighted.Keywords
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