Immobilisation of active concrete debris using soluble sodium silicates
This feasibility study investigates the process of setting a slurry comprised of active concrete demolition debris and sodium silicate solution. The process would be used on the finer size fraction of the products of demolition of active concrete in a shield or from a prestressed concrete reactor vessel. The debris could be converted by the process to a void-free solid suitable for emplacing in a repository. A literature survey has indicated that there is no detailed understanding of the silicate/hardened concrete interaction, although the effect is used empirically in civil engineering applications. Also, although the general characteristics of concrete demolition debris are known, there is only limited understanding of the physical and chemical properties of the products. The experimental study (at laboratory scale) selected the optimum grade of sodium silicate and also determined the optimum proportions of a silicate-debris slurry. An outline design for the on-site plant needed for the process has been prepared and costed.
Bibliographic Reference: EUR 13019 EN (1990) 49 pp., MF, ECU 4
Record Number: 199011541 / Last updated on: 1994-12-02
Original language: en
Available languages: en