Characterization of clay (bentonite)/crushed granite mixtures to build barriers against the migration of radionuclides: diffusion studies and physical properties
In Spain, the possibility of storing radioactive waste in granitic rocks, using Spanish clays as backfill and sealing materials, is being considered. With the aim of minimising the chemical-mineralogical disequilibrium between the granitic rock and the artificial barrier, the possibility of using molten granite as an additive and illite as clayish material has been studied, instead of the normal use of smectite (montmorillonite). The studies have been carried out on 30 commercial Spanish clays and two kinds of granite. They have concentrated on the selection of materials and the optimisation of the clay-granite mixtures, chemical characterisation, mechanics and physics of the mixtures and compacted blocks, determination of their behaviour in the gradient fields of temperature, pressure and chemical potentials and the determination of the migration parameters.
Bibliographic Reference: EUR 13666 EN (1991) 136 pp., FS, ECU 11.25
ISBN: ISBN 92-826-3066-8
Record Number: 199111563 / Last updated on: 1994-12-02
Original language: en
Available languages: en