Long-term rheological and transport properties of dry and wet salt rocks
This report considers the theoretical background necessary for a state-of-the-art treatment of compaction creep in granular salt and backfill materials. Experimental work on compaction creep in wet and dry salt aggregates is presented, which is extended to investigate the influence of backfill variables (such as brine content, grain-size distribution, and additives content) on the compaction creep behaviour of granular salt, and to develop a generally applicable constitutive law for salt backfill and cement materials. An optimal backfill recipe is proposed. Experiments designed to test the applicability of the general constitutive law to this recipe, to determine its permeability versus porosity characteristics, and to clarify the very long-term properties and microstructure of both backfill and cement are reported. Work done on the long-term constitutive behaviour of salt rock and on creep-induced dilatancy is outlined. Investigations into the permeability characteristics of dilated salt and (fractured) anhydrite rock are reported.
Bibliographic Reference: EUR 11848 EN (1988) FS, 161 pp., ECU 13.75
ISBN: ISBN 92-825-9191-3;CD-NA-
Record Number: 198910385 / Last updated on: 1994-12-01
Original language: en
Available languages: en