PERFORMANCE OF CONCRETE BACKFILLING MATERIALS FOR SHAFTS AND TUNNELS IN ROCK FORMATIONS
This report (Part 2) describes the mathematical modelling studies carried out within a research project into the performance of concrete backfilling materials for shafts and tunnels comprising a hard rock geological disposal repository for High Level, Heat Generating Wastes (HLW/HGW) or Intermediate Level Wastes (ILW) with long lived isotopes. A complementary volume (Part 1) describes laboratory research studies into the development, manufacture and testing of a preplaced aggregate concrete (PAC) alternative to conventional concrete. The ongoing objective, to which this research programme contributes, is to demonstrate that concrete will serve as a beneficial engineered barrier, part of a multi-barrier system, in isolating potentially harmful radionuclides from the biosphere. The report recognises that the backfill cannot be considered in isolation and that there are many interactions between the primary repository elements of host rock, waste and backfill. The interactions considered include mechanical, thermal, creep and moisture movement. Analyses were carried out using the ADINA finite element system, by programmed analytical formulae and using the TEMPOR program (for thermally driven moisture migration in concrete). The emphasis has been directed at establishing basic mathematical approaches to the understanding and quantification of the phenomena involved and applying them to simplified and idealized repository scenarios. The methods devised lay foundations for future work on more defined disposal scenarios.
Bibliographic Reference: EUR 10383 EN (1986) MF, VOLUME 2, 114 P., BFR 300, BLOW-UP COPY BFR 575, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989124106800 / Last updated on: 1987-01-01
Available languages: en