Technical Report NTB 89-07

The objective of the Sealing Project is to find new ways of sealing finely fractured rock by grouting. This requires development of new injection techniques as weIl as identification of materials which are sufficiently fluid to be groutable, have an acceptably low permeability and are physically and chemically stable. The present report describes the results of the first two years of investigations (Stage 1) which gave very positive results, as can be concluded from the large-scale field test.