Servizio Comunitario di Informazione in materia di Ricerca e Sviluppo - CORDIS

Riassunto

A BIBLIOGRAPHICAL RESEARCH ON THE PROBLEM OF THE BACKFILLING AND SEALING OF BOREHOLES, SHAFTS AND TUNNELS FOR RADIOACTIVE WASTE DISPOSAL HAS BEEN CARRIED OUT. VARIOUS MATERIALS - BOTH NATURAL AND ARTIFICIAL - LIKE CLAY, INDUSTRIAL CEMENT, POLYMER CONCRETE, GEOTHERMICAL AND MAGNESIUM CEMENT HAVE BEEN EXAMINED. THEIR MAIN PHYSICO-CHEMICAL AND DURABILITY CHARACTERISTICS HAVE BEEN EXAMINED. THE PROBLEM OF THE INTERACTION BETWEEN THE SEALING AND THE GEOLOGICAL ENVIRONMENT HAS ALSO BEEN COVERED. THE FINAL SUBJECT DISCUSSED IS THE DAMAGE CAUSED TO THE HOST FORMATION BY THE EXCAVATION OF SHAFTS AND TUNNELS. THE LABORATORY TESTS HAVE BEEN PERFORMED ON A NATURAL CLAY AND OTHER TYPES OF MATERIAL (CEMENT GROUT, CEMENT GROUT WITH EXPANSIVE ADDITIVE, CEMENT MORTAR AND REMOULDED CLAY) WHICH HAVE BEEN USED AS PLUG MATERIALS. THE MAIN CONCLUSIONS OBTAINED FROM THE TESTS ARE THE FOLLOWING THE PERMEABILITY OF THE CEMENT IS LOWER THAN THE PERMEABILITY OF THE CLAY; WHEN CURING TOOK PLACE UNDER LOAD, GOOD ADHESION WAS OBSERVED BETWEEN THE CLAY AND THE CEMENT MORTAR; - THE FLOW OF WATER IN A SPECIMEN CONSISTING OF A CLAY CORE SURROUNDED BY REMOULDED CLAY IS LARGER THAN IN THE NATURAL CLAY.

Informazioni supplementari

Autori: CSN CSN, ROMA, CSN, ROMA
Riferimenti bibliografici: EUR 11187 IT (1987) MF, PP 113, ECU 8.00, BLOW-UP COPY, ECU 15.00, AVAILABILITY: EUROFFICE, LUXEMBOURG, BP 1003, GDL
Disponibilità: Can be ordered online
Numero di registrazione: 1989126221800 / Ultimo aggiornamento: 1989-04-01
Categoria: publication
Lingue disponibili: it