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The main objective of the project was to prove the long-term sealing capability of an entire dam construction. The long-term seal (responsible for the long-term safety of a dam construction) was subjected to an in situ test in order to provide proof of the tightness and to predict the long-time tighness via model calculations. The technical components of the test constructions in the Asse salt mine were designed and the test field was prepared. The devices to perform pressurization tests were designed and fabricated as well as the instrumetation for the in situ measurements. The permeability of the host rock surrounding the test field has been investigated by well pressure tests. The material behaviour of salt briquettes and mortar, the main components of the long-term seal, was investigated in laboratory experiments. This included mineralogical and chemical investigations. Due to the mechanical consistency of the salt briquettes a planned in situ experiment in the Amélie mine was stopped. In order to predict the long-term behaviour the multiphase flow code Bright was developed and verified. The results are presented and discussed in this report.

Additional information

Authors: BOLLINGERFEHR W (EDITOR), Deutsche Gesellschaft zum Bau und Betrieb von Endlagern für Abfallstoffe mbH (DBE), Peirie (DE)
Bibliographic Reference: EUR 16856 EN (1996) 398pp., FS, ECU 46.50
Availability: Available from the (2)
ISBN: ISBN 92-827-6621-7
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