Gas-Permeable Seal Test - Emplacement of Sand/Bentonite seal

The pre-mixed sand/bentonite material for the GAST (Gas-Permeable Seal Test) experiment at the Grimsel Test Site is emplaced and compacted with different methods to ensure correct emplacement around the fragile instrument assemblies. (photos Comet)

Gast experiment,Grimsel : Emplacement of sand/bentonite material
Emplacement of pre-mixed S/B material

Gast experiment,Grimsel : Emplacement of sand/bentonite material
Distribution of S/B material

Gast experiment,Grimsel : Emplacement of sand/bentonite material
Compaction with Wacker hammer

Gast experiment,Grimsel : Emplacement of sand/bentonite material
Compaction with vibration plate

Gas-Permeable Seal Test (GAST)

The GTS underground facilities are also available to interested 3rd parties for underground testing and research. The GTS offers cost-effective access to a fully developed, well characterised underground research facility with round the year logistical support - please contact Dr. Ingo Blechschmidt, Head of the Grimsel Test Site, for further details.