Gas-Permeable Seal Test - Construction of Concrete Plug

The last step of the emplacement work done in the Gas-Permeable Seal Test (GAST) was the construction of the concrete bulkhead which is designed to withold the 50 bars water pressure generated by the water injected into the sand/bentonite plug.

Gast experiment, grimsel : concrete plug construction
Closing of experiment

Gast experiment, grimsel :
Concrete mixing

Gast experiment, grimsel :
Concrete injection

Gast experiment, grimsel :
Concrete injection

Gast experiment, grimsel :
Final plug

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.