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Keywords: impermeability
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Proceedings Papers

Paper presented at the ISRM International Symposium - Rockstore 80, June 23–27, 1980
Paper Number: ISRM-Rockstore-1980-057
... would require a strict control of temperature which would be difficult to assure under the rough working conditions of a tunnel. Checking impermeability is done with extreme care, by means of an electric brush similar to those used to probe pipeline coatings. The plastic sheeting is an excellent...

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