Injection d'ancrages à base de ciment Portland dans l'arctique
During summer, it is possible to inject Portland cement grout in the Arctic because there is a layer of unfrozen rock surface which is approximately 2 m deep. During the month of August, the temperature of the unfrozen rock layer reaches +5 °C at a depth of 1 m, which allows the Portland cement to h...
| Published in: | Canadian Journal of Civil Engineering |
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| Main Authors: | , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Canadian Science Publishing
1987
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1139/l87-099 http://www.nrcresearchpress.com/doi/pdf/10.1139/l87-099 |
| Summary: | During summer, it is possible to inject Portland cement grout in the Arctic because there is a layer of unfrozen rock surface which is approximately 2 m deep. During the month of August, the temperature of the unfrozen rock layer reaches +5 °C at a depth of 1 m, which allows the Portland cement to harden in good conditions and to acquire its full strength.After 7 days, the mean shear strength to failure at the rod–group contact, determined when the anchorages were pulled out, was 10 MPa. After 1 year, this strength was close to 20 MPa. These results are similar to those recorded in Sherbrooke for the same grout formulas. Key words: anchorage, cement grout, rock, Arctic, tearing off. [Journal translation] |
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