Injection d'ancrages à base de ciment Portland dans l'arctique

• Published in: Canadian Journal of Civil Engineering
• Main Authors: Benmokrane, Brahim, Aïtcin, Pierre-Claude, Ballivy, Gérard
• Format: Article in Journal/Newspaper
• Language: English
• Published: Canadian Science Publishing 1987
• Subjects: General Environmental Science; Civil and Structural Engineering; Arctic; Anchorage
• Online Access: http://dx.doi.org/10.1139/l87-099; http://www.nrcresearchpress.com/doi/pdf/10.1139/l87-099

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]