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57ime CONGRS CANADIEN DE GOTECHNIQUE 57TH CANADIAN GEOTECHNICAL CONFERENCE 5ime CONGRS CONJOINT SCG/AIH-CNN 5TH JOINT CGS/IAH-CNC CONFERENCE
 

Summary: 57ième CONGRÈS CANADIEN DE GÉOTECHNIQUE 57TH CANADIAN GEOTECHNICAL CONFERENCE
5ième CONGRÈS CONJOINT SCG/AIH-CNN 5TH JOINT CGS/IAH-CNC CONFERENCE
ÉVOLUTION DES PROPRIÉTÉS DE RÉTENTION D'EAU DES REMBLAIS
MINIERS CIMENTÉS EN PÂTE DURANT LE CURAGE
Jovette Godbout, Université du Québec en Abitibi-Témiscamingue Rouyn-Noranda, Québec
Bruno Bussière, Université du Québec en Abitibi-Témiscamingue Rouyn-Noranda, Québec
Michel Aubertin, École Polytechnique, Montréal, Québec
Tikou Belem, Université du Québec en Abitibi-Témiscamingue, Rouyn-Noranda, Québec
Mostafa Benzaazoua, Université du Québec en Abitibi-Témiscamingue, Rouyn-Noranda
ABSTRACT
Hydraulic binders in cemented paste backfill (CPB) modify the microstructure of the paste which in turn will affect its
hydraulic properties. Modified suction tests were performed on cemented paste backfill samples, at different curing
times, to investigate their water retention curve (WRC). Because the material evolves with time, the procedure for suction
tests conducted in Tempe cell was modified to carry out the test in a period of 24 hours. The time to reach the equilibrium
volumetric water content ( ) for a given suction ( ) is also discussed in this article. Test results obtained with the
modified approach show that the WRC evolves with curing time. The short-term air entry value increases while the slope
of the WRC softens with time. Numerical modeling was also done to illustrate the importance of accounting for the
evolution of the WRC to simulate hydraulic behaviour of an underground stope backfilled with CPB.
RÉSUMÉ
L'agent liant dans les remblais miniers cimentés en pâte (RMCP) modifie la microstructure du matériau et, par le fait

  

Source: Aubertin, Michel - Département des génies civil, géologique et des mines, École Polytechnique de Montréal

 

Collections: Engineering; Environmental Management and Restoration Technologies