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paratre, Confrence canadienne de gotechnique, Winnipeg, septembre 2003 To be published, Canadian Geotechnical Conference, Winnipeg, September 2003
 

Summary: À paraître, Conférence canadienne de géotechnique, Winnipeg, septembre 2003
To be published, Canadian Geotechnical Conference, Winnipeg, September 2003
SULPHIDE REACTIVITY WITHIN CEMENTED PASTE BACKFILL:
OXYGEN CONSUMPTION TEST RESULTS
Serge Ouellet, Université du Québec en Abitibi-Témiscamingue, Rouyn-Noranda, Canada
Bruno Bussière, Université du Québec en Abitibi-Témiscamingue, Rouyn-Noranda, Canada
Mostafa Benzaazoua, Université du Québec en Abitibi-Témiscamingue, Rouyn-Noranda, Canada
Michel Aubertin, École Polytechnique, Montréal, Canada
Mamadou Fall, Université du Québec en Abitibi-Témiscamingue, Rouyn-Noranda, Canada
Tikou Belem, Université du Québec en Abitibi-Témiscamingue, Rouyn-Noranda, Canada
ABSTRACT
Oxygen consumption tests were performed on 5 manufactured laboratory tailings containing approximately 4, 12, 22, 34
and 74% wt. of pyrite at different degree of saturation, and on the same tailings when incorporated into cemented paste
backfill (CPB). Oxygen consumption results showed that tailings reactivity depends on pyrite content and degree of
saturation. For CPB samples, oxygen consumption seems to be related also to type of binder. The results showed that
the reactivity of a given paste backfill recipe does not significantly increase after 28 days of curing time. Comparing the
oxygen consumption results of sulphide tailings and the corresponding paste backfill samples indicate that CPB samples
are less reactive than the non-cemented manufactured tailings at degrees of water saturation less than 70%. However, at
higher degrees of saturation, the oxygen consumption results of the manufactured tailings were similar and even less
than for the CPB samples. The results of this preliminary study demonstrate that CPB technology is a viable means to

  

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

 

Collections: Engineering; Environmental Management and Restoration Technologies