Carbonaceous extenders for flexible cement

Details Carbonaceous extenders for flexible cement Carbonaceous extenders for flexible cement

C - Chemistry, Metallurgy

09

K

C09K 8/467 (2006.01) C04B 14/02 (2006.01)

Patent

CA 2720218

A flexible cement stable at high temperatures contains an extender that is a finely ground carbonaceous material, for example a bituminous coal and/or a finely ground coke prepared from coal and/or liquid hydrocarbons. Preferred cokes are made from bituminous coals and from petroleum, heavy oil, and oil from tar sands, oil shales or oil sands. The carbonaceous material is present in an amount up to 100 percent by weight of cement and the particle size is preferably from 1 to 1000 microns. The carbonaceous material is also effective as an extender, and the slurries and set cements have low specific gravity. Optional additives include silica and Wollastonite.

Un ciment flexible stable aux températures élevées contient une matière de charge qui est une matière carbonée finement broyée, par exemple une houille et/ou un coke finement broyé préparés à partir de charbon et/ou d'hydrocarbures liquides. Les cokes préférés sont fabriqués à partir de houilles et à partir de pétrole, de pétrole lourd et de pétrole provenant de sables bitumineux, de schistes bitumineux ou de sables pétrolifères. La matière carbonée est présente dans une quantité allant jusqu'à 100 pour cent en poids du ciment et la dimension des particules est de préférence de 1 à 1000 microns. La matière carbonée est également efficace comme matière de charge et les barbotines et les ciments durcis ont une faible densité. Les additifs facultatifs comprennent la silice et la Wollastonite.

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