Reactivatable set-inhibited cementitious compositions

Details Reactivatable set-inhibited cementitious compositions Reactivatable set-inhibited cementitious compositions

C - Chemistry, Metallurgy

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B

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C04B 7/32 (2006.01) C04B 28/06 (2006.01) C09K 8/46 (2006.01) C09K 17/10 (2006.01) C09K 17/44 (2006.01) E21D 20/02 (2006.01) F16B 13/14 (2006.01)

Patent

CA 1200566

ABSTRACT REACTIVATABLE SET-INHIBITED CEMENTITIOUS COMPOSITIONS Aqueous grouting compositions based on high alumina cement have th onset of setting delayed for upwards of one month by the incorporation therein of a set-inhibiting agent such as boric acid or gluconic acid delta lactone and can then be rapidly reactivated for use by the incorporation therein of a reactivator, for example lithium carbonate, to produce a high strength hardened cementitious composition. The reactivated composition can advantageously be used to anchor a reinforcing element such as a rockbolt or dowel in a borehole and for this purpose the set-inhibited cementitious composition and the reactivator can be packaged in the separate compartments respectively of a dual-compartment frangible cartridge.

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