Improved shotcrete compositions

Details Improved shotcrete compositions Improved shotcrete compositions

C - Chemistry, Metallurgy

04

B

117/163, 261/50,

C04B 16/00 (2006.01) B05D 1/02 (2006.01) B05D 7/24 (2006.01) C04B 24/00 (2006.01) C04B 28/02 (2006.01)

Patent

CA 2035008

The storage and processing times of sprayed concrete can be signifi- cantly extended by the addition of a retarder, a chemical compound which is capable of chelating with calcium ions. Preferred retarders are phos- phonic acid derivatives which have at least one amino and/or hydroxyl group. The retarder can be used for both wet- and dry-sprayed concrete, the usual accelerators can be used for activation, and the strength is not adversely affected.

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