Shotcrete compositions

Details Shotcrete compositions Shotcrete compositions

1993-11-29

1995-05-09

Green, Anthony

Coating processes

Spraying

Moving nozzle or projector

427384, 4273977, 427421, 106713, 106717, 106724, 106727, 106806, 106819, 106823, 428688, 428703, B05D 102, C04B 2216

Patent

active

054138191

ABSTRACT:
The storage and processing times of sprayed concrete can be significantly extended by the addition of a retarder, a chemical compound which is capable of chelating with calcium ions. Preferred retarders are phosphonic 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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