A METHOD FOR THE MANUFACTURE OF A PUMPABLE MATERIAL FOR USE IN FORMING A BACK FILL OF HIGH STRENGTH IN A MINE OF TUNNEL

摘要

An aqueous slurry of backfill material e.g. slimes, includes a settable material and an activator therefor, e.g. pulverized fuel ash and lime, and a lubricant e.g. clay and a plasticizer, e.g. a lignosulphonate so that the slurry can be pumped over long distances but will then set to develop high early strength.