STUFF FOR DESTRUCTION OF CONCREAT AND A ROCK

摘要

Borate is added to expansive clinker and calcium aluminoferrite as a retarding agent. Concrete or rock breaking stuff comprises clinker of glass lime and glass magnesia 60.0 - 99.0 wt.%; calcium aluminoferrite solid soln. 1.0 - 40.1 wt.%; retarding agent 0.1 - 20.0 wt.% contg. borate alone or sugars, polyhydric alcohol, and inorg. acid with it.