Treating fly ash to produce a concrete additive comprises grinding the ash and treating it with an oxidizing agent in a single operation

摘要

Treating fly ash comprises grinding the ash and treating it with an oxidizing agent in a single operation. Independent claims are also included for: (1) fly ash treated as above; (2) concrete or concrete premix comprising cement, aggregate, air pore formers, optional additives and fly ash treated as above; (3) apparatus for treating fly ash as above, comprising a mill with an inlet for introducing an oxidizing agent.