Amethod for producing fiber reinforced cementitious slurry using a multi-stage continuous mixer

Abstract

A method in which a stream (5) of dry cementitious powder from a dry powder feeder (2) passes through a dry cementitious powder inlet conduit (5a) to feed a first feed section (20) of a fiber-slurry mixer (32). An aqueous medium stream (7) passes through at least one aqueous medium stream conduit (7a) to feed a first mixing section (22) of the fiber-slurry mixer (32). A stream (34) of reinforcing fibers passes from a fiber feeder (33) through a reinforcing fibers stream conduit (34a) to feed a second mixing section (24) of the fiber-slurry mixer (32). The stream (5) of dry cementitious powder, aqueous medium stream (7), and stream (34) of reinforcing fibers combine in the fiber-slurry mixer (32) to make a stream of fiber-cement mixture (36) which discharges through a discharge conduit (36a) at a downstream end of the mixer (32).