Patent ID: 7670520
Filing Date: 2010-03-02
Classification: B28B,E04C,Y10T

Abstract:
1. A process for producing structural cementitious panels made of at least one layer of fiber reinforced cementitious slurry, said process for each such layer of slurry comprising: (a) providing a moving web; (b) depositing a first layer of individual, loose fibers upon the web; (c) depositing a layer of settable slurry upon the deposited first layer of individual, loose fibers; (d) depositing a second layer of individual, loose fibers upon the deposited layer of settable slurry; and (e) actively embedding both said layers of individual, loose fibers into the layer of slurry to distribute the fibers throughout the slurry, wherein the respective proportion of fibers in the slurry layers produced by steps (b) through (e) is represented by a projected fiber surface area fraction less than 0.65.