초록 ▼

An extruded fiber reinforced cement matrix composite having substantially improved tensile strength with strain hardening behavior and substantially improved tensile strain, and improved flexural properties in three-point bending. The composite is made by mixing cement, water, water soluble binder,

An extruded fiber reinforced cement matrix composite having substantially improved tensile strength with strain hardening behavior and substantially improved tensile strain, and improved flexural properties in three-point bending. The composite is made by mixing cement, water, water soluble binder, and relatively short, discontinuous reinforcing fibers, preferably short poly vinyl alcohol fibers, to provide an extrudable mixture; then extruding the mixture to shape, and curing the cement.

대표청구항 ▼

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] A method of making a fiber reinforced cement matrix composite, comprising:dispersing discontinuous reinforcing fibers comprising synthetic hydrophilic polymeric material in aqueous

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] A method of making a fiber reinforced cement matrix composite, comprising:dispersing discontinuous reinforcing fibers comprising synthetic hydrophilic polymeric material in aqueous slurry to form a dispersion of wetted reinforcing fibers,then mixing hydraulic cement, water, and water soluble binder with said dispersion including controlling the weight ratio of water to cement in the range of 0.2 to 0.4 to provide an extrudable mixture having the fibers dispersed uniformly therein,extruding the mixture to shape through a die orifice that imparts a shape to said mixture and is effective to compress and shear said mixture to improve bonding between said fibers and said cement, andcuring the cement, wherein an extruded and cured composite is formed exhibiting increased tensile strength properties as compared to a cast composite of similar composition and strain hardening behavior when stressed in tension with at least 1% tensile strain.