Extruded fiber reinforced cement matrix composites and method of making same
AssigneeNorthwestern University
InventorsSurendra P. Shah, Yixin Shao, Shashi Marikunte
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Abstract
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 is made by mixing cement, water, water soluble binder, and relatively short, discontinuous reinforcing fibers, preferably short polyvinyl alcohol fibers, to provide an extrudable mixture, the extruding the mixture to shape, and curing the cement.
Claims5
An extruded fiber reinforced cement matrix composite having a die extruded shape and improved tensile properties in one or more directions compared to a cast composite of similar composition, comprising a cured cement matrix and discontinuous polyvinyl alcohol reinforcing fibers dispersed in the matrix.
An extruded fiber reinforced cement matrix composite having a die extruded shape and improved tensile properties in all directions compared to a cast composite of similar composition, comprising a cured cement matrix and discontinuous polyvinyl alcohol reinforcing fibers dispersed in the matrix and preferentially aligned in an extrusion direction of the composite.
An extruded fiber reinforced cement matrix composite having an extruded shape and having a cured cement matrix with discontinuous polyvinyl alochol reinforcing fibers dispersed in the matrix to provide a tensile strength of at least 750 psi in an extrusion direction, strain hardening behavior with at least 1% tensile strain, and improved flexural strength in three-point bending compared to unreinforced matrix.
An extruded fiber reinforced cement matrix composite having an extruded shape and having improved tensile properties in all directions compared to unreinforced matrix, strain hardening behavior with tensile strain, and improved flexural strength in three-point bending compared to unreinforced matrix, comprising a cured cement matrix and discontinuous polyvinyl alcohol reinforcing fibers dispersed in the matrix and preferentially aligned in an extrusion direction to an extent to provide increased tensile properties in said extrusion direction, provide said strain hardening behavior and provide said flexural strength.
Dependencies are inferred from the claim text.