Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Patent
1996-09-05
1999-11-23
Weisberger, Richard
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
428358, 428361, 428364, 428392, 428394, D02G 300
Patent
active
059897139
ABSTRACT:
Fibers, continuous or discontinuous, and bars having optimized geometries for use in the reinforcement of cement, ceramic and polymeric based matrices are claimed. The geometries are designed to increase the ratio of surface area available for bond between the fiber and the matrix to the cross-sectional area of fiber. In the case of a continuous reinforcement comprised of a single fiber or a bar made out of a bundle of fibers, such as is the case in reinforced and prestressed concrete, increasing the surface area available for bond leads to a decrease in crack width, development length, and transfer length. The fibers or bars are also configured to be amenable for twisting or to have spiral like deformations along their longitudinal axis to further develop the mechanical component of bond between the fibers and the matrix. Additional methods of mechanical bond enhancement, such as crimping and/or addition of anchorages, such as hooked ends, paddles, buttons, etc. . . . , can be applied to the claimed fibers to further improve their bond characteristics.
REFERENCES:
patent: 305226 (1884-09-01), Ransome
patent: 4461855 (1984-07-01), Phillips et al.
Katz et al., Handbook of Fillers and Reinforcements for Plastics, 604-606,608-609, 1986.
Ernest L. Ransome--Corcrete Designer, Constructor, Inventor, M.K. Hurd, Concrete International, May 1996 pp. 50-51.
The Regents of the University of Michigan
Weisberger Richard
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