Bi-tapered reinforcing fibers
AssigneeW. R. Grace & Co.-Conn.
InventorsAnandakumar Ranganathan, Klaus-Alexander Rieder
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Abstract
Non-fractured, non-fibrillatable short fibers, for reinforcing matrix materials such as concrete, have substantially uniform transverse cross-sectional areas along their length for maximum efficiency in pull-out resistance, and two different tapering characteristics along their lengths. Preferred bi-tapered fibers of the invention have a high modulus of elasticity in the range of 5-250 Gigapascal and are preferably modulated in both tapering dimensions. Matrix materials containing the fibers, as well as a method for making the fibers, are disclosed.
Claims33
Fibers for reinforcing a matrix material, comprising:
- substantially non-fractured, non-fibrillatable short reinforcing fibers have substantially uniform transverse cross-sectional areas and two tapering dimensions along their lengths for resisting pull-out from concrete or other matrix material.
A process for making fibers, comprising:
- compressing a metal or polymer fiber between opposed rollers having circumferential surfaces having matched undulations which periodically repeat in identical patter on each of said opposed rollers, thereby creating a tapering of fiber material in each of two transverse dimensions perpendicular to the longitudinal major axis of the fiber.
Dependencies are inferred from the claim text.