Flexible fiber reinforced composite rebar

Inactive Publication Date: 2008-06-19
KNOUFF BRIAN J +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0005]The present invention provides an improved composite reinforcement bar or rebar structure. The rebar structure is generally formed by continuous fibers embedded in a thermoplastic resin matrix to form a reinforcement bar. The bar is flattened to achieve a cross sectional aspect ratio greater than one to one. The bar is then twisted in a substantially helical manner. In one embodiment of the rebar structure, the bar has a substantially elliptical cross sectional shape with a cross sectional aspect ratio of about two to o

Problems solved by technology

Concrete and other masonry or cementitious materials have high compressive strength but relatively low tensile strength.
Unfortunately, steel and other metals are sus

Method used

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  • Flexible fiber reinforced composite rebar
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Embodiment Construction

[0011]As required, detailed embodiments of the present invention are disclosed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which may be embodied in various forms. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present invention in virtually any appropriately detailed structure.

[0012]Referring now to the drawings in more detail, the reference numeral 1 generally designates a flexible fiber reinforced composite reinforcement bar or rebar structure embodying the present invention. The rebar structure 1 generally includes a plurality of reinforcement fibers 2 (FIGS. 2 and 3) embedded within a thermoplastic resin matrix 3. The rebar structure 1 is twisted in a generally helical manner.

[0013]FIG. 1 diagrammatically illustrates system and...

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Abstract

A flexible fiber reinforced composite rebar structure includes a plurality of continuous fibers embedded within a thermoplastic resin. The rebar structure has an elliptical cross sectional shape with an aspect ratio of about two to one and a twist with a twist pitch of about 30 cm. The thermoplastic resin matrix enables the rebar structure to be bent in the field by the application of heat to soften the structure and thereafter cooled to return to a rigid state.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority under 35 U.S.C. 119(e) and 37 C.F.R. 1.78(a)(4) based upon copending U.S. Provisional Application, Ser. No. 60 / 874,828 for FLEXIBLE REBAR, filed Dec. 14, 2006, which is incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]Concrete and other masonry or cementitious materials have high compressive strength but relatively low tensile strength. Thus, when concrete is employed as a structural material, it is conventional to incorporate reinforcing members to enhance the tensile strength of the structure. The reinforcing members are usually comprised of a rigid rod or bar, such as a steel rod or bar. Such reinforcing members are typically referred to as “rebar”. Unfortunately, steel and other metals are susceptible to oxidation. In addition, such materials are quite rigid prior to use so that the placement of such reinforcing members can be difficult and time-intensive. As a result, conventional meta...

Claims

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Application Information

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IPC IPC(8): E04C5/07
CPCE04C5/07B29C53/14
Inventor KNOUFF, BRIAN J.FATZ, ALANTHOMPSON, A. DEANJUNK, WILLIAM P.
Owner KNOUFF BRIAN J
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