Multi-leg fiber reinforced concrete

• US 10,563,403 B1
• Filed: 10/30/2018
• Issued: 02/18/2020
• Est. Priority Date: 10/30/2018
• Status: Active Grant

• Current Assignee: King SAUD University
• Original Assignee: King SAUD University
• Inventors: Almusallam, Tarek H., Abbas, Husain, Al-Salloum, Yousef A., Abadel, Aref A.
• Primary Examiner(s): Katcheves, Basil S
• Assistant Examiner(s): Hijaz, Omar F
• Application Number:
  US16/175,248
• Time in Patent Office: 476 Days
• CPC Class Codes: C04B 14/06 Quartz; Sand
• CPC Class Codes: C04B 14/48 Metal
• CPC Class Codes: C04B 20/0008 Materials specified by a shape not covered by C04B20/0016 - C04B20/0056, e.g. nanotubes
• CPC Class Codes: C04B 20/0048 Fibrous materials
• CPC Class Codes: C04B 20/0068 Composite fibres, e.g. fibres with a core and sheath of different material
• CPC Class Codes: C04B 20/0076 characterised by the grain distribution
• CPC Class Codes: C04B 2103/32 Superplasticisers
• CPC Class Codes: C04B 2111/34 Non-shrinking or non-cracking materials
• CPC Class Codes: C04B 28/04 Portland cements
• CPC Class Codes: E04B 2103/02 of ceramics, concrete or other stone-like material
• CPC Class Codes: E04C 5/012 Discrete reinforcing elements, e.g. fibres
• CPC Class Codes: E04C 5/073 Discrete reinforcing elements, e.g. fibres

Abstract

The multi-leg fiber reinforced concrete is concrete in which fibers have been embedded to prevent the concrete from being fractured due to cracks developing therein. Each fiber has multiple legs, defining two and three dimensional structures. At least one fiber is embedded in a volume of concrete, where the at least one fiber has at least first and second legs respectively extending along first and second directions. The first and second directions are angularly oriented with respect to one another between 45° and 135°, with each of the first and second legs having a free end and a fixed end. Each free end has a substantially Z-shaped contour. The fixed ends of the first and second legs may be joined together to define a two-dimensional fiber structure. The at least one fiber may be partially coated with a polymeric material, such as polypropylene.

Claims

1. A multi-leg fiber reinforced concrete, comprising:

a volume of concrete; and

at least one fiber embedded in the volume of concrete, wherein the at least one fiber consists of a first leg, a second leg, and an intermediate third leg respectively extending along first, second, and third distinct directions, the first and second directions being angularly oriented with respect to one another between 45° and

135°

, each of the first and second legs having a free end and a fixed end, each of the free and fixed ends are connected by a straight portion of the fiber, each of the free ends having a substantially Z-shaped contour, wherein the third leg has opposed first and second ends, the first end thereof being joined to the fixed end of the first leg, the opposed second end thereof being joined to the fixed end of the second leg, the third leg being configured as a straight portion of the fiber and extending along the third distinct direction, the third distinct direction being angularly oriented with respect to each of the first and second directions between 45° and

135°

, further wherein a first plane defined by the first direction and the third direction is orthogonal to a second plane defined by the second direction and the third direction.

2. The multi-leg fiber reinforced concrete as recited in claim 1, wherein the fixed end of the first leg is joined to the fixed end of the second leg.

3. The multi-leg fiber reinforced concrete as recited in claim 1, wherein the at least one fiber comprises braided fiber.