Modified deformed reinforcement fibers, methods of making, and uses
The invention relates to modified reinforcement fibers for use in a variety of applications. The modification includes crimping linear or straight reinforcement fibers to create a deformed or different shaped reinforcement fiber. Examples of the shaped fibers resulting from crimping include w-shaped, s-shaped, z-shaped and wedge-shaped.
1. A cementitious composition, comprising:
a plurality of reinforcement fibers having a length; and a deformation formed in the length, wherein the deformation includes at least one crimp, the reinforcement fiber composed of a material selected from the group consisting of polymer, aramid, nylon and blends thereof;
cement; and
water.
2. The cementitious composition of claim 1 , wherein the deformation includes six crimps in the length.
3. The cementitious composition of claim 1 , wherein the plurality of fibers is composed of material selected from the group consisting of polyolefin, aramid, and nylon and mixtures thereof.
4. The cementitious composition of claim 1 , wherein the plurality of fibers is composed of material selected from the group consisting of polyethylene, polypropylene, and aramid and mixtures thereof.
5. A method of preparing a fiber-containing cementitious composition or drilling composition, comprising:
providing a plurality of original reinforcement fibers having a substantially linear shape;
forming a deformation in the plurality of original reinforcement fibers by forming at least one crimp in the linear shape of the fibers;
deforming the linear shape of the plurality of original reinforcement fibers to produce a plurality of modified reinforcement fibers; and
mixing the plurality of modified reinforcement fibers in a cementitious composition or a drilling fluid.
6. The method of claim 5 , wherein the deforming of the linear shape comprises a reinforcement fiber having a shape selected from the group consisting of w-shaped, s-shaped, z-shaped and wedge-shaped.
7. The method of claim 5 , wherein the mixing of the plurality of modified reinforcement fibers in the cementitious composition is conducted in a vessel selected from the group consisting of a concrete mixing machine, a hopper and a transportation vehicle.
8. The method of claim 5 , wherein the mixing of the plurality of modified reinforcement fibers in the cementitious composition is conducted prior to introducing said cementitious composition into a wellbore.