Reinforcing body and method for its manufacturing
A reinforcing body and a method for its manufacturing. The reinforcing body has at least one reinforcing bar. Each reinforcing bar has a core with a peripheral surface at which a rib structure with at least one rib and at least one depression is provided. The core is formed by at least one first fiber strand embedded in a core matrix. For creating the at least one rib at least one second fiber strand is embedded into a rib matrix, wherein the at least one second fiber strand and the rib matrix are separated by at least one depression in a direction parallel to a longitudinal center axis of the reinforcing bar, such that the at least one second fiber strand is separated into fiber strand sections. The at least one first and the at least one second fiber strand have fibers of different materials.
1. A reinforcing body ( 10 ), comprising:
at least one reinforcing bar ( 11 ) that extends in an axial direction along a longitudinal center axis (A) that has a core ( 17 ) and a rib structure ( 18 ) arranged at a peripheral surface ( 20 ) of the core ( 17 ) having at least one rib ( 19 ) and at least one depression ( 22 ) that each extend transversely to the axial direction, wherein the at least one rib ( 19 ) comprises one of a single helical rib having a plurality of axially spaced-apart rib portions and a plurality of separate, spaced-apart ribs,
wherein the core ( 17 ) comprises at least one first fiber strand ( 14 ) of first fibers ( 26 ) embedded in a core matrix ( 27 ), wherein the rib structure ( 18 ) comprises at least one second fiber strand ( 25 ) of second fibers ( 28 ) embedded in a rib matrix ( 29 ) divided into a plurality of separate and axially spaced-apart fiber strand sections ( 25 a ) formed by removal of at least a portion of the at least one second fiber strand ( 25 ), wherein each of the plurality of fiber strand sections extends between opposite axial ends,
wherein the fiber strand sections ( 25 a ) of the at least one second fiber strand ( 25 ) that are directly adjacent in the axial direction are separate and axially spaced from each other by the at least one transversely extending depression ( 22 ) formed by the removal of the at least a portion of the at least one second fiber strand ( 25 ) and each fiber strand section ( 25 a ) is arranged in a rib ( 19 ) or a rib portion of the at least one rib ( 19 ),
wherein the fiber strand sections ( 25 a ) of the at least one second fiber strand ( 25 ) extend in the axial direction at least in straight extending sections of the reinforcing bar ( 11 ),
wherein the second fibers ( 28 ) of the at least one second fiber strand ( 25 ) are made of a fiber material that is different from a fiber material of the first fibers ( 26 ) and the fiber material of the second fibers ( 28 ) is less alkali-resistant than the fiber material of the first fibers ( 26 ), and
wherein the at least one rib ( 19 ) has a lateral dimension extending in a lateral direction perpendicular to the axial direction measured from the peripheral surface ( 20 ) of the core to an outer peripheral extent of the at least one rib ( 19 ), and the at least one transversely extending depression ( 22 ) has a lateral dimension extending from the peripheral surface ( 20 ) of the core ( 17 ) to an outer peripheral extent of the at least one transversely extending depression of from 0 to 50% of the lateral dimension of the at least one rib ( 19 ) such that adjacent ribs or rib portions of the at least one rib ( 19 ) are axially spaced-apart from one another by the at least one transversely extending depression.
2. The reinforcing body according to claim 1 , wherein the first fibers ( 26 ) of the first fiber strand ( 24 ) are oriented mainly parallel to the longitudinal center axis (A) of the reinforcing bar ( 11 ) in straight extending sections of the reinforcing bar ( 11 ).
3. The reinforcing body according to claim 1 , wherein the second fibers ( 28 ) of the fiber strand sections ( 25 a ) of the second fiber strand ( 25 ) are oriented mainly parallel to the longitudinal center axis (A) of the reinforcing bar ( 11 ) in straight extending sections of the reinforcing bar ( 11 ).
4. The reinforcing body according to claim 1 , wherein the fiber material of the first fibers ( 26 ) has a higher tensile strength than the fiber material of the second fibers ( 28 ).
5. The reinforcing body according to claim 1 , wherein the first fibers ( 26 ) contain carbon or AR-glass.
6. The reinforcing body according to claim 1 , wherein the second fibers ( 28 ) comprise glass or polymer material or consist of glass or polymer material.
7. The reinforcing body according to claim 1 , wherein at least one of the core matrix ( 27 ) of the reinforcing bar ( 11 ) and the rib matrix ( 29 ) of the at least one rib ( 19 ) includes a uniform matrix material (M, M 2 ).
8. The reinforcing body according to claim 7 , wherein the core matrix ( 27 ) of the reinforcing bar ( 11 ) and the rib matrix ( 29 ) of the at least one rib ( 19 ) include the same matrix material (M).
9. The reinforcing body according to claim 1 , wherein the fiber material of the second fibers ( 28 ) has a coefficient of thermal expansion that is different from a coefficient of thermal expansion of the fiber material of the first fibers ( 26 ).