Neuartige geflochtene Garnkonstruktionen zur verbesserten Verbundbildung nichtmetallischer Betonbewehrungen

Research output: Contribution to journalResearch articleContributedpeer-review

Abstract

Novel braided yarn constructions for improved bond formation of non-metallic concrete reinforcements. Textile or non-metallic reinforcements are considered a promising alternative to conventional steel reinforcement. While ribbed steel bars transfer loads into concrete through mechanical interlocking, impregnated smooth carbon filament yarns rely predominantly on adhesion. This limits bond strength and hinders the efficient utilization of their mechanical performance. Surface-profiled reinforcement structures based on braiding technology therefore offer high potential for improved and universally applicable load transfer in concrete construction. In this study, novel surface-structured yarn constructions based on advanced braiding technology were developed to enhance bond formation, tensile and bond behavior, and form-fit structural stability compared to smooth carbon filament yarns. In addition to multiaxial warp-knitted grid structures, the aim was to provide high-performance yarn structures suitable for robotic yarn placement, continuous-reinforced concrete 3D printing, and reinforcement bar production. The results of tensile and bond investigations demonstrate the high potential of fully impregnated, surface-profiled braided structures with continuous fiber paths as high-performance concrete reinforcement in the form of yarns, grids, or bars. Compared to unprofiled structures, the bond stress–slip relationship increased by 40 % to 450 % while maintaining high tensile strength.

Details

Original languageGerman
JournalBeton- und Stahlbetonbau
Publication statusE-pub ahead of print - 19 Mar 2026
Peer-reviewedYes

External IDs

ORCID /0000-0002-5407-3948/work/211721900

Keywords

ASJC Scopus subject areas

Keywords

  • bond behavior, braided bars, braiding technology, carbon concrete, non-metallic reinforcement, surface profiling, tensile test