@article{HerzMuscatStr{\"u}bbe2025,
  author    = {Herz, Jonas and Muscat, Dirk and Str{\"u}bbe, Nicole},
  title     = {The Influence of Fillers on the Reinforcement Capabilities of Polypropylene Based Mono-Material and Core-Shell Fibers in Concrete, a Comparison},
  journal   = {Polymers},
  volume    = {17},
  number    = {13},
  publisher = {MDPI},
  address   = {Basel},
  doi       = {10.3390/polym17131781},
  institution = {Fakult{\"a}t f{\"u}r Ingenieurwissenschaften; Zentrum f{\"u}r Forschung, Entwicklung und Transfer},
  pages     = {24},
  year      = {2025},
  abstract  = {Noncorrosive concrete reinforcement, such as polymer fibers, is needed to overcome the current issues caused by corroded steel reinforcements. Fibers made of polypropylene show a low bonding behavior in concrete. Fillers can help to overcome this issue but often lead to reduced mechanical properties. Core-shell fibers, which split the mechanical properties and the bonding behavior between the core and the shell component, could be a solution. This study investigates mono-material and core-shell fibers produced with calcium carbonate and bentonite fillers and compares their behavior in tensile tests, density measurements, contact angle measurements, topography measurements, single fiber pull-out tests, reflected light microscopy, and thermogravimetric analysis. The fillers caused an increased drawability, resulting in higher mechanical properties. Further, in the core-shell fibers, the calcium carbonate increased the surface roughness, which led to a better anchoring of the fiber in concrete, which was also visible in the deformation during pull-out observed in reflected light microscopy pictures. The thermogravimetric analysis showed a delay in onset of degradation for fibers containing bentonite.},
  language  = {en}
}