Spinability and characteristics of particle-shell PP-bicomponent fibers for crack bridging in mineral-bonded composites
Research output: Contribution to book/conference proceedings/anthology/report › Chapter in book/anthology/report › Contributed › peer-review
Contributors
Abstract
Polypropylene (PP)-fibers are one of the most widely used polymer fibers for several different applications in fiber reinforced concrete due to their availability, low price, chemical inertness and stability in high alkaline environment. In order to improve the fracture energy and toughness of fiber-reinforced mineral-based composites under impact loads, the energy absorption provided by the fiber material itself but also the failure mechanisms in the fiber-matrix interphase play a crucial role. A desirable pull-out behavior for high energy absorption is achieved for polymer fibers with high tensile strength in combination with high surface roughness. Based on this knowledge, new PP-bicomponent fibers have been developed containing different particles (e.g. Al2O3, CaCO3) in the outer shell in order to generate a rough fiber surface. In this work the results of first spinning trials of PP-bicomponent fibers produced by a lab-scale spinning equipment are presented. The fibers` tensile strength and particle distribution along the surface was determined depending on the drawing ratio. In single-fiber pull-out tests the fibers enabled high energy absorption compared to state-of-the-art PP-fibers. Furthermore, the structure of the fibers surface before and after pull-out was analyzed by scanning electron microscopy and revealed enhanced mechanical interlocking.
Details
Original language | English |
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Title of host publication | RILEM Bookseries |
Publisher | Springer Science and Business Media B.V. |
Pages | 255-264 |
Number of pages | 10 |
Publication status | Published - 2022 |
Peer-reviewed | Yes |
Publication series
Series | RILEM Bookseries |
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Volume | 36 |
ISSN | 2211-0844 |
Keywords
Research priority areas of TU Dresden
DFG Classification of Subject Areas according to Review Boards
Subject groups, research areas, subject areas according to Destatis
Sustainable Development Goals
ASJC Scopus subject areas
Keywords
- Bicomponent fibers, Bond strength, Loading rate, Melt-spinning, PP fibers