Characterization of the static, creep, and fatigue tensile behavior of basalt fiber/polypropylene composite rods for passive concrete reinforcement

Jonathon Tanks, Kimiyoshi Naito, Hisai Ueda

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Fiber-reinforced polymer (FRP) composites are becoming more frequently adopted as so-called “corrosion-resistant” concrete reinforcement materials due to their excellent mechanical properties and formability. However, their long-term reliability must be thoroughly investigated in order to understand failure mechanisms and to develop service life models. This study is on the mechanical properties of a prototype basalt fiber-reinforced polypropylene (BFPP) rod under quasi-static and sustained loading. Static strength and modulus at elevated temperatures do not decrease significantly, but the variability in strength increases with temperature, as shown by a Weibull analysis. Creep behavior is typical of unidirectional FRP, where the creep rupture strength follows a power law. Fatigue at various stress ratios R reveals the sensitivity of composite strength to the matrix damage, which increases at lower values of R (i.e., higher stress amplitudes). These results are discussed in the context of service life and concrete structure design guidelines.

Original languageEnglish
Article number3136
JournalPolymers
Volume13
Issue number18
DOIs
Publication statusPublished - 2021 Sept

Keywords

  • Basalt fiber
  • Creep properties
  • Fatigue properties
  • Thermoplastic composite

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