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Description:

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 the failure mechanisms and develop service life models. This study is on the me-chanical properties of a prototype basalt fiber reinforced polypropylene (BFPP) rod under qua-si-static and sustained loading. Static strength and modulus at elevated temperatures do not de-crease significantly, but the variability in strength increases with temperature, as shown by 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.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: Thermoplastic composite, Basalt fiber, Fatigue properties, Creep properties

Date published: 2021-09-16

Publisher: MDPI AG

Journal:

• Polymers (ISSN: 20734360) vol. 13 issue. 18 p. 3136-3136

Funding:

• JST Center of Innovation (COI)

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.3390/polym13183136

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Updated at: 2024-01-05 22:14:08 +0900

Published on MDR: 2023-11-28 13:30:24 +0900