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An Investigation on Fast Curing of Braid Reinforced FRP Rebars Using a Finite Element Analysis
Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
2013 (English)Conference paper (Refereed) Published
Abstract [en]

Conventional steel rebars are widely used in reinforced concrete structures. They have numerous mechanical advantages such as high stiffness, strength and low cost as well as their wide-spread availability. However, they also present some disadvantages, such as low chemical resistance to corrosion, and their metallic nature that create challenges for structures that require non-magnetic construction. In recent years, fiber reinforced plastic (FRP) composite rebars have been developed to address some of the aforementioned shortcomings. Amongst the various ways to produce these rebars, some researchers utilized a combination of braiding and pultrusion techniques. In this combined technique, a unidirectional-continuous fibers core are is encapsulated by one or more layers of braided fiber preforms. One of the major challenges in broader commercialization of FRP rebars are their limitation in continuous, fast and mass production resulting from long curing times. Depending on the type of the resin that is used, curing of the conventional resins may take up to hours at room temperature. This time can be reduced if the curing is done at elevated temperatures in autoclaves or ovens; however, this poses considerable problems in terms of additional handling, storing and overall production time for these rebars. Literature suggests use of electron beam and high frequency microwaves for fast curing in composite materials; however, these techniques also have shortcomings, such as high costs and potential problems with certain fibers (e.g. arcing of carbon fibers), respectively.

Place, publisher, year, edition, pages
Penn State Univ: DESTECH PUBLICATIONS, INC, 439 DUKE STREET, LANCASTER, PA 17602-4967 USA , 2013.
Keyword [en]
CURE KINETICS, RESIN, COMPOSITES
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:bth-6766ISI: 000329309500088Local ID: oai:bth.se:forskinfo6B9C7FDC0B262B56C1257C9400520B9BISBN: 978-1-60595-107-2OAI: oai:DiVA.org:bth-6766DiVA: diva2:834307
Conference
28th Technical Conference of the American-Society-for-Composites
Available from: 2014-03-07 Created: 2014-03-07 Last updated: 2015-06-30Bibliographically approved

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