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Application of Multi-layer Composites in Construction and their Future Challenges

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Author Affiliations

  • 1CSIR-Structural Engineering Research Centre, Chennai, INDIA
  • 2 VIT University, Vellore, INDIA

Res. J. Material Sci., Volume 1, Issue (3), Pages 12-18, April,16 (2013)

Abstract

A concise state-of-the-art survey on fiber-reinforced polymer (FRP) composites for civil engineering towards construction applications is presented. It is an emerging trend in construction field, since it is one of the main repair and retrofitting material, in general and has profound applications in aerospace and marine construction in particular. FRPs are well known for enhancing the mechanical and durability properties of concrete. The paper is organized into separate sections on the various mechanical properties like compressive strength, bond strength, flexural strength; durability properties like chloride ion penetration, elevated temperature, freeze thaw cycle, corrosion resistance, seismic behavior of FRP wrapped structural concrete members proposed by various authors are also discussed. Each of these sections is segmented into a short review and future challenges including problem identification based on literature review as well as authors view point. Based on the experimental investigations of various authors, it can be concluded that FRP wrapping on concrete members increases the strength, ductility and also durability of concrete. However, the associated problems due to continuous exposure of moisture at the concrete-epoxy interface need to be addressed in detail. The problem identification and the methodologies for rectification are also discussed in this paper. Functions of epoxy and scope on functional modification for better bonding between the multi-layer composites i.e, concrete-epoxy-(fiber wrap)-epoxy-(fiber wrap), where n - no. of layers are discussed.

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