Fibre Reinforced Cementitious Matrix Systems for Fire-Safe Flexural Strengthening of Concrete: Pilot Testing at Ambient Temperatures

L.A. Bisby, T.J. Stratford, E.C. Roy, M. Ward

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In recent years, textile reinforced mortar (TRM) systems have emerged as novel means of strengthening damaged or deficient masonry or reinforced concrete (RC) structures [1]. These systems consist of open-weave fibre fabrics which are applied to the surfaces of structural elements using specialized inorganic mortars. Until recently the open-weave fabrics for these systems normally consisted of carbon fibres, which led to comparatively poor utilization of the fibres due to fibre pullout at relatively low load levels. Fibre reinforced cementitious matrix (FRCM) systems based on non-woven polybenzoxozole (PBO) fibre rovings have also been introduced [2]. The unique chemical structure of the PBO fibres allows them to bond directly to cementitious mortar matrices, thus eliminating the need for an epoxy resin to bond the fibres to an inorganic substrate [2]. These PBO-based FRCM systems have several advantages over alternative systems such as externally-bonded (EB) fibre reinforced polymer (FRP) systems, most notably their breathability and superior performance in fire (in particular their non-combustibility). However, while these systems have been applied in several projects in Europe, research on both their ambient and high temperature performance in flexural strengthening applications is needed before they can be applied widely with confidence.
Original languageEnglish
Title of host publicationAdvanced Composites in Construction (ACIC) 2009 Conference Proceedings
PublisherNetComposites Ltd.
Pages449-460
Number of pages11
Publication statusPublished - 2009

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