Comparative study on the behaviour of different infill materials for pre-fabricated fibre composite repair systems

Mohammed, Ali A. and Manalo, Allan C. and Maranan, Ginghis B. and Zhuge, Yan and Vijay, P. V. (2018) Comparative study on the behaviour of different infill materials for pre-fabricated fibre composite repair systems. Construction and Building Materials, 172. pp. 770-780. ISSN 0950-0618

Abstract

Prefabricated fibre-reinforced polymer (FRP) composite jacket is now becoming an effective repair system
for deteriorating piles and columns exposed to marine environment. This system works by providing grout
infills between the annulus of the existing structure and the composite jacket. Few studies are however
available on the optimal grouting materials that can effectively transfer the stresses between the existing
structure and the FRP jacket. This study is investigating the effect of cementitious, concrete and epoxybased
grout infills on the structural behaviour of pre-fabricated glass-FRP (GFRP) tubes. The considered
grouts have compressive strength and modulus of elasticity ranging from 10 MPa to 70 MPa and from
10 GPa to 35 GPa, respectively. The experimental results showed that the behaviour of the composite repair
system is highly dependent on the modulus of elasticity and the compressive strength of the grout infill.
The brittle failure behaviour of the cementitious and epoxy grouts led to localised failure in the FRP repair
system while the progressive cracking and crushing of the concrete infill resulted in effective utilisation of
the high strength properties of the composite materials. Theoretical analysis of the overall compressive
behaviour has also been conducted and showed very good agreement with the experimental results.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version, in accordance with the copyright policy of the publisher.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying
Date Deposited: 18 Jan 2019 05:20
Last Modified: 24 Jan 2019 05:10
Uncontrolled Keywords: grout-infills; new composite materials; systems and strengthening techniques; FRP tube; composite jacket; characterization of FRP and FRC materials/systems
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090502 Construction Engineering
09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
09 Engineering > 0905 Civil Engineering > 090507 Transport Engineering
Identification Number or DOI: 10.1016/j.conbuildmat.2018.04.025
URI: http://eprints.usq.edu.au/id/eprint/34921

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