Flexural response of GFRP-reinforced geopolymer concrete beams

Maranan, Ginghis B. and Manalo, Allan C. and Karunasena, Warna and Benmokrane, Brahim and Mendis, Priyan (2015) Flexural response of GFRP-reinforced geopolymer concrete beams. In: 27th Biennial National Conference of the Concrete Institute of Australia (Concrete 2015) in conjunction with the 69th RILEM Week: Construction Innovations, Research into Practice, 30 Aug - 2 Sept 2015, Melbourne, Australia.

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Abstract

This study investigated the flexural response of glass fibre reinforced polymer-reinforced geopolymer concrete (GFRP-RGC) beams using a four-point static bending test. Three full-scale beams were cast and reinforced with nearly same amount of longitudinal GFRP reinforcements but of varying diameters at the bottom (4-12.7 mm, 3-15.9 mm, and 2-19.0 mm), two 12.7 mm GFRP bars at the top, and 9.5 mm GFRP stirrups spaced at 100 mm on-centre. The average compressive strength of the geopolymer concrete was 38.2 MPa. Based on the experimental results, all the tested beams showed nearly similar crack pattern, load-deflection response, bending-moment and deflection capacities, and strain readings, suggesting that the flexural response of a GFRP-RGC beam was not significantly influenced by the bar diameter; instead, by the properties of the geopolymer concrete. The 0.3Mu criterion suggested by Bischoff must be adapted in the serviceability design of a GFRP-RGC beam. The flexural capacities of the tested beams were generally higher than the predicted values from ACI 440.1R-06 and CSA S806-12 standards. Furthermore, the GFRP-RGC beams have higher strength compared with their GFRP-reinforced concrete counterparts. Thus, it can be concluded that the GFRP-RGC beams have structural properties that are suitable for civil infrastructure applications.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying
Date Deposited: 21 Jun 2016 05:42
Last Modified: 27 Feb 2017 06:16
Uncontrolled Keywords: flexural response; geopolymer concrete; GFRP bars; four-point static bending test; civil infrastructure
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
Socio-Economic Objective: B Economic Development > 87 Construction > 8702 Construction Design > 870201 Civil Construction Design
URI: http://eprints.usq.edu.au/id/eprint/28453

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