FRP-strengthened and all-FRP structures paper
Lembo, K, Lokuge, W & Karunasena, W 2014, 'Geopolymer concrete with FRP confinement', in ST Smith (ed.), 23rd Australasian Conference on the Mechanics of Structures and Materials (ACMSM23), vol. I, Byron Bay, NSW, 9-12 December, Southern Cross University, Lismore, NSW, pp. 483-488. ISBN: 9780994152008.
Given the recent attention towards renewable and environmentally friendly technologies, usage of geopolymer concrete, a greener substitute for traditional Ordinary Portland Cement (OPC) concretes is becoming more prevalent than ever. However, unconfined Geopolymer concrete exhibits much higher levels of brittleness compared to that of OPC concretes. Ductility of geopolymer concrete can be increased by lateral confinement. Fibre Reinforced Polymer (FRP) confined concrete, demonstrates a major gain in ductility and strength compared to that of steel confined concrete. This research investigates the structural performance of geopolymer concrete with FRP wrapping (Carbon Fibre Reinforced Polymer and Glass Fibre Reinforced Polymer). Experimental program included twenty geopolymer concrete samples (ten 100 x 200 mm and ten 150 x 300 mm). Test variables were the type of confinement (GFRP and CFRP), number of confinement layers (one and two) and specimen size. It is observed that both CFRP and GFRP confinement are effective in improving the strength and ductility of geopolymer concrete. FRP confinement is equally as effective on large geopolymer cylindrical samples as the smaller counterparts. The outcomes of this study can be used to improve the design and development of geopolymer concrete and FRP technologies, ultimately aiding sustainable construction methods whilst promoting carbon neutral design.