Compressive stress-strain model for low-calcium fly ash-based geopolymer and heat-cured Portland cement concrete |
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| Affiliation: | 1. Centre for Infrastructure Engineering and Safety, School of Civil and Environmental Engineering, University of New South Wales, Sydney, NSW 2052, Australia;2. School of Civil Environmental and Mining Engineering, The University of Western Australia, Perth, WA 6009, Australia;1. Department of Civil Engineering, Ryerson University, Toronto, ON M5B 2M2, Canada;2. Master Peers Ltd., 101-2275 Upper Middle Road E, Oakville, ON L6H 0C3, Canada;1. Laboratory Mechanics of Structures – LMS, University Tahri Mohamed – Bechar, Department of Civil Engineering, BP n° 417, Bechar, Algeria;2. Centre for Infrastructure Engineering and Safety, School of Civil and Environmental Engineering, The University of New South Wales, Sydney, Australia;1. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China;2. College of Civil Engineering, Hunan University, Changsha, China |
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| Abstract: | This research focuses on elucidating the present knowledge gaps in geopolymer concrete's engineering properties, specifically its stress-strain behaviour. Geopolymer concrete (GPC) is an emerging alternative to ordinary Portland cement concrete (OPCC), and is produced via a polycondensation reaction between aluminosilicate source materials and an alkaline solution. As a relatively new material, many engineering properties of geopolymer concrete are still undetermined. In this paper, the compressive strength, modulus of elasticity and stress-strain behaviour of ambient and heat-cured GPC and OPCC have been studied experimentally. A total of 195 geopolymer concrete cylinders and 210 Portland cement concrete cylinders were tested for the above mentioned characteristics. Based on the experimental results, constitutive models describing the complete stress–strain behaviour in uniaxial compression have been developed for the low-calcium fly ash-based geopolymer concrete and the heat-cured Portland cement concrete. |
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| Keywords: | Geopolymer concrete Heat-cured Portland cement concrete Stress-strain model Modulus of elasticity |
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