Effect of strain rate on geopolymer concrete

Lokuge, Weena and Karunasena, W. and Heemskerk, Colin (2013) Effect of strain rate on geopolymer concrete. In: Concrete 2013: Understanding Concrete, 16-18 Oct 2013, Gold Coast, Australia.

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Geopolymer concrete has been receiving a great attention by the researchers due to the world wide focus on using more environmentally friendly products in the construction industry. There is no literature available on the effect that differing strain rates have on geopolymer concrete, a gap in the literature that this project aims to fill. The mix design used in this project achieved different compressive strengths by varying the heat curing time. In Australia, fibre reinforced geopolymer concrete is being used in precast panels in underground constructions. Commercially available geopolymer cement and synthetic fibres are effectively being used to produce elements that are more durable. A total of eight different batches were made by having two curing regimes (oven curing with different times and ambient curing) and two different polypropelene fibre concentrations (0.05% and 0.15% fibres by weight). All the samples were 100 mm diameter and 200 mm high, tested on the 28 day and the tests were duplicated. These were tested under three different strain rates, 0.5 mm/min, 1 mm/min and 2 mm/min.
It was found that the compressive strength, modulus of elasticity and poisson's ratio of geopolymer concrete varies with varying strain rates. Ultimate strength and ultimate strain of geopolymer concrete increases with the increasing strain rate which is consistent with the reported literature for geopolymer mortar.

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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: (c) 2013 The Author(s)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 -)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 -)
Date Deposited: 25 Nov 2013 00:12
Last Modified: 15 Sep 2014 04:18
Uncontrolled Keywords: geopolymer concrete; strain rate; fibres
Fields of Research (2008): 09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
09 Engineering > 0907 Environmental Engineering > 090703 Environmental Technologies
Socio-Economic Objectives (2008): B Economic Development > 87 Construction > 8703 Construction Materials Performance and Processes > 870301 Cement and Concrete Materials
URI: http://eprints.usq.edu.au/id/eprint/24285

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