Use of geopolymer concrete in column applications

Lokuge, Weena and Sanjayan, Jay and Setunge, Sujeeva (2015) Use of geopolymer concrete in column applications. 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-02 Sept 2015, Melbourne, Australia.

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Abstract

Geopolymer Concrete has been extensively studied in the past and recognised as a greener substitute for Ordinary Portland Cement (OPC) concrete. Geopolymer concrete is proven to have good engineering properties with a reduced carbon footprint. Geopolymers not only reduce the greenhouse gas emission but also use a large amount of industrial wastes such as fly ash and slag. This environmentally friendly material is being embraced by the construction industry after its use in the Global Change Institute at University of Queensland. However, research into the use of geopolymer concrete in structural applications is very limited.

This research paper aims at investigating the applicability of a constitutive relationship that authors developed for OPC concrete in predicting the constitutive relationship of geopolymer concrete. This model has the capacity to predict the lateral dilation of concrete which in turn will be used to establish the confinement provided by the lateral reinforcement in column applications. Load deformation behaviour of twelve geopolymer concrete slender columns reported in the literature is used to validate the proposed model. Since geopolymer concrete exhibits higher brittleness than OPC concrete, careful consideration should be given in the structural design of geopolymer concrete. Predicted behavior for slender geopolymer concrete columns using the proposed stress-strain relationship for confined geopolymer concrete is in good agreement with the experimental results. The outcomes of this paper will be useful in the structural analysis of geopolymer concrete columns.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying
Date Deposited: 15 Jun 2016 03:42
Last Modified: 03 Feb 2017 02:09
Uncontrolled Keywords: geopolymer concrete; stress-strain relationship; confinement; slender column
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
URI: http://eprints.usq.edu.au/id/eprint/28667

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