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Tensile properties of a novel fibre reinforced geopolymer composite with enhanced strain hardening characteristics

Tensile properties of a novel fibre reinforced geopolymer composite with enhanced strain hardening characteristics
Tensile properties of a novel fibre reinforced geopolymer composite with enhanced strain hardening characteristics
Strain hardening cementitious concrete is a type of fibre reinforced concrete with enhanced mechanical properties, including strain hardening and ductility. Geopolymer (cement-free) materials represent promising more sustainable alternatives to ordinary Portland cement. Heat treatment however is crucial when using geopolymer materials, to provide comparable mechanical properties to conventional concrete, and there are a number of practical limitations in the application of heat curing in large-scale structures.

The main aim of this study is to develop and evaluate the mechanical properties of a novel, sustainable strain hardening fibre-reinforced geopolymer composite material, cured under ambient temperature and thus suitable for cast-in-place applications. In particular, the effect of incorporation of discontinuous fibres on the mechanical performance and on the microstructure of the composite geopolymer materials has been evaluated. Three different types of fibres have been examined in this study (PVA, steel, and glass) with various volume fractions and aspect ratios. The results indicate that room temperature cured, cement-free, strain hardening geopolymer concrete with superior deflection capacity can be produced using a ternary geopolymer binder mix reinforced by 2% PVA fibre or with 2% and 3% of 13 mm length steel fibre.
0263-8223
402-427
Al-Majidi, Mohammed Haloob
2bf1e66a-804e-4a56-86cf-a9616f61f960
Lampropoulos, Andreas
cb4d2db2-76cb-4bef-be28-2fa4d0902de2
Cundy, Andrew B.
994fdc96-2dce-40f4-b74b-dc638286eb08
Al-Majidi, Mohammed Haloob, Lampropoulos, Andreas and Cundy, Andrew B. (2017) Tensile properties of a novel fibre reinforced geopolymer composite with enhanced strain hardening characteristics Composite Structures, 168, pp. 402-427. (doi:10.1016/j.compstruct.2017.01.085).

Al-Majidi, Mohammed Haloob, Lampropoulos, Andreas and Cundy, Andrew B. (2017) Tensile properties of a novel fibre reinforced geopolymer composite with enhanced strain hardening characteristics Composite Structures, 168, pp. 402-427. (doi:10.1016/j.compstruct.2017.01.085).

Record type: Article

Abstract

Strain hardening cementitious concrete is a type of fibre reinforced concrete with enhanced mechanical properties, including strain hardening and ductility. Geopolymer (cement-free) materials represent promising more sustainable alternatives to ordinary Portland cement. Heat treatment however is crucial when using geopolymer materials, to provide comparable mechanical properties to conventional concrete, and there are a number of practical limitations in the application of heat curing in large-scale structures.

The main aim of this study is to develop and evaluate the mechanical properties of a novel, sustainable strain hardening fibre-reinforced geopolymer composite material, cured under ambient temperature and thus suitable for cast-in-place applications. In particular, the effect of incorporation of discontinuous fibres on the mechanical performance and on the microstructure of the composite geopolymer materials has been evaluated. Three different types of fibres have been examined in this study (PVA, steel, and glass) with various volume fractions and aspect ratios. The results indicate that room temperature cured, cement-free, strain hardening geopolymer concrete with superior deflection capacity can be produced using a ternary geopolymer binder mix reinforced by 2% PVA fibre or with 2% and 3% of 13 mm length steel fibre.

PDF COST_paper - Accepted Manuscript
Restricted to Repository staff only until 15 May 2018.

More information

Accepted/In Press date: 28 January 2017
Published date: 15 May 2017
Organisations: Geochemistry

Identifiers

Local EPrints ID: 407187
URI: http://eprints.soton.ac.uk/id/eprint/407187
ISSN: 0263-8223
PURE UUID: fa583cbf-b00e-4e12-8ef9-3a65c4ef6bbb
ORCID for Andrew B. Cundy: ORCID iD orcid.org/0000-0003-4368-2569

Catalogue record

Date deposited: 01 Apr 2017 01:04
Last modified: 17 Jul 2017 13:52

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Contributors

Author: Mohammed Haloob Al-Majidi
Author: Andreas Lampropoulos
Author: Andrew B. Cundy ORCID iD

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