ABSTRACT: In order to investigate techniques to improve the mechanical behaviour of mine tailings, an investigation of the cyclic shear response of fibre-reinforced mine tailings was carried out in the present study. Cyclic simple shear tests were conducted on fibre-reinforced and non-reinforced mine tailings. The tailings, produced from gold mining, were classified as sandy silt with traces of clay. Polypropylene fibres (zero and 0.5%) were added to the material. Under monotonic shear conditions, the addition of fibres unstiffens the material. Under shear stress-controlled cyclic conditions, fibres improved the material shear response and produced a stiffer material. Under shear strain-controlled cyclic conditions, no improvement was observed as a result of addition of fibres and there was no effect on material stiffness. The agreement of the strength envelopes of both monotonic and cyclic stress paths, under different cyclic loading conditions, allows the use of the same strength parameters for mixtures analysed under different loading conditions.
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April 2015
Research Article|
April 01 2015
Cyclic shear behaviour of fibre-reinforced mine tailings Available to Purchase
L. Festugato;
L. Festugato
1
Professor, Department of Civil Engineering, Federal University of Rio Grande do Sul, Porto Alegre, Brazil, Telephone: +55 51 3308 3416; Telefax: +55 51 3308 3999; E-mail: lucas@ufrgs.br
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N.C. Consoli;
N.C. Consoli
2
Professor, Department of Civil Engineering, Federal University of Rio Grande do Sul, Porto Alegre, Brazil, Telephone: +55 51 3308 3552; Telefax: +55 51 3308 3999; E-mail: consoli@ufrgs.br (corresponding author)
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A. Fourie
A. Fourie
3
Professor, Department of Civil and Resource Engineering, The University of Western Australia, Perth, Australia, Telephone: +61 8 6488 4661; Telefax: +61 8 6488 1380; E-mail: andy.fourie@civil.uwa.edu.au
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Publisher: Emerald Publishing
Received:
April 03 2014
Revision Received:
August 22 2014
Accepted:
December 12 2014
Online ISSN: 1751-7613
Print ISSN: 1072-6349
© 2015 Thomas Telford Ltd
2015
Geosynthetics International (2015) 22 (2): 196–206.
Article history
Received:
April 03 2014
Revision Received:
August 22 2014
Accepted:
December 12 2014
Citation
Festugato L, Consoli N, Fourie A (2015), "Cyclic shear behaviour of fibre-reinforced mine tailings". Geosynthetics International, Vol. 22 No. 2 pp. 196–206, doi: https://doi.org/10.1680/gein.15.00005
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