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    Development of high shrinkage Polyethylene Terephthalate (PET) shape memory polymer tendons for concrete crack closure

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    Sweeney_Smart_Materials_and_Structures.pdf (1.103Mb)
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    Publication date
    2017-02-24
    Author
    Teall, O.R.
    Pilegis, M.
    Sweeney, John
    Gough, Timothy D.
    Thompson, Glen P.
    Jefferson, A.
    Lark, R.
    Gardner, D.
    Keyword
    Shape memory polymers; Concrete cracks; Polyethylene Terephthalate (PET); Restrained shrinkage
    Rights
    © 2017 IOP Publishing Ltd. Reproduced in accordance with the publisher's self-archiving policy. This Accepted Manuscript will be available for reuse under a CC BY-NC-ND 3.0 licence.
    Peer-Reviewed
    Yes
    
    Metadata
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    Abstract
    The shrinkage force exerted by restrained shape memory polymers can potentially be used to close cracks in structural concrete. This paper describes the physical processing and experimental work undertaken to develop high shrinkage die-drawn Polyethylene Terephthalate (PET) shape memory polymer tendons for use within a crack closure system. The extrusion and die-drawing procedure used to manufacture a series of PET tendon samples is described. The results from a set of restrained shrinkage tests, undertaken at differing activation temperatures, are also presented along with the mechanical properties of the most promising samples. The stress developed within the tendons is found to be related to the activation temperature, the cross-sectional area and to the draw rate used during manufacture. Comparisons with commercially-available PET strip samples used in previous research are made, demonstrating an increase in restrained shrinkage stress by a factor of two for manufactured PET filament samples.
    URI
    http://hdl.handle.net/10454/11340
    Version
    Accepted Manuscript
    Citation
    Teall OR, Pilegis M, Sweeney J et al (2017) Development of high shrinkage Polyethylene Terephthalate (PET) shape memory polymer tendons for concrete crack closure. Smart Materials and Structures. 26(4): 045006.
    Link to publisher’s version
    https://doi.org/10.1088/1361-665X/aa5d66
    Type
    Article
    Collections
    Engineering and Informatics Publications

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