A shape memory polymer concrete crack closure system activated by electrical current
View/ Open
Sweeney_Smart_Materials_and_Structures.pdf (3.303Mb)
Download
Publication date
2018-05-31Rights
© 2018 IOP Publishing Ltd. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.Peer-Reviewed
Yes
Metadata
Show full item recordAbstract
The presence of cracks has a negative impact on the durability of concrete by providing paths for corrosive materials to the embedded steel reinforcement. Cracks in concrete can be closed using shape memory polymers (SMP) which produce a compressive stress across the crack faces. This stress has been previously found to enhance the load recovery associated with autogenous selfhealing. This paper details the experiments undertaken to incorporate SMP tendons containing polyethylene terephthalate (PET) filaments into reinforced and unreinforced 500 × 100 × 100 mm structural concrete beam samples. These tendons are activated via an electrical supply using a nickelchrome resistance wire heating system. The set-up, methodology and results of restrained shrinkage stress and crack closure experiments are explained. Crack closure of up to 85% in unreinforced beams and 26%–39% in reinforced beams is measured using crack-mouth opening displacement, microscope and digital image correlation equipment. Conclusions are made as to the effectiveness of the system and its potential for application within industry.Version
Published versionCitation
Teall O, Pilegis M, Davies R et al (2018) A shape memory polymer concrete crack closure system activated by electrical current. Smart Materials and Structures. 27(7): 075016.Link to Version of Record
https://doi.org/10.1088/1361-665X/aac28aType
Articleae974a485f413a2113503eed53cd6c53
https://doi.org/10.1088/1361-665X/aac28a