Effects of nitinol on the ductile performance of ultra high ductility fibre reinforced cementitious composite

Gideon Ayim-Mensah*, Milan Radosavljevic

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)
9 Downloads (Pure)

Abstract

The effects of nitinol on the ductile performance of fibre reinforced cementitious composites were investigated in this study. Nitinol fibres with two different diameters of 1 mm and 0.5 mm and nitinol powder of diameter 70 nm were used as micro-reinforcement and reactive powders respectively. The test results showed that nitinol powder accelerates the hydration of cement and promotes the nucleation of TiO2 onto C-S-H leading to increased flexural and compressive strength. The nitinol fibre cementitious composite achieved ductilities of 7.3% and 7.8% with 1 mm and 0.5 mm nitinol fibres respectively at 28 days of curing. However, the nitinol fibres reinforced cementitious composites were unable to sustain ductilities after 90-days of curing losing nearly half of their ductile potency. On the other hand, nitinol powder achieved ductilities of 2.8% and 5.6% at 28 and 90 days of curing, respectively. Nitinol powder showed a potential as a ductile cementitious composite without the use of fibres.
Original languageEnglish
Article numbere00582
Number of pages60
JournalCase Studies in Construction Materials
Volume15
Early online date27 May 2021
DOIs
Publication statusE-pub ahead of print - 27 May 2021

Keywords

  • nitinol fibres
  • nitinol powder
  • ductility
  • cementitious composite

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