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

3 Citations (Scopus)
24 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 statusPublished - 31 Dec 2021

Keywords

  • nitinol fibres
  • nitinol powder
  • ductility
  • cementitious composite

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