Retrofitting and strengthening interventions of RC members using ultra high performance concrete (UHPC)

Wee Teo*, Kazutaka Shirai, Yin Hor

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Two test series with various UHPC strengthening interventions were conducted in this study to investigate the behaviour of composite reinforced concrete (RC) slabs strengthened with UHPC. The first, RE series is a retrofit interventions, tested UHPC as patch material for repairing deteriorated concrete structures. As for the second, OV series is a UHPC overlay interventions, was used to strengthen soffit of RC slab members. The results showed that, in RE series, UHPC safeguard against diagonal cracking compare to conventional RC slab. The UHPC exhibited excellent energy absorption with extensive deflection hardening and ductility during the post cracking range. In OV series, all slabs showed formation of diagonal shear cracks and sign of debonding modes. The UHPC overlay delayed the development of shear cracking. The ultimate load carrying capacity and tendency of flexural failure increase with the overlay thickness.

Original languageEnglish
Title of host publicationIABSE Conference 2018
Subtitle of host publicationEngineering the Developing World
PublisherInternational Association for Bridge and Structural Engineering
Number of pages6
ISBN (Electronic)9783857481598
Publication statusPublished - 26 Apr 2018


  • High-rise buildings
  • Retrofit
  • Slabs
  • Strengthening
  • UHPC

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction


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