Experimental investigation on the fire resistance of cast-in-situ hollow core concrete slabs constructed using filler boxes and an assembly box system

Junli Lyu, Yong Wang, Ruben Van Coile, Zhaohui Huang, Yuner Huang

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

This paper presents the results of four fire tests on full-scale cast-in-situ, hollow core concrete slabs, constructed using filler boxes and an assembly box system. Experimental data include the furnace temperature, temperature distribution in the slab, and vertical and horizontal deflections during the heating and cooling phases, as well as observed cracking patterns. The test data indicate that the tested hollow slabs with plastic filler boxes have good performance in case of standard fire exposure with small vertical deflections and high deflection recovery in long duration testing. For slabs with assembly box systems serious spalling was observed, resulting in integrity failure after 69 minutes in one of the tests. Nevertheless, load bearing capacity was maintained for all tests. The tests highlight the importance of the boundary conditions and the arrangement of the filler system on the fire behaviour of the hollow slabs, particularly with respect to the observed cracking, spalling and structural integrity.
Original languageEnglish
Pages (from-to)144-163
JournalStructural concrete
Volume20
Issue number1
Early online date5 Aug 2018
DOIs
Publication statusPublished - Feb 2019

Keywords / Materials (for Non-textual outputs)

  • CONCRETE SLABS
  • Fire test
  • deflection
  • temperature
  • plastic filler

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