Investigating the direct and flexural tensile strength of ultra-high performance fibre reinforced concrete

Romaine, David (2016) Investigating the direct and flexural tensile strength of ultra-high performance fibre reinforced concrete. MEng dissertation, University of Portsmouth.

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    Abstract

    The focus of this research project was to assess the flexural and direct tensile response of Ultra-High Performance Fibre Reinforced Concrete (UHPFRC) to determine whether they could be correlated through an experimental mathematical approach. Strength tests were also carried out on Normal Concrete (NC) and traditional steel rebar Reinforced Concrete (RC), in order to determine whether UHPFRC exhibited superior tensile strength.
    UHPFRC beams with 13mm long hooked fibres making up 2% of the total volume were produced, alongside RC beams containing two 490mm longitudinal steel bars of 10mm diameter. NC beams were also produced as a control specimen. All the beams had identical cross sections and lengths. Four-Point bending and direct tension tests were carried out on the concrete beams, in order to determine the concretes flexural and tensile strength, respectively.
    It was concluded that the data acquired in this test was too limited and could not be used to attempt to successfully back calculate UHPFRC’s tensile response from its bending behaviour. However, it was determined that UHPFRC exhibits superior direct tensile and flexural strength than traditional RC. Furthermore, it was found that fibre orientation and distribution have a major effect on UHPFRC’s flexural and direct tensile strength.

    Item Type: Dissertation
    Departments/Research Groups: Faculty of Technology > School of Civil Engineering and Surveying
    Depositing User: Jane Polwin
    Date Deposited: 17 Aug 2016 16:23
    Last Modified: 17 Aug 2016 16:23
    URI: http://eprints.port.ac.uk/id/eprint/21529

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