An evaluation of the performance of high volume fly ash concrete after exposure to elevated temperatures

Lott, Jake Alexander (2016) An evaluation of the performance of high volume fly ash concrete after exposure to elevated temperatures. BEng dissertation, University of Portsmouth.

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    This dissertation project describes and explains the laboratory based research that took place for the investigation for how high volume fly ash concrete behaves at elevated temperatures in comparison to conventional concrete. The purpose of the study was to establish which type of concrete was more affected by elevated temperatures.
    All concrete cylinders were made and cured in accordance with BS EN 12390-1 and BS EN 12390-2. From there 3 cylinders from each concrete mix was tested after either room temperature, 200oC or 400oC exposure. After the heating regime was finished the concrete was tested under compressive strength (BS EN 12390-3), elastic modulus (BS 1882-121), stiffness damage testing (BS 1881-15) and mass loss testing.
    Whilst fly ash concrete produced lower magnitude results, the reaction of the fly ash concrete to elevated temperature was considered better than that of the conventional concrete. In compressive strength testing and elastic modulus testing the fly ash initially increased in mechanical performance from the room temperature performance before declining at 400oC. Furthermore under damage index, chord modulus ratio and unloading stiffness ratio the fly ash concrete produced results near equal in performance to the conventional concrete. Furthermore, mass loss produced similar results for both concretes.

    Item Type: Dissertation
    Departments/Research Groups: Faculty of Technology > School of Civil Engineering and Surveying
    Depositing User: Beth Atkins
    Date Deposited: 05 Sep 2016 08:46
    Last Modified: 05 Sep 2016 08:46

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