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Effect of fibre content and specimen size on flexural properties of ultra high performance fibre reinforced concrete (UHPFRC)

Research output: Chapter in Book/Report/Conference proceedingChapter (peer-reviewed)

Ultra High Performance Fibre Reinforced Concrete (UHPFRC) is a relatively new construction material with significantly higher compressive and tensile strength in addition to having much more ductility compared to normal reinforced concrete. Compared to other factors that could influence its mechanical behaviour, studies to fully establish the size effects of UHPFRC specimens are limited most likely due to the high cost involved in testing the wide range of sizes required.
In this study, the effect of specimen size on flexural strength of UHPFRC was investigated by experimental tests at fibre contents of 2, 4 and 6%. Three point Bending (TPB) tests were conducted on geometrically similar notched specimens of depths varying between 25-250mm. On smaller samples, the edge effects were also investigated as a previous study indicated a possible significant contribution of these effects to the flexural strength of these samples.
The average flexural strength was observed to increase by 55% as fibre content increased from 2 to 4%. A further increase of fibre content to 6% resulted in a 30% increase in flexural strength. Specimen size was found to have little effect on the flexural strength. The edge effects due to fibre alignment were also found to be minimal.
Original languageEnglish
Title of host publicationBEFIB 2016
Subtitle of host publication9th Rilem International Symposium on Fiber Reinforced Concrete
PublisherRilem
Publication statusAccepted for publication - 10 May 2016
EventBEFIB 2016: 9th Rilem International Symposium on Fiber Reinforced Concrete - Pacific Gateway Hotel, Vancouver, Canada
Duration: 19 Sep 201621 Sep 2016

Conference

ConferenceBEFIB 2016: 9th Rilem International Symposium on Fiber Reinforced Concrete
CountryCanada
CityVancouver
Period19/09/1621/09/16

Related information

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