Abstract
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.
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 language | English |
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| Title of host publication | BEFIB 2016 |
| Subtitle of host publication | 9th Rilem International Symposium on Fiber Reinforced Concrete |
| Publisher | Rilem |
| Publication status | Accepted for publication - 10 May 2016 |
| Event | BEFIB 2016: 9th Rilem International Symposium on Fiber Reinforced Concrete - Pacific Gateway Hotel, Vancouver, Canada Duration: 19 Sept 2016 → 21 Sept 2016 |
Conference
| Conference | BEFIB 2016: 9th Rilem International Symposium on Fiber Reinforced Concrete |
|---|---|
| Country/Territory | Canada |
| City | Vancouver |
| Period | 19/09/16 → 21/09/16 |