Investigation on Toughness of Fibre Cocktail Reinforced Self Consolidating Concrete after High Temperature

Abstract:

The effect of different fibres on the residual load-bearing capacity and the failure pattern of high-performance self consolidating concrete (HPSCC) after exposure to high temperature hass been studied in this work. The polypropylene fibers mitigate the spalling of HPSCC element clearly, but did not show clear effect on the mechanic properties of concrete. The macro steel fiber reinforced HPSCC showed higher flexural toughness and ultimate load before and after high temperatures. The mechanical properties of hybrid fibre reinforced HPSCC (HFHPSCC) after heating were better than that of mono-fibre reinforced HPSCC. The failure mode changed from pull-out of steel fibers at lower temperature to broken down of steel fibers at higher temperature. The use of hybrid fibre can be effective in providing the residual strength and failure pattern, and improving the toughness of HPSCC after high temperature.

• Periodical: Materials Science Forum (Volume 650)
• Pages: 67-77
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.650.67
• Online since: May 2010
• Authors: Yi Ning Ding, Yue Hua Wang, Yu Lin Zhang
• Keywords: Failure Pattern, Fiber Reinforced High Performance Self Consolidating Concrete (FRHPSCC), Flexural Toughness, High-Temperature, Residual Strength

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