The Effect of High Temperature Exposure on Properties of Hybrid Fiber Reinforced UHPC

Abstract:

High Performance Fiber Reinforced Concrete (HPFRC) became very popular material for its high mechanical strength, elastic modulus and corrosion resistance. However, also its high-temperature resistance is of a particular importance because of the fire safety. Therefore, the effect of high-temperature exposure on UHPC reinforced by combination of steel and PVA fibers was studied in the paper. PVA fibers were used to moderate concrete damage induced by water vapor evaporation from dense UHPC matrix. The UHPFRC samples were exposed to the temperatures of 200 °C, 400 °C, 600 °C, 800 °C, and 1 000 °C respectively. Concrete structural changes induced by high temperature action were described by the measurement of basic physical and mechanical properties. The realized experiments provide information on the changes of concrete porosity and loss of mechanical resistivity.

• Periodical: Materials Science Forum (Volume 909)
• Pages: 275-279
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.909.275
• Online since: November 2017
• Authors: Jan Fořt, David Čítek, Milena Pavlíková, Zbyšek Pavlík
• Keywords: DSC Analysis, High Performance Concrete, High Temperature Exposure, Hybrid Fiber Reinforcement, Mechanical Resistivity, Polypropylene Fibers, TG Analysis

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