Residual Mechanical Properties and Durability of High-Strength Concrete with Polypropylene Fibers in High Temperatures.

Investigations into the fire resistance of high-strength concrete (HSC) is extremely important to optimize structural design in construction engineering. This work describes the influence of polypropylene fibers on the mechanical properties and durability of HSC at high temperatures (25, 100, 200, 400, 600 and 800 °C). HSC specimens with 2 kg/m composed of polypropylene fibers are tested in a temperature range of 25 to 800 °C, followed by microstructural analysis.