High-Strength Self-Compacting Concrete Exposed to Fire Test

Results are presented from experimental work on the high-temperature behavior of conventional vibrated high-strength concrete and self-compacting high-strength concrete. Concrete cylindrical specimens and prismatic specimens were subjected to a low heating rate of $0.5°\mathrm{C}∕\min$ (up to $400°\mathrm{C}$ ) and a high heating rate according to International Standard Organization 834 fire curve (up to $600°\mathrm{C}$ ). The experimental results show that the residual mechanical properties in reference to initial mechanical properties of self-compacting high-strength concretes were similar to that of conventional high-strength concrete. The risk of spalling for self-compacting high-strength concrete was greater than that of conventional high-strength concrete. As for the conventional vibrated high-strength concrete, the use of polypropylene fiber improved the thermal stability of self-compacting high-strength concrete. Adding polypropylene fiber modified thermal gradient (in consequence thermal stresses) in the tested concrete specimens during the heating–cooling cycles. This may contribute to explaining the difference in thermal stability.