The Thermal Effects on the Self-Compacting Concrete Beams Exposed to the Fire "Experimental Case Study"

Abstract

Self-compacting concrete (SCC) is one of the most important technological developments in the field of construction materials, Its use has increased significantly in the construction industry in recent years due to its high properties in workability such as the filling and passing ability. The performance of elements made of SCC mixtures is largely unknown. In this work, beams made of (SCC) were produced in the laboratory and exposed to external fire at different reference times (30/60/90/120) min with two cooling methods (subjective, water). Selecting and evaluating three reaction stages (thermal transfer progress, spalling, surface microstructure). The results show that the damage of the loaded beam is interesting and corresponds to the characteristics of the cracks formed in the concrete section in the bending zone, which was documented photographically. The progress of thermal transfer has large values during (5-20) minutes in the heating phase and assumes different values (10-30%) in the beam height, where the curve is closer to the line.