INFLUENCIA DE LAS ALTAS TEMPERATURAS EN LA RESISTENCIA A LA COMPRESIÓN DEL COMPUESTO DE RESIDUOS DE MINERAL DE HIERRO/CEMENTO

The various properties of mortars produced with iron ore tailings and cement (IOT/cement) at room temperature have been extensively studied, but research on high-temperature behavior is scarce. The objective of this study is to analyze the compressive strength and mass loss of these mortars when subjected to high temperatures. The test specimens (TSs) were exposed to different temperature levels (100°C to 1100°C) and subsequently subjected to axial compression tests. The results showed that with increasing temperature, there was a loss of strength. The loss of strength exhibited a linear trend and became more pronounced after 350°C. The TSs subjected to 1100°C exhibited an 80% loss of strength, while the mass loss was less than 5%. One of the contributions of this study, in line with current research, is to emphasize the importance of composites (IOT/cement) as a sustainable and economically viable alternative, given that iron ore tailings are generated in large quantities during the beneficiation process. Another contribution is to demonstrate that these composites can result in mortars with a significant reduction in compressive strength and a small mass loss when exposed to high temperatures. Furthermore, it highlights that they meet all performance and safety requirements in fire situations, making them a non-combustible product.