Durability of concrete produced by replacing sand with iron ore tailings
DOI:
https://doi.org/10.46421/entac.v20i1.5921Keywords:
Concrete, Iron Ore Tailings (IOT), Durability, SustainabilityAbstract
R
Replacing sand with iron ore tailings (IOT) aims to contribute to sustainability in civil construction and reduce the environmental impact of mining. The replacement range between 30% and 50% presents the best results for compressive strength. This study produced and tested reference specimens and specimens with IOT replacement of 30% and 50% for ages 7 and 28 days. Water absorption tests (Abs), void ratio (R-void), accelerated carbonation, and acid attack were carried out. The compressive resistance experiments showed that the 30% replacement rate leads to up to 1/3 in gains when compared to the reference, while the 50% replacement resulted in losses of 30% in resistance. The incorporation of IOT showed a similar pattern for durability properties; there is less mass gain for carbonation with 30% replacement, as well as lower (Abs) and (R-void); however, the mass loss is more significant at 30% for the acid attack test. The study suggests that IOT is a viable alternative for sustainability, given the ability to reduce the extraction of natural resources with the potential for significant changes in the consumption of conventional materials and the management of mining waste.
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