Avaliação de aspectos relacionados à durabilidade de concretosproduzidos com resíduos siderúrgicos de Terra de Shredder e póde FEA

Abstract

The use of steelmaking waste as a raw material for construction has been studied overtime and has proved to be quite viable. By combining civil construction with sustainabledevelopment, opting for raw materials that are by-products from other sectors can bea great solution for reducing environmental impacts. Given the large amount of wastegenerated by the steel industries, it is necessary to study the applicability of these byproducts in other production processes, such as in the production of concrete. In thisway, this research aimed to evaluate the performance of concrete produced with theaddition of two types of waste EAF dust and Shredder residueat levels of 3 and10% and with two different water/binder ratios (0.45 and 0.60). The influence of theincorporation of residues separately in the concretes was evaluated through the testsof slump test, specific mass and air content, water absorption, corrosion potential,height of chloride penetration by the colorimetric method and leaching of contaminants.The use of Shredder residue proved to be a little uncertain, due to the variation in itschemical composition and the presence of organic matter. Despite having reduced thewater absorption of the concrete, it did not have advantageous results in corrosionprotection. The addition of EAF dust, on the other hand, showed good results, reducingwater absorption, increasing corrosion protection in concretes with the addition of 10%of residue and reducing a little for those with the addition of 3%, but very close to theresults of the concretes with no addition. There was no leaching of contaminants inany of the concretes produced, even with the presence of heavy metals such as leadand chromium, which indicates that the stabilization of hazardous chemicalcompounds in the cement matrix occurred.