Per: BEATRIZ CORDEIRO DE BONA (unifesspa), Vinícius Lemos Pereira (unifesspa), Isaac Gabriel Peixoto Borges de Oliveira (unifesspa), Vanessa Cordeiro de Bona (ufpa), Ponnyk Melo Torres (Faculdade metropolitana de marabá), Dilson Nazareno Pereira Cardoso (ufpa), Clesianu Rodrigues de Lima (unifesspa)
Abstract:
The deposition of electric steelmaking slag (EAE) is an environmental problem of the steel producing industry. In order to give purpose to this residue, the synthesis of geopolymers was developed through a mixture composed of kaolin clay (MBA), EAE, Sodium hydroxide (NaOH), alkaline aqueous sodium silicate (SSAA) and water. First, slag and Clay were selected, grinded, sifted and analyzed by means of X-ray diffraction, X-ray fluorescence and laser granulometry. With the calcined MBA, at 600°c for 2 hours, adding EAE (40 and 30% of the solid mixture), and the liquid mixture (NaOH, SSAA and Water), two traces of geopolymers were produced. The geopolymeric specimens produced were cured at room temperature (28 °C) for 7 and 28 days. After curing, they were characterized by the analysis of resistance to axial compression, water absorption by capillarity, apparent porosity and density. It was found that the Geopolymer with 30% of EAE presented better compressive strength compared to 40%. After 28 days of healing, the 30% trait showed an increase in water absorption, evidencing the failure to conclude the synthesis by decreasing the axial compressive strength. The EAE presented a favorable result to its use as a precursor in the synthesis of geopolymers, for the application in civil construction, reducing the possible environmental impacts of the deposit of this residue.