Per: paulo anderson aranha ferreira (universidade federal do pará), damares da cruz barbosa nascimento (universidade federal do pará), THIAGO CORRêA (UNIVERSIDADE FEDERAL DO PARÁ), MATHAUS MORAES LUCAS (UNIVERSIDADE FEDERAL DO PARÁ), SERGIO NEVES MONTEIRO (INSTITUTO MILITAR DE ENGENHARIA ), ALISSON CLAY RIOS DA SILVA (UNIVERSIDADE FEDERAL DO PARÁ), VERôNICA SCARPINI CANDIDO (UNIVERSIDADE FEDERAL DO PARÁ)
Abstract:
Geopolymers are inorganic materials, aluminosilicates activated alkaline by geopolymerization reaction. As they have properties similar to Portland cement, research has been carried out to ensure the use of geopolymers in civil construction. The present work deals with the production of geopolymeric mortars, added with Blast Furnace Slag (EAF), subjected to a temperature of 300°C and 800°C. For this study, metakaolin, blast furnace slag (EAF), and commercial sand were used in the addition percentages of 0%, 59%, 69% and 75%, and for the alkaline solution, potassium hydroxide (KOH) and Sodium Silicate (Na2SiO3). After production, they were cured and then subjected to a temperature of 300°C and 800°C. For analysis purposes, Optical Microscopy (OM) and Rietveld Refinement characterizations were performed on the metakaolin. Finally, the result of the Rietveld refinement showed a GOF value equal to 1.71, and identified crystallinity peaks of quartz (Si), alumohydrocalcite (Al) and Mica (M). The geopolymeric mortar with 69% of aggregate as a material superior to other formulations, due to the low percentage of defects in the morphology of the fragmented surface, considering the temperature variation, from 300°C to 800°C.